Marketo (MKTO) 10-K 12 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Feb. 27, 2015	Jun. 30, 2014
Document and Entity Information
Entity Registrant Name	Marketo, Inc.
Entity Central Index Key	1490660
Document Type	10-K
Document Period End Date	31-Dec-14
Amendment Flag	FALSE
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$469.20
Entity Common Stock, Shares Outstanding		42,045,629
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$112,644	$128,299
Accounts receivable, net of allowances of $393 and $329 for 2014 and 2013 respectively	37,867	26,946
Prepaid expenses and other current assets	5,756	3,218
Total current assets	156,267	158,463
Property and equipment, net	16,832	13,856
Goodwill	29,201	25,941
Intangible assets, net	7,076	7,095
Other assets	1,035	484
Total assets	210,411	205,839
Current liabilities:
Accounts payable	3,901	3,527
Accrued expenses and other current liabilities	20,691	23,055
Deferred revenue	62,945	41,356
Current portion of credit facility	2,719	2,187
Total current liabilities	90,256	70,125
Credit facility, net of current portion	2,653	5,372
Other liabilities	3,526	1,900
Total liabilities	96,435	77,397
Commitments and contingencies (Note 8)
Redeemable Noncontrolling Interest, Equity, Carrying Amount	800
Stockholder's equity:
Common stock, par value $0.0001 per share - 1,000,000 shares authorized as of December 31, 2014 and 2013; 41,481 and 39,250 shares issued and outstanding as of December 31, 2014 and 2013	4	4
Additional paid-in capital	297,420	257,801
Accumulated other comprehensive income	-350	198
Accumulated deficit	-183,898	-129,561
Total stockholders' equity	113,176	128,442
Total Liabilities, Redeemable Non-controlling Interest and Stockholders' Equity	$210,411	$205,839

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Condensed Consolidated Balance Sheets
Common Stock, Par or Stated Value Per Share	$0.00	$0.00
Common Stock, Shares Authorized	1,000,000,000	1,000,000,000
Common Stock, Shares, Issued	41,481,000	39,250,000
Common Stock, Shares, Outstanding	41,481,000	39,250,000

Consolidated_Statements_of_Ope

Consolidated Statements of Operations and Comprehensive Loss (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue:
Subscription and support	$131,060	$85,095	$52,756
Professional services and other	18,894	10,823	5,657
Total revenue	149,954	95,918	58,413
Cost of revenue:
Subscription and support	28,742	24,681	16,216
Professional services and other	22,059	13,298	8,442
Total cost of revenue	50,801	37,979	24,658
Gross profit:
Subscription and support	102,318	60,414	36,540
Professional services and other	-3,165	-2,475	-2,785
Total gross profit	99,153	57,939	33,755
Operating expenses:
Research and development	30,337	23,321	18,799
Sales and marketing	98,843	62,769	37,776
General and administrative	25,583	18,655	11,388
Total operating expenses	154,763	104,745	67,963
Loss from operations	-55,610	-46,806	-34,208
Other income (expense), net	178	-526	-158
Loss before provision for income taxes	-55,432	-47,332	-34,366
Provision (benefit) for income taxes	-477	28	19
Net loss	-54,955	-47,360	-34,385
Net loss attributable to redeemable non-controlling interests	618
Net loss attributable to Marketo	($54,337)	($47,360)	($34,385)
Net loss per share of common stock, basic and diluted (in dollars per share)	($1.35)	($1.92)	($12.26)
Shares used in computing net loss per share of common stock, basic and diluted (in shares)	40,385	24,709	2,806

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Comprehensive Loss (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Consolidated Statements of Comprehensive Loss
Net loss	($54,955)	($47,360)	($34,385)
Other comprehensive income (loss):
Foreign currency translation adjustments	-715	53	26
Total comprehensive loss	-55,670	-47,307	-34,359
Net loss attributable to redeemable non-controlling interests	618
Other comprehensive (income) loss attributable to redeemable non-controlling interests	167
Comprehensive loss attributable to Marketo	($54,885)	($47,307)	($34,359)

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Convertible Preferred Stock	Convertible Preferred Stock	Common Stock	Common Stock	Common Stock	Additional Paid-in Capital	Additional Paid-in Capital	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Stockholders Equity including Redeemable Noncontrolling Interests In Subsidiary Member	Stockholders Equity including Redeemable Noncontrolling Interests In Subsidiary Member	Stockholders Equity including Redeemable Noncontrolling Interests In Subsidiary Member	Crowd Factory	Insightera, Ltd.	Total
In Thousands, except Share data, unless otherwise specified	Crowd Factory	USD ($)	Crowd Factory	Insightera, Ltd.	USD ($)	Crowd Factory	Insightera, Ltd.	USD ($)	USD ($)	USD ($)	Crowd Factory	Insightera, Ltd.	USD ($)	USD ($)	USD ($)	USD ($)
	USD ($)					USD ($)	USD ($)				USD ($)	USD ($)
Balance at Dec. 31, 2011		$106,821						$2,184	$119	($47,816)			$61,308			$61,308
Balance (in shares) at Dec. 31, 2011		25,034,000			2,696,000
Increase (Decrease) in Shareholders' Equity
Issuance of common stock and convertible preferred stock in connection with acquisition	12,300					748					13,048			13,048		13,048
Issuance of common stock and convertible preferred stock in connection with acquisition (in shares)	842,000		99,000
Issuance of common stock upon exercise and early exercise of stock options								362					362			362
Issuance of common stock upon exercise and early exercise of stock options (in shares)					433,000
Withholding taxes for the net share settlement of an equity award (in shares)																32,000
Repurchase of common stock (in shares)					-33,000
Vesting of early exercise options								233					233			233
Stock-based compensation expense								2,972					2,972			2,972
Net loss										-34,385			-34,385			-34,385
Foreign currency translation adjustments									26				26			26
Balance at Dec. 31, 2012		119,121						6,499	145	-82,201			43,564			43,564
Balance (in shares) at Dec. 31, 2012		25,876,000			3,195,000
Increase (Decrease) in Shareholders' Equity
Issuance of common stock and convertible preferred stock in connection with acquisition							14,069					14,069			14,069	14,069
Issuance of common stock and convertible preferred stock in connection with acquisition (in shares)				428,000
Issuance of common stock in connection with initial public offering, net of underwriting discounts					1			80,505					80,506			80,506
Issuance of common stock in connection with initial public offering, net of underwriting discounts (in shares)					6,659,000
Issuance of common stock in connection with private placement								6,500					6,500			6,500
Issuance of common stock in connection with private placement (in shares)					500,000
Issuance of common stock in connection with follow-on offering, net of underwriting discounts								22,519					22,519			22,519
Issuance of common stock in connection with follow-on offering, net of underwriting discounts (in shares)					662,000
Cost incurred with registration of common stock issued in connection with acquisition of Insightera								-226					-226			-226
Costs incurred with follow-on offering								-4,079					-4,079			-4,079
Conversion of preferred stock to common stock		-119,121			3			119,118
Conversion of preferred stock to common stock (in shares)		-25,876,000			25,876,000
Issuance of common stock upon exercise and early exercise of stock options								4,278					4,278			4,278
Issuance of common stock upon exercise and early exercise of stock options (in shares)					1,778,000
Vesting of restricted stock units (in shares)					169,000
Withholding taxes for the net share settlement of equity awards								124					124			124
Withholding taxes for the net share settlement of an equity award (in shares)					-5,000											5,000
Repurchase of common stock (in shares)					-12,000
Vesting of early exercise options								655					655			655
Stock-based compensation expense								8,087					8,087			8,087
Net loss										-47,360			-47,360			-47,360
Foreign currency translation adjustments									53				53			53
Balance at Dec. 31, 2013					4			257,801	198	-129,561			128,442			128,442
Balance (in shares) at Dec. 31, 2013					39,250,000
Increase (Decrease) in Shareholders' Equity
Issuance of common stock and convertible preferred stock in connection with acquisition								4,756					4,756			4,756
Issuance of common stock and convertible preferred stock in connection with acquisition (in shares)					141,000
Costs incurred with follow-on offering								62					62			62
Issuance of common stock upon exercise and early exercise of stock options								5,508					5,508			5,508
Issuance of common stock upon exercise and early exercise of stock options (in shares)					1,534,000
Issuance of common stock under employee stock purchase plan					0			6,143					6,143			6,143
Issuance of common stock under employee stock purchase plan (in shares)					422,000
Investment by redeemable non-controlling interests								369					369			369
Vesting of restricted stock units (in shares)					234,000
Withholding taxes for the net share settlement of equity awards								2,641					2,641			2,641
Withholding taxes for the net share settlement of an equity award (in shares)					-87,000											87,000
Repurchase of common stock (in shares)					-13,000
Vesting of early exercise options								279					279			279
Stock-based compensation expense								25,143					25,143			25,143
Net loss										-54,337			-54,337			-54,337
Foreign currency translation adjustments									-548				-548			-548
Balance at Dec. 31, 2014					$4			$297,420	($350)	($183,898)			$113,176			$113,176
Balance (in shares) at Dec. 31, 2014		0			41,481,000

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net loss attributable to Marketo	($54,337)	($47,360)	($34,385)
Net loss attributable to redeemable non-controlling interests	618
Net loss	-54,955	-47,360	-34,385
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	9,475	4,621	1,731
Stock-based compensation expense	25,120	8,075	2,972
Deferred income taxes	-672	-65
Changes in operating assets and liabilities:
Accounts receivable, net	-11,362	-12,702	-4,989
Prepaid expenses and other current assets	-1,388	-698	-203
Other assets	-709	-46	-505
Accounts payable	-341	2,050	-1,624
Accrued expenses and other current liabilities	-1,599	13,177	3,647
Deferred revenue	22,371	20,438	9,536
Deferred rent	37	141	-28
Net cash used in operating activities	-14,023	-12,369	-23,848
Cash flows from investing activities:
Purchase of property and equipment	-8,378	-11,401	-4,354
Cash provided by (used in) acquisition, net of cash acquired	326	-6,216	698
Capitalized software development	-645	-459
Net cash used in investing activities	-8,697	-18,076	-3,656
Cash flows from financing activities:
Proceeds from initial public offering, net of underwriting discount		80,506
Proceeds from private placement		6,500
Proceeds from follow-on offering, net of underwriting discount		22,519
Proceeds from issuance of common stock upon exercise of stock options	5,540	4,985	912
Proceeds from employee stock purchase plan	6,143
Repurchase of unvested common stock from terminated employees	-49	-22	-67
Withholding taxes remitted for the net share settlement of an equity awards	-2,638	-124
Proceeds from issuance of debt		4,500	3,640
Repayment of debt	-2,187	-582
Investment from non-controlling interest	1,953
Payment incurred for common stock registration related to acquisition	-319	-35
Payment of initial public offering costs and follow-on offering costs	-104	-3,820	-99
Net cash provided by financing activities	8,339	114,427	4,386
Effect of foreign exchange rate changes on cash and cash equivalents	-1,274	70	-35
Net increase (decrease) in cash and cash equivalents	-15,655	84,052	-23,153
Cash and cash equivalents - beginning of period	128,299	44,247	67,400
Cash and cash equivalents -end of period	112,644	128,299	44,247
Supplemental disclosures of cash flow information:
Cash paid for interest	272	211	52
Cash paid for income taxes	80	33	4
Supplemental disclosure of noncash investing and financing activities:
Conversion of convertible preferred stock into common stock upon initial public offering		119,121
Convertible preferred stock and common stock issued in connection with acquisitions, including options assumed	4,756	14,069	13,048
Vesting of early exercise options	279	655	233
Property and equipment acquired through tenant improvement allowance	$973	$1,262

The_Company_and_Summary_of_Sig

The Company and Summary of Significant Accounting Policies and Estimates	12 Months Ended
	Dec. 31, 2014
The Company and Summary of Significant Accounting Policies and Estimates
The Company and Summary of Significant Accounting Policies and Estimates	1. The Company and Summary of Significant Accounting Policies and Estimates
	Business
	Marketo, Inc. (Marketo or the Company) was incorporated in the state of California on January 20, 2006. The Company was reincorporated in the state of Delaware on December 17, 2009. The Company operates from its headquarters in San Mateo, California and has operating subsidiaries in Ireland, Australia, Israel, Japan and United Kingdom.
	Marketo is a provider of a cloud-based marketing solutions platform that is purpose-built to enable organizations to engage in modern relationship marketing. The Company's solutions platform is designed to enable the effective management, optimization and analytical measurement of marketing activities, enabling organizations to acquire new customers more efficiently, build stronger relationships with existing customers, improve sales effectiveness and drive faster revenue growth. On this platform, the Company delivers an easy to use, integrated suite of advanced applications. The Company generally offers its services on an annual subscription basis with quarterly or annual payment terms.
	Initial Public Offering and Follow-On Offering
	On May 17, 2013, the Company closed its initial public offering (IPO) where it sold 6,968,435 shares of common stock to the public, including the underwriters' overallotment option of 908,926 shares of common stock and 309,509 shares of common stock sold by selling stockholders, at a price of $13.00 per share. In addition, the Company sold 500,000 shares of common stock to funds affiliated with Battery Ventures in a concurrent private placement, at a price of $13.00 per share. The Company received aggregate proceeds of approximately $87.0 million from the IPO and concurrent private placement, net of underwriters' discounts and commissions, but before deduction of offering expenses of approximately $3.4 million. Upon the closing of the IPO, all shares of the Company's outstanding convertible preferred stock automatically converted into 25,876,142 shares of common stock.
	On September 13, 2013, the Company closed its follow-on public offering of 6,000,000 shares of its common stock, which included 662,498 shares of common stock sold by the Company and 5,337,502 shares of common stock sold by selling stockholders. The public offering price of the shares sold in the follow-on offering was $35.50 per share. The Company received aggregate proceeds of approximately $22.5 million from the follow-on offering, net of underwriters' discounts and commissions applicable to the sale of shares by the Company, but before deduction of offering costs of approximately $0.7 million payable by the Company.
	The Company did not receive any proceeds from the sale of shares by the selling stockholders.
	As of December 31, 2014, the Company had 41.5 million shares of common stock issued and outstanding.
	Principles of Consolidation
	The consolidated financial statements are prepared in accordance with accounting principles generally accepted in the U.S. (U.S. GAAP) and include the consolidated accounts of the Company and its wholly-owned and majority-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation.
	Redeemable Non-controlling Interests
	The Company's Japanese subsidiary (Marketo KK) is not wholly owned. The agreements with the minority investors of Marketo KK contain redemption features whereby the interests held by the minority investors are redeemable either (i) at the option of the minority investors or (ii) at the option of the Company beginning on the seventh anniversary of the initial capital contribution. If the interests of the minority investors were to be redeemed under these agreements, the Company would be required to redeem the interest based on a prescribed formula derived from the relative revenues of Marketo KK and the Company. The balance of the redeemable non-controlling interests is reported at the greater of the initial carrying amount adjusted for the redeemable non-controlling interest's share of earnings or losses and other comprehensive income or loss, or its estimated redemption value. The resulting changes in the estimated redemption amount (increases or decreases) are recorded with corresponding adjustments against retained earnings or, in the absence of retained earnings, additional paid-in-capital. These interests are presented on the balance sheet outside of equity under the caption "Redeemable non-controlling interests."
	Use of Estimates
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Such management estimates and assumptions include the estimated selling price for the various elements in our customer contracts, the allowance for doubtful accounts, stock-based compensation expense, useful lives of intangible assets and the valuation of deferred tax assets and acquired intangible assets. Actual results could differ materially from those estimates, and such differences could be material to the financial statements and affect the results of operations reported in future periods.
	Foreign Currency
	The functional currency of the Company's foreign subsidiaries is their respective local currency. Assets and liabilities denominated in currencies other than the U.S. dollar are translated into U.S. dollars at the exchange rates in effect at the balance sheet dates, with the resulting translation adjustments directly recorded to a separate component of accumulated other comprehensive income (loss). Income and expense accounts are translated at average exchange rates during the year. Foreign currency remeasurement and transaction gains and losses are recorded in other income (expense), net. The Company recognized net foreign currency transaction gains of approximately $0.4 million during the year ended December 31, 2014, and net foreign currency transaction losses of $0.3 million and $0.1 million during the years ended December 31, 2013 and 2012, respectively.
	Segments
	The Company's chief operating decision maker is its Chief Executive Officer (CEO), who reviews financial information presented on a consolidated basis, accompanied by information about revenue by geographic region. Accordingly, the Company has determined that it has a single operating segment.
	Cash and Cash Equivalents
	The Company considers all highly liquid investments purchased with original maturity of three months or less to be cash equivalents. Total cash equivalents were $104.0 million and $124.7 million as of December 31, 2014 and 2013, respectively, consisting primarily of money market funds.
	Allowance for Doubtful Accounts
	Accounts receivable are carried at the original invoiced amount less an allowance made for doubtful accounts. The Company maintains an allowance for doubtful accounts based on the probability of future collection. When management becomes aware of circumstances that may decrease the likelihood of collection, it records a specific allowance against amounts due, which reduces the net receivable to the amount that management reasonably believes will be collected. For all other customers, management determines the adequacy of the allowance based on historical loss patterns, the number of days that billings are past due and an evaluation of the potential risk of loss associated with specific accounts. The Company reviews its allowance for doubtful accounts monthly and writes off receivable balances that are deemed to be uncollectible. Increases in the allowance are recorded in general and administrative expense in the period incurred. The Company does not have any off balance sheet credit exposure related to its customers.
	Below is a summary of the changes in allowance for doubtful accounts for the periods presented:
			Balance at		Provision, net		Write-offs			Balance at
			Beginning of		of Recoveries					End of
			Period							Period
			(in thousands)
	Year ended December 31, 2012		$	225	$	362	$	(251	)	$	336
	Year ended December 31, 2013			336		452		(459	)		329
	Year ended December 31, 2014			329		417		(353	)		393
	Property and Equipment
	Property and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the asset, which is generally two to three years. Amortization of leasehold improvements is computed using the straight-line method over the shorter of the lease term or the estimated useful life of the asset or improvement. Depreciation and amortization begins when the asset is ready for its intended use. Cost of maintenance and repairs that do not improve or extend the lives of the respective assets are expensed as incurred.
	Capitalized Software Development Costs
	Costs incurred to develop the Company's cloud-based platform and applications consist of (a) certain external direct costs of materials and services incurred in developing or obtaining internal-use computer software and (b) payroll and payroll-related costs for employees who are directly associated with, and who devote time to, a given project. These costs generally consist of internal labor during configuration, coding and testing activities. Research and development costs incurred during the preliminary project stage or costs incurred for data conversion activities, training, maintenance and general and administrative or overhead costs are expensed as incurred. Capitalization begins when the preliminary project stage is complete, management with the relevant authority authorizes and commits to the funding of the software project, it is probable the project will be completed, and the software will be used to perform the functions intended and certain functional and quality standards have been met. Additionally, the Company also capitalizes costs related to specific upgrades and enhancements when it is probable the expenditures will result in additional functionality. Capitalized software development costs are amortized on a straight-line basis over the estimated useful life, which is generally eighteen months to three years. Amortization expense during the years ended December 31, 2014, 2013 and 2012 was $0.3 million, $0.2 million and $0.1 million respectively.
	Business Combinations
	When the Company acquires businesses, it allocates the purchase price to tangible assets and liabilities, and identifiable intangible assets acquired. Any residual purchase price is recorded as goodwill. The allocation of the purchase price requires management to make significant estimates in determining the fair values of assets acquired and liabilities assumed, especially with respect to intangible assets. These estimates are based on historical experience and information obtained from the management of the acquired companies. These estimates can include, but are not limited to, the cash flows that an asset is expected to generate in the future, the appropriate weighted-average cost of capital, and the cost savings expected to be derived from acquiring an asset. These estimates are inherently uncertain and unpredictable. In addition, unanticipated events and circumstances may occur which may affect the accuracy or validity of such estimates.
	Goodwill and Other Intangible Assets
	The Company records goodwill when the consideration paid in a purchase acquisition exceeds the fair value of the net tangible assets and the identified intangible assets acquired. Goodwill is not amortized, but rather is tested for impairment. The Company performs testing for impairment of goodwill at the end of each year, or as events occur or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. The Company conducts a two-step test for impairment of goodwill. The first step of the test for goodwill impairment compares the fair value of the applicable reporting unit with its carrying value. If the fair value of a reporting unit is less than the reporting unit's carrying value, the Company will perform the second step of the test for impairment of goodwill. During the second step of the test for impairment of goodwill, the Company compares the implied fair value of the reporting unit's goodwill with the carrying value of that goodwill. If the carrying value of the goodwill exceeds the calculated implied fair value, the excess amount will be recognized as an impairment loss. The Company has determined that there is a single reporting unit for the purpose of goodwill impairment tests. Based on the above, the Company determined that its goodwill was not impaired at December 31, 2014.
	Other intangible assets with definite lives, consisting of capitalized software development costs, developed technology, domain names, customer relationships and non-compete agreements, are stated at cost less accumulated amortization and are amortized on a straight-line basis over their estimated remaining economic lives, ranging from one to seven years. Amortization expense related to capitalized software development costs and developed technology is included in cost of revenues. Amortization expense related to customer relationships and non-compete agreements is included in sales and marketing expense. Amortization expense related to domain names is included in general and administrative expense.
	Long-Lived Assets
	The Company continually monitors events and changes in circumstances that could indicate that carrying amounts of its long-lived assets, including property and equipment and identifiable intangible assets, may not be recoverable. When such events or changes in circumstances occur, the Company assesses the recoverability of long-lived assets by determining whether the carrying value of such assets will be recovered through their undiscounted expected future cash flow. If the future undiscounted cash flow is less than the carrying amount of these assets, the Company recognizes an impairment loss based on the excess of the carrying amount over the fair value of the assets. The Company did not recognize impairment charges on its long-lived assets during any of the periods presented.
	Concentration of Credit Risk and Significant Customers
	The Company's financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents and trade accounts receivable. Although the Company deposits its cash with multiple financial institutions, its deposits exceed federally insured limits. The Company generally does not require collateral from its customers and generally requires payment 30 days from the invoice date. The Company's accounts receivable are derived from revenue earned from customers located primarily in North America and Europe. The Company periodically evaluates the collectability of its accounts receivable and provides an allowance for potential credit losses as necessary, based on the age of the receivable and collection experience.
	No single customer accounted for more than 10% of accounts receivable as of December 31, 2014 and 2013. No single customer accounted for 10% or more of total revenue during the years ended December 31, 2014, 2013 and 2012.
	Revenue Recognition
	The Company derives its revenue from two sources:
	(1)   Subscription and support revenue. Subscription and support revenue consists of subscription fees from customers accessing the Company's cloud-based solutions platform and applications, as well as related customer support services; and
	(2)   Professional services and other revenue. Professional services and other revenue consists of fees associated with providing expert services that educate and assist the Company's customers on the best use of the Company's solutions as well as assist in the implementation of the Company's solution.
	Revenue recognition commences when all of the following conditions are met:
	•	Persuasive evidence of an arrangement exists;
	•	Delivery or performance has occurred;
	•	Fees are fixed or determinable; and
	•	Collectability is reasonably assured.
	In the majority of instances, revenue from new customers is generated under sales agreements with multiple elements, comprised of subscription and support fees from customers accessing the Company's cloud-based platform and applications and professional consultation services. The Company evaluates each element in a multiple-element arrangement to determine whether it represents a separate unit of accounting. An element constitutes a separate unit of accounting when the delivered item has stand-alone value and delivery of the undelivered element is probable and within the Company's control. Subscription and support have stand-alone value because they are routinely sold separately by the Company. Most of the professional services have stand-alone value because the Company has sold professional services separately, and there are several third party vendors that routinely provide similar professional services to the Company's customers on a stand-alone basis.
	The Company allocates total arrangement fees to each element in a multiple-element arrangement based on the relative selling price hierarchy of each element. The amount of arrangement fee allocated to each element is limited by contingent revenue, if any.
	The relative selling price hierarchy consists of the following: Selling price for a deliverable is based on its 1) VSOE, if available, 2) TPE, if VSOE is not available, or 3) ESP, if neither VSOE nor TPE is available. Because the Company has been unable to establish VSOE or TPE for the elements of its arrangements, the Company establishes the ESP for each element primarily by considering the median of actual sales prices of each type of subscription and support sold and the weighted average of actual sales prices of professional services sold. For subscription and support arrangements, management considered other factors such as database sizes, pricing practices and market considerations.
	Subscription and support revenue is recognized commencing upon delivery of the Company's cloud-based services, which is the date a new subscription is provisioned and made available to a new customer, or new or expanded capabilities are provisioned and added to an existing subscription, provided that all of the other revenue recognition criteria are first met, referred to as the "Commencement Date". Subscription and support revenue is recognized from the Commencement Date ratably thereafter over the remaining contractual term, which is generally three to 36 months. Amounts that have been invoiced are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met.
	Professional services and other have stand-alone value from the related subscription services. The majority of the Company's professional services contracts are offered on a time and material basis. When these services are not combined with subscription and support revenue in a multiple-element arrangement, services revenue is recognized as the services are rendered. Certain standard and non-standard professional service arrangements include customer acceptance provisions. Services provided under arrangements that include customer acceptance provisions are typically provided on a time and material basis, and the revenue is deferred and recognized upon customer acceptance of the service deliverable.
	The Company's professional services also consist of short-term enablement and implementation services, which are offered at a flat fee. The enablement services teams assist customers with standard adoption procedures for the Company's platform. Because such enablement services typically are completed within a short period (usually one to ten days), the Company recognizes revenue from this service upon completion. The implementation services consist of short-term "use it or lose it" services to assist customers with standard implementation and to implement the customer's first marketing campaign which are offered at a flat fee. Such flat fees are recognized ratably over the 120 day period.
	Education revenue is recognized after the services are performed.
	The Company's time and material and fixed price professional service contracts are generally delivered within one year from the date of the arrangement.
	Sales and other taxes collected from customers to be remitted to government authorities are excluded from revenue.
	Cost of Revenue
Cost of subscriptions, support, professional services and other revenue are expensed as incurred. Cost of subscription and support revenue primarily consists of expenses related to hosting the Company's service and providing support to the Company's customers. These expenses are comprised of data center operations costs and personnel and related costs directly associated with the Company's cloud infrastructure, customer support and customer success organizations, including salaries, benefits, bonuses and stock-based compensation, as well as allocated overhead. Overhead associated with facilities and depreciation, excluding depreciation related to the Company's data center infrastructure, is allocated to cost of revenue and operating expenses based on headcount. Cost of professional services and other revenue consists primarily of personnel and related costs directly associated with the Company's professional services and training organizations, including salaries, benefits, bonuses and stock-based compensation, the costs of sub-contracted third-party vendors, as well as allocated overhead.
Deferred Revenue
Deferred revenue consists of billings or payments received in advance of revenue recognition and are recognized as the revenue recognition criteria are met. The Company generally invoices its customers annually or in quarterly installments payable in advance. Accordingly, the deferred revenue balance does not represent the total contract value of annual or multi-year, noncancelable arrangements. The current portion of deferred revenue represents the amount that is expected to be recognized as revenue within one year from the balance sheet date. In all of the years presented, the Company did not have any long-term deferred revenue.
Commissions
Sales and marketing commissions are recognized as an expense generally at the time the customer order is signed. Substantially all of the effort by the sales and marketing organization is expended through the time of closing the sale with limited or no involvement thereafter. Commissions paid are subject to clawback by the Company in the event the customer fails to make payment on the agreement.
Warranties and Indemnification
The Company's cloud-based solutions platform and applications are typically warranted to perform in a manner consistent with general industry standards that are reasonably applicable and materially in accordance with the Company's on-line help documentation under normal use and circumstances.
The Company includes service level commitments to its customers warranting certain levels of uptime reliability and performance and permitting those customers to receive credits in the event that the Company fails to meet those levels. To date, the Company has not incurred any material costs as a result of such commitments and has not accrued any liabilities related to such obligations in the accompanying consolidated financial statements.
The Company's arrangements include provisions indemnifying customers against liabilities if the Company's products infringe a third-party's intellectual property rights. The Company has not incurred any costs as a result of such indemnification and has not accrued any liabilities related to such obligations in the accompanying consolidated financial statements.
The Company has also agreed to indemnify its directors and executive officers for costs associated with any fees, expenses, judgments, fines and settlement amounts incurred by any of those persons in any action or proceeding to which any of those persons is, or is threatened to be, made a party by reason of the person's service as a director or officer, including any action by the Company, arising out of that person's services as the Company's director or officer or that person's services provided to any other company or enterprise at the Company's request. The Company maintains director and officer insurance coverage that may enable the Company to recover a portion of any future indemnification amounts paid.
Advertising Costs
Advertising costs are expensed as incurred. For the years ended December 31, 2014, 2013 and 2012, advertising expenses were $1.9 million, $1.5 million and $1.2 million, respectively.
Stock-Based Compensation
The Company uses the fair value method for recording stock-based compensation. Stock-based compensation cost for stock options is estimated at the grant date based on each option's fair-value as calculated by the Black-Scholes option-pricing model. The Company recognizes compensation cost for stock option grants on a straight-line basis over the requisite service period for the entire award.
Stock-based compensation cost for restricted stock units (RSUs) is measured based on the fair value of the underlying shares on the date of grant. All RSUs are subject to a time-based vesting condition and some are also subject to a performance-based vesting condition, both of which must be satisfied before the RSUs are vested and settled for shares of common stock. The time-based vesting condition is generally 4 years. The Company recognizes the compensation cost for RSUs which contain performance conditions based upon the probability of that performance condition being met, over the respective time-based vesting period. RSUs that do not satisfy the time-based vesting condition as of termination of employment are automatically forfeited. All RSUs will expire 7 years from the grant date if not previously settled for shares of common stock.
Income Taxes
The provision for income taxes is computed using the asset and liability method, under which deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the financial reporting and tax bases of assets and liabilities, and for operating losses and tax credit carryforwards. Deferred tax assets and liabilities are measured using the currently enacted tax rates that apply to taxable income in effect for the years in which those tax assets are expected to be realized or settled. The Company records a valuation allowance to reduce deferred tax assets to the amount that is believed more likely than not to be realized.
Compliance with income tax regulations requires the Company to make decisions relating to the transfer pricing of revenue and expenses between each of its legal entities that are located in several countries. The Company's determinations include many decisions based on management's knowledge of the underlying assets of the business, the legal ownership of these assets, and the ultimate transactions conducted with customers and other third parties. The calculation of the Company's tax liabilities involves dealing with uncertainties in the application of complex tax regulations in multiple tax jurisdictions. The Company may be periodically reviewed by domestic and foreign tax authorities regarding the amount of taxes due. These reviews may include questions regarding the timing and amount of deductions and the allocation of income among various tax jurisdictions. In evaluating the exposure associated with various filing positions, the Company records estimated reserves when it is more likely than not that an uncertain tax position will not be sustained upon examination by a taxing authority. Such estimates are subject to change. See Note 11, "Income Taxes".
Net Loss per Share Attributable to Common Stockholders
Basic and diluted net loss per share of common stock is presented in conformity with the two-class method required for participating securities for 2014, 2013 and 2012. The Company considers the shares issued upon the early exercise of stock options subject to repurchase to be participating securities, because holders of such shares have dividend rights in the event a dividend is paid on common stock. Prior to its conversation to common stock, holders of Series A, B, C, D, E, F and G convertible preferred stock were each entitled to receive noncumulative dividends out of any funds legally available, when, as and if declared by the board of directors, payable prior and in preference to any dividends on any shares of the Company's common stock. The dividend rates for Series A, B, C, D, E, F and G convertible preferred stock were $0.08, $0.12, $0.20, $0.379, $0.5326, $1.056 and $1.168 per share, respectively. In the event a dividend is paid to common stockholders, the holders of the Series A, B, C, D, E, F and G convertible preferred stock were entitled to a proportionate share of any such dividends as if they were holders of common stock (on an as-if converted basis).
Under the two-class method, net income (loss) attributable to common stockholders is determined by allocating undistributed earnings, calculated as net income less current period convertible preferred stock non-cumulative dividends, between common stock and preferred stock. In computing diluted net income (loss) attributable to common stockholders, undistributed earnings are re-allocated to reflect the potential impact of dilutive securities. Basic net income (loss) per share of common stock is computed by dividing the net income (loss) attributable to common stockholders by the weighted average number of common shares outstanding during the period. Unvested common shares resulting from the early exercises of stock options are excluded from the calculation of the weighted average common shares until they vest as they are subject to repurchase until they are vested. Those shares are added to the calculation of the weighted average common shares outstanding as they vest. Diluted net income per share attributable to common stockholders is computed by dividing net income attributable to common stockholders by the weighted average number of common shares outstanding, including potential dilutive common shares assuming the dilutive effect of potential common shares for the period determined using the treasury stock method. For purposes of this calculation, convertible preferred stock, options to purchase common stock and restricted stock units are considered to be potential dilutive common shares, but have been excluded from the calculation of diluted net loss per share of common stock as their effect is antidilutive for all periods presented. Holders of convertible preferred stock and holders of stock subject to repurchase did not have a contractual obligation to share in the losses of the Company.
Given the Company is in a loss position for all periods presented, the Company has not allocated losses to early exercise shares subject to repurchase or series of convertible preferred stock.
Recently Issued Accounting Pronouncements
In July 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2013-11, Income Taxes (Topic 740)—Presentation of an unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This amendment clarifies the guidance on the presentation of an unrecognized tax benefit, or a portion of an unrecognized tax benefit, in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The adoption of this update in the first quarter of 2014 did not have a material impact to the consolidated financial position, results of operations, or cash flows.
In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. ASU 2014-09 also specifies the accounting for some costs to obtain or fulfill a contract with a customer. The new standard is effective for the Company on January 1, 2017. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.

Acquisition

Acquisition	12 Months Ended
	Dec. 31, 2014
Acquisition
Acquisition	2. Business Combinations
	Fiscal 2014
	On December 22, 2014 the Company completed an acquisition. Consideration totaled approximately $5.0 million and consisted of 141,074 shares of common stock of the Company valued at the closing market price of $33.71 and $0.2 million of cash. The Company has included the financial results of this company in its consolidated financial statements from the closing date of the acquisition. The Company has accounted for this transaction as a business combination. Based on the preliminary purchase price allocation, the Company recorded $1.6 million of acquired intangible assets with a useful life of three years, $3.2 million in goodwill, $0.5 million in net tangible assets including cash and $0.3 million of deferred tax liabilities. Additionally, the Company granted 146,762 time-based RSUs and 42,932 performance-based RSUs, which were valued at approximately $6.4 million on the grant date. See Note 9, "Stockholder's Equity and Stock Based Compensation" for more details regarding the performance-based RSUs.
	Pro forma results of operations have not been presented because the effect of this acquisition was not material to the consolidated financial statements.
	Fiscal 2013
	Insightera
	On December 19, 2013, the Company completed its acquisition of Insightera Ltd. (Insightera), a company organized under the laws of the State of Israel. Insightera, a SaaS company, provides a platform that allows its customers to track and compile data about users visiting their internet websites with the purpose of displaying the website information which is personalized in response to the data.
	As a result of the acquisition, the Company acquired all of the issued and outstanding shares of Insightera, and Insightera became a wholly owned subsidiary of the Company. Consideration consisted of $9.8 million of cash and 427,761 shares of common stock of the Company valued at the closing market price of $32.89. Of the issuable shares, 137,252 shares of the Company's common stock are held in escrow and are expected to be released from escrow no later than 18 months from the closing of the acquisition. Additionally, these employees were also granted 139,464 RSUs valued at approximately $6.1 million in January 2014.
	The acquisition was accounted for using the acquisition method of accounting under which assets and liabilities of Insightera were recorded at their respective fair values including an amount for goodwill representing the difference between the acquisition consideration and the fair value of the identifiable net assets.
	During fiscal 2013, the Company incurred $0.7 million in transaction costs related to the acquisition, which primarily consisted of legal, accounting and valuation-related expenses. These expenses were recorded in general and administrative expense in the accompanying Consolidated Statements of Operations and Comprehensive Loss. Additionally, the Company incurred approximately $0.2 million in costs associated with registering the common stock issued in connection with the acquisition. These costs have been recorded as a reduction in additional paid in capital.
	The total purchase price was allocated to the tangible and identified intangible assets acquired and liabilities assumed as of the closing date of the acquisition based upon their respective fair values. The purchase price allocation is as follows:
		Purchase Price
		Allocation
		(in thousands)
	Tangible assets:
	Cash and cash equivalents	$	3,624
	Accounts receivable		46
	Other current assts		60
	Property and equipment		71
	Other assets		13
	Total tangible assets		3,814
	Liabilities assumed:
	Accounts payable and accrued liabilities		(391	)
	Deferred revenues		(116	)
	Other long-term liabilities		(27	)
	Total liabilities assumed		(534	)
	Deferred tax liability		(374	)
	Intangible assets		4,600
	Goodwill		16,404
	Total purchase price	$	23,910
	Each component of identifiable intangible assets acquired in connection with the above acquisition is as follows:
		Estimated			Amount
		Useful Life
		(in years)			(in thousands)
	Developed technology		4		$	3,650
	Domain names		3			250
	Customer relationships		3			700
	Total intangible assets				$	4,600
	Pro forma results of operations have not been presented because the effect of this acquisition was not material to the consolidated financial statements.

Joint_Venture

Joint Venture	12 Months Ended
	Dec. 31, 2014
Joint Venture
Joint Venture	3. Joint Venture
	On February 19, 2014, the Company entered into an agreement with SunBridge Corporation and Dentsu eMarketing One K.K. (collectively, the Investors) to engage in the investment, organization, management and operation of a Japanese subsidiary (Marketo KK) of the Company that is focused on the sale of the Company's products and services in Japan. The Investors contributed approximately $2.0 million (200,000,000 Japanese Yen) in cash in exchange for 35.4% of the outstanding common stock of Marketo KK. As of December 31, 2014, the Company owned approximately 64.6% of the outstanding common stock of Marketo KK. Furthermore, the Company and the Investors have agreed to subscribe to additional shares by contributing additional funding of approximately $2.0 million (237,480,955 Japanese Yen) and approximately $1.7 million (200,000,000 Japanese Yen), respectively, on or before April 1, 2015, at which point the Company and the Investors would own approximately 60.1% and 39.9% of the outstanding common stock in Marketo KK, respectively.
	Twenty percent of the common stock held by the Investors may be callable by the Company or puttable by the Investors beginning on the seventh anniversary of the initial capital contribution by the Investors. This percentage increases to forty percent and one hundred percent on the eighth and tenth anniversary, respectively. Should the call or put option be exercised, the redemption value would be determined based on a prescribed formula derived from the relative revenues of Marketo KK and the Company and may be settled, at the Company's discretion, with Company stock (with no limit on the shares that may be issued) or cash. Additionally, the common stock held by the Investors may be callable or puttable following a change of control of the Company. The redeemable non-controlling interests in Marketo KK is classified outside of permanent equity in the Company's consolidated balance sheet as of December 31, 2014, primarily due to the put right available to the redeemable non-controlling interest holders in the future which may be settled in cash or common stock of the Company. The balance of the redeemable non-controlling interests is reported at the greater of the initial carrying amount adjusted for the redeemable non-controlling interest's share of earnings and other comprehensive income, or its estimated redemption value. The resulting changes in the estimated redemption amount (increases or decreases) are recorded with corresponding adjustments against retained earnings or, in the absence of retained earnings, additional paid-in-capital. The estimated redemption value of the call/put option embedded in the redeemable non-controlling interests was approximately $0.7 million at December 31, 2014.
	The following table summarizes the activity in the redeemable non-controlling interests for the period indicated below:
		Redeemable
		Non-controlling
		Interests
		(in thousands)
	Balance as of December 31, 2013	$	—
	Investment by redeemable non-controlling interests		1,585
	Net loss attributable to redeemable non-controlling interest		(618	)
	Foreign currency translation adjustments		(167	)
	Balance as of December 31, 2014	$	800

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2014
Fair Value of Financial Instruments
Fair Value of Financial Instruments	4. Fair Value of Financial Instruments
	The Company measures certain financial assets at fair value. Fair value is determined based upon the exit price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants, as determined by either the principal market or the most advantageous market. Inputs used in the valuation techniques to derive fair values are classified based on a three-level hierarchy, as follows:
	•	Level 1—Quoted prices in active markets for identical assets or liabilities.
	•	Level 2—Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets with insufficient volume or infrequent transactions (less active markets); or model- derived valuations in which all significant inputs are observable or can be derived principally from or corroborated by observable market data for substantially the full term of the assets or liabilities.
	•	Level 3—Unobservable inputs to the valuation methodology that are significant to the measurement of fair value of assets or liabilities.
	The Company considers all highly liquid investments purchased with a remaining maturity of three months or less to be cash equivalents.
	For certain other financial instruments, including accounts receivable, accounts payable and other current liabilities, the carrying amounts approximate their fair value due to the relatively short maturity of these balances.
	As of December 31, 2014 and 2013, financial assets stated at fair value on a recurring basis were comprised of money market funds and certificates of deposit included within cash and equivalents. In general, and where applicable, the Company uses quoted prices in active markets for identical assets or liabilities to determine fair value. The Company applied this valuation technique to measure the fair value of the Company's Level 1 investments, such as money market funds. The fair value of the Company's investments in certain money market funds is their carrying value. Money market funds consist of cash equivalents with remaining maturities of three months or less at the date of purchase.
	If quoted prices in active markets for identical assets or liabilities are not available to determine fair value, then the Company uses quoted prices for similar assets and liabilities or inputs other than the quoted prices that are observable either directly or indirectly. The Company classifies its certificates of deposit as having Level 2 inputs. The Company obtains the fair value of Level 2 financial instruments from its bank, which uses pricing data which may include quoted market prices for identical or comparable instruments, or inputs other than quoted prices that are observable either directly or indirectly. The bank then analyzes gathered pricing inputs and applies proprietary valuation techniques, such as weighted average pricing or pricing models such as discounted cash flow techniques to provide the Company with a fair valuation of each security.
	The fair value of these financial assets was determined using the following inputs for the periods presented:
			December 31, 2014						December 31, 2013
			Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
			(in thousands)
	Money market funds		$	104,021	$	—	$	—	$	121,466	$	—	$	—
	Certificates of deposit			—		25		—		—		3,219
	Total		$	104,021	$	25	$	—	$	121,466	$	3,219	$	—

Balance_Sheet_Components

Balance Sheet Components	12 Months Ended
	Dec. 31, 2014
Balance Sheet Components
Balance Sheet Components	5. Balance Sheet Components
	Cash and Cash Equivalents
	Cash and cash equivalents consist of the following:
		December 31,
		2014			2013
		(in thousands)
	Cash	$	8,598		$	3,614
	Cash equivalents
	Money market funds		104,021			121,466
	Certificates of deposit		25			3,219
			104,046			124,685
	Total	$	112,644		$	128,299
	Cash and cash equivalents are classified as current assets on the consolidated balance sheets.
	Property and Equipment, Net
	Property and equipment, net consists of the following:
		December 31,
		2014			2013
		(in thousands)
	Computer equipment	$	18,384		$	12,919
	Software		2,417			2,314
	Office furniture		2,071			1,318
	Leasehold improvements		5,123			2,993
	Construction in progress		1,745			51
	Total property and equipment		29,740			19,595
	Less accumulated depreciation		(12,908	)		(5,739	)
	Property and equipment, net	$	16,832		$	13,856
	Depreciation expense was $7.2 million, $3.9 million and $1.2 million for 2014, 2013 and 2012, respectively.
	Accrued Expenses and Other Current Liabilities
	Accrued expenses and other current liabilities are as follows:
		December 31,
		2014			2013
		(in thousands)
	Accrued bonuses, commissions and wages	$	10,553		$	12,321
	Accrued ESPP		2,324			3,278
	Accrued vacation		2,972			2,202
	Accrued marketing expenses		1,313			1,062
	Accrued other		3,529			4,192
	Total	$	20,691		$	23,055
	Changes in Accumulated Other Comprehensive Income
	Changes in accumulated other comprehensive income are as follows:
		Foreign			Total
		Currency
		Translation
		Adjustments
		(in thousands)
	Balance at December 31, 2012	$	145		$	145
	Other comprehensive income before reclassfications		53			53
	Amounts reclassified from accumulated other comprehensive income		—			—
	Balance at December 31, 2013		198			198
	Other comprehensive income before reclassfications		(548	)		(548	)
	Amounts reclassified from accumulated other comprehensive income		—			—
	Balance at December 31, 2014	$	(350	)	$	(350	)

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets
Goodwill and Intangible Assets	6. Goodwill and Intangible Assets
	Goodwill and intangible assets consisted of the following for the periods presented below:
		December 31, 2014			Weighted		December 31, 2013			Weighted
		(in thousands)			Average		(in thousands)			Average
					Remaining					Remaining
					Useful Life					Useful Life
					(in years)					(in years)
	Developed technology	$	6,050			2.9	$	4,950			3.9
	Domain names		950			3.6		950			4.5
	Customer relationships		1,600			1.6		1,600			4.9
	Non-compete agreements		580			3		130			0.3
	Capitalized software development costs		2,042			1.2		1,355			1.3
			11,222					8,985
	Less accumulated amortization		(4,146	)				(1,890	)
	Intangible assets, net		7,076					7,095
	Goodwill		29,201					25,941
	Goodwill and intangible assets, net	$	36,277				$	33,036
	The Company capitalized approximately $688,000 and $478,000 of software development costs in 2014 and 2013, respectively.
	Amortization expense for the periods presented below was as follows:
		Year Ended December 31,
		2014			2013		2012
		(in thousands)
	Amortization expense	$	2,256		$	717	$	540
	Based on the carrying amount of intangible assets as of December 31, 2014, the estimated future amortization is as follows:
		Year Ended December 31,
		2015			2016		2017			2018		2019		Total
		(in thousands)
	Developed Technology	$	1,508		$	1,508	$	1,406		$	—	$	—	$	4,422
	Domain Names		183			180		100			100		29		592
	Customer Relationships		547			315		—			—		—		862
	Non-compete Agreements		150			150		144			—		—		444
	Capitalized Software Development Costs		612			144		—			—		—		756
	Total	$	3,000		$	2,297	$	1,650		$	100	$	29	$	7,076

Credit_Facility

Credit Facility	12 Months Ended
	Dec. 31, 2014
Credit Facility
Credit Facility	7. Credit Facility
	In May 2012, the Company entered into a loan and security agreement with a bank related to an equipment facility providing the Company with an equipment line of up to $4.0 million (Original Line of Credit). On June 6, 2013, the Company entered into a first amendment to the loan and security agreement, which provided an additional line of credit for advances of up to an aggregate of $4.5 million (New Line of Credit). The interest rate associated with the Original Line of Credit and New Line of Credit is the greater of 4% or 0.75 of a percentage point above the prime rate, as determined on the applicable funding date. For each equipment advance, the Company will pay interest only for approximately nine months. Subsequently, the Company will make thirty-six equal monthly payments of principal and interest. The loan is secured by a security interest on substantially all of the Company's assets, including the equipment purchased with the advances, and excludes the Company's intellectual property. The loan and security agreement also contains customary events of default including, among other things, that during the existence of an event of default, interest on the obligations could be increased by 5%.
	In May 2014, the Company entered into a second amendment to the loan and security agreement to amend various covenants. Under the second amendment the Company is required to maintain compliance with certain financial covenants, which include maintaining a minimum cash balance with the bank and various reporting covenants. As of December 31, 2014, the Company was in compliance with these covenants.
	As of December 31, 2014, the outstanding loan balance was $5.4 million.
	Contractual future repayments in relation to the above credit facility are as follows for the years ending December 31:
		Principal		Interest		Total
		(in thousands)
	2015	$	2,719	$	168	$	2,887
	2016		2,174		62		2,236
	2017		479		4		483
	Total	$	5,372	$	234	$	5,606

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies.
Commitments and Contingencies	8. Commitments and Contingencies
	Leases
	The Company leases its office facilities in San Mateo, California, Portland, Oregon, Atlanta, Georgia, Dublin, Ireland, Sydney, Australia, London, United Kingdom and Petach Tikva, Israel under operating lease agreements expiring in 2019. Under terms of the leases, the Company is responsible for certain insurance, property taxes, and maintenance expenses. Rent expense for non-cancellable operating leases with scheduled rent increases is recognized on a straight line basis over the terms of the leases. The difference between required lease payments and rent expense has been recorded as deferred rent. Deferred rent as of December 31, 2014 and 2013 of $2.6 million and $1.6 million, respectively, are all long-term.
	Rent expense under these operating leases was approximately $4.2 million, $2.7 million and $1.5 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	As of December 31, 2014, the Company had no capital leases. As of December 31, 2014, future minimum operating lease payments are as follows for the years ending December 31:
		Minimum
		Lease Payment
		(in thousands)
	2015	$	5,244
	2016		5,595
	2017		5,742
	2018		4,115
	2019 and Thereafter		385
	Total	$	21,081
	Contractual Obligations and Commitments
	Contractual agreements with third parties consist of co-location hosting services, software licenses, maintenance and support for our operations. As of December 31, 2014, future payments for non-cancellable contractual agreements are $2.4 million, $0.8 million and $0.2 million in 2015, 2016 and 2017, respectively.

Stockholders_Equity_and_Stock_

Stockholder's Equity and Stock Based Compensation	12 Months Ended
	Dec. 31, 2014
Stockholder's Equity and Stock Based Compensation
Stockholder's Equity and Stock Based Compensation	9. Stockholder's Equity and Stock Based Compensation
	Convertible Preferred Stock
	Upon the closing of the IPO on May 17, 2013, all outstanding convertible preferred stock was converted into 25,876,142 shares of common stock on a one-to-one basis. No remaining convertible preferred stock was outstanding as of December 31, 2014.
	Stock Option Plans
	2006 Plan
	The Company's Board of Directors (Board) and the Company's stockholders adopted the 2006 Stock Plan (2006 Plan) in October 2006. The 2006 Plan was most recently amended in May 2013. The 2006 Plan was terminated in connection with the IPO, and accordingly, no shares will be available for issuance under this plan. The 2006 Plan will continue to govern outstanding awards granted thereunder. The 2006 Plan provided for the grant of incentive stock options and nonqualified stock options. As of December 31, 2014, options to purchase 4,340,873 shares of common stock and 23,375 restricted stock units remained outstanding under the 2006 Plan.
	2013 Equity Incentive Plan
	The Board adopted, and the Company's stockholders approved, a 2013 Equity Incentive Plan (2013 Plan). The 2013 Plan was effective May 16, 2013. The 2013 Plan provides for the grant of incentive stock options, to the Company's employees and any parent and subsidiary corporations' employees, and for the grant of nonstatutory stock options, restricted stock, restricted stock units, stock appreciation rights, performance units and performance shares to the Company's employees, directors and consultants and the Company's subsidiary corporations' employees and consultants. In addition, the shares reserved for issuance under the 2013 Plan also include (a) those shares reserved but unissued under the 2006 Stock Plan (2006 Plan), and (b) shares returned to the 2006 Plan as the result of expiration or termination of awards (provided that the maximum number of shares that may be added to the 2013 Plan pursuant to (a) and (b) is 9,119,341 shares). The number of shares available for issuance under the 2013 Plan will also include an annual increase on the first day of each fiscal year beginning in 2014, equal to the least of:
	•	3,250,000 shares;
	•	5% of the outstanding shares of common stock as of the last day of the Company's immediately preceding fiscal year; or
	•	such other amount as the Company's Board of Directors may determine.
	If an award expires or becomes unexercisable without having been exercised in full, is surrendered pursuant to an exchange program, or, with respect to restricted stock, restricted stock units, performance units or performance shares, is forfeited to or repurchased due to failure to vest, the unpurchased shares (or for awards other than stock options or stock appreciation rights, the forfeited or repurchased shares) will become available for future grant or sale under the 2013 Plan. With respect to stock appreciation rights, the net shares issued will cease to be available under the 2013 Plan and all remaining shares will remain available for future grant or sale under the 2013 Plan. Shares used to pay the exercise price of an award or satisfy the tax withholding obligations related to an award will become available for future grant or sale under the 2013 Plan. To the extent an award is paid out in cash rather than shares, such cash payment will not result in reducing the number of shares available for issuance under the 2013 Plan. Options under the 2013 Plan may be exercised for periods of up to ten years from the grant date.
	Summary of Stock Option Activity
	A summary of the Company's stock option activity for all stock option plans for fiscal 2014 is as follows:
			Number of			Weighted-			Weighted-			Aggregate
			Stock			Average			Average			Intrinsic
			Options			Exercise			Remaining			Value
			Outstanding			Price			Contractual			(in thousands)
			(in thousands)						Life
									(in years)
	Balance as of December 31, 2013			6,343		$	5.33			7.98		$	201,305
	Granted			1,016			38.48
	Exercised			(1,534	)		3.62
	Options Cancelled/Forfeited			(421	)		11.78
	Balance as of December 31, 2014			5,404			11.55			7.56		$	120,594
	Exercisable as of December 31, 2014			4,292		$	5.34			7.2		$	117,520
	Vested and expected to vest as of December 31, 2014			5,038		$	11.04			7.5		$	114,637
	The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the Company's closing price of $32.72 and $37.07 as of December 31, 2014 and 2013, respectively, for options that were in-the-money as of that date.
	Option awards generally vest over a four year period, with 25% vesting after one year from date of grant and monthly thereafter. Stock options granted under our 2006 Plan provided employee option holders with an early exercise provision, where in the event of termination any unvested shares purchased are subject to repurchase by the Company at the original purchase price. This right of repurchase lapses as the option vests. Options exercisable as of December 31, 2014 include options that are exercisable prior to vesting.
	The weighted average grant date fair value of options granted and the total intrinsic value of options exercised during the periods presented were as follows:
			Year Ended December 31,
			2014			2013			2012
	Weighted average grant date fair value		$	20.72		$	5.08		$	2.69
	Total intrinsic value of options exercised (in thousands)		$	47,273		$	38,241		$	948
	The total estimated grant date fair value of options vested during the years ended December 31, 2014, 2013 and 2012 was $5.2 million, $4.2 million and $3.1 million, respectively.
	Additional information regarding options outstanding as of December 31, 2014 is as follows:
			Range of						Shares			Weighted		Weighted		Shares		Weighted
			Exercise Prices						Outstanding			Average		Average		Exercisable		Average
									(in thousands)			Remaining		Exercise		(in thousands)		Exercise
												Contractual		Price				Price
												Term
												(in years)
			$	0.12		$	1.50			579			4.97	$	1.04		579	$	1.04
				2.38			4.24			785			6.56		3.04		761		3.00
				4.56			4.56			1,003			7.33		4.56		949		4.56
				4.74			5.44			351			7.45		4.78		351		4.78
				7.42			7.42			1,396			8.10		7.42		1,396		7.42
				9.24			32.65			484			8.86		21.20		233		12.54
				32.99			32.99			85			8.87		32.99		23		32.99
				40.50			40.50			265			9.07		40.50		—		—
				41.40			41.40			158			9.08		41.40		—		—
				41.91			41.91			298			9.07		41.91		—		—
				0.12			41.91			5,404			7.56		11.55		4,292		5.34
	Determining Fair Value of Stock Options
	The fair value of each option grant is estimated on the date of grant using the Black-Scholes option valuation model. The following assumptions were used to estimate the fair value of options granted to employees:
			Year Ended December 31,
			2014		2013		2012
	Expected term (in years)		6		6		6
	Risk-free interest rate		1.80% - 1.97%		0.86% - 1.78%		1.02%
	Expected volatility		49% - 56%		57% - 58%		65%
	Expected dividend rate		0%		0%		0%
	The assumptions are based on the following for each of the periods presented:
	Expected Term—The Company estimates the expected term consistent with the simplified method identified by the SEC. The Company elected to use the simplified method because of its limited history of stock option exercise activity and its stock options meet the criteria of the "plain-vanilla" options as defined by the SEC. The simplified method calculates the expected term as the average of the vesting and contractual terms of the award.
	Volatility—Since the Company has limited trading history by which to determine the volatility of its own common stock price, the expected volatility being used is derived from the historical stock volatilities of a representative industry peer group of comparable publicly listed companies over a period approximately equal to the expected term of the options.
Risk Free Interest Rate—The risk free interest rate is based on U.S. Treasury zero coupon issues with remaining terms similar to the expected term on the options.
Expected Dividend—The Company has never declared or paid any cash dividends and does not plan to pay cash dividends in the foreseeable future, and, therefore, used an expected dividend yield of zero in the valuation model.
Forfeiture—The Company estimates forfeitures at the time of grant and revises those estimates in subsequent periods if actual forfeitures differ from those estimates. The Company uses historical data to estimate pre-vesting forfeitures and records stock-based compensation expense only for those awards that are expected to vest. All service based stock-based payment awards are amortized on a straight-line basis over the requisite service periods of the awards, which are generally the vesting periods.
Restricted Stock Units
A summary of the Company's RSU activity and related information for fiscal 2014 is as follows:
		Number of			Weighted			Aggregate
		RSUs			Average			Intrinsic
		(in thousands)			Grant Date			Value
					Fair Value			(in thousands)
Balance as of December 31, 2013			582		$	22.57		$	21,579
RSUs Granted			2,213			34.27
RSUs Vested			(234	)		15.6
RSUs Cancelled/Forfeited			(201	)		33.54
Balance as of December 31, 2014			2,360		$	33.3		$	77,207
The aggregate intrinsic value of RSUs outstanding was determined using the Company's closing stock price of $32.72 and $37.07 as of December 31, 2014 and 2013, respectively.
During 2013 and 2012 the Company granted performance-based RSUs to certain employees. These RSUs were subject to a time-based vesting condition and a performance-based vesting condition, both of which must be satisfied before the RSUs are vested and settled for shares of common stock. The time-based vesting condition generally ranges from 2 to 4 years. The performance-based vesting condition was satisfied upon the completion of the Company's IPO, which occurred during the second quarter of 2013.
During 2014, in connection with an acquisition, the Company issued 42,932 performance-based RSUs to certain employees. These performance-based RSUs will vest based on the achievement against two product milestones. Of the total performance-based RSUs granted, 40% of the total RSUs granted will be subject to the first milestone (expected to occur in the second quarter of 2015) and 60% of the total RSUs granted will be subject to the second milestone (expected to occur in the fourth quarter of 2015). The RSUs had an estimated value of $1.4 million on the date of grant. The Company currently estimates that the performance-based milestones will be achieved and as a result, the full grant date fair value of these RSUs are being accounted for as compensation expense over the vesting periods.
The weighted average grant date fair value of RSUs granted and the total intrinsic value of RSUs that vested during the periods presented were as follows:
		Year Ended December 31,
		2014			2013			2012
Weighted average grant date fair value		$	34.27		$	28.69		$	4.58
Total intrinsic value of vested RSUs (in thousands)		$	7,117		$	2,479		$	—
The aggregate grant date fair value of RSUs vested during fiscal 2014 was approximately $3.7 million.
Employee Stock Purchase Plan
The Board adopted, and the Company's stockholders approved, a 2013 Employee Stock Purchase Plan (ESPP). The ESPP became effective on May 1, 2013. The ESPP provides for annual increases in the number of shares available for issuance under the ESPP on the first day of each fiscal year beginning in fiscal 2014, equal to the lesser of:
•	1% of the outstanding shares of our common stock on the first day of such fiscal year;
•	650,000 shares; or
•	such other amount as may be determined by our board of directors
The ESPP allows eligible employees to purchase shares of our common stock at a discount through payroll deductions of up to 15% of their eligible compensation, at not less than 85% of the fair market value, as defined in the ESPP, subject to any plan limitations. A participant may purchase a maximum of 1,250 shares during an offering period. The offering period generally start on the first trading day on or after February 15th and August 15th of each year, except that the first offering period commenced on the first trading day following the effective date of the Company's registration statement. At December 31, 2014, 709,031 shares were available for issuance under the ESPP.
Determining Fair Value of Employee Stock Plan Purchase Rights
The assumptions used to value employee stock purchase rights under the Black-Scholes model for the periods presented were as follows:
		Year Ended December 31,
		2014		2013		2012
Expected term (in months)		6 - 9		9		N/A
Risk-free interest rate		0.05% - 0.11%		0.11%		N/A
Expected volatility		41% - 43%		42%		N/A
Expected dividend rate		0%		0%		N/A
Awards Available for Grant
The equity awards available for grant for the periods presented were as follows:
		Fiscal Year
		2014			2013			2012
		(in thousands)
Available at beginning of year			3,486			928			1,777
Additional shares authorized			1,962			4,502			1,875
Options granted			(1,016	)		(2,225	)		(3,365	)
Assumed option grants			—			—			(90	)
Options repurchased			13			13			32
Withholding taxes for the net share settlement of equity awards			87			5			—
Options cancelled/forfeited			421			685			1,027
RSUs granted			(2,213	)		(474	)		(328	)
RSUs cancelled/forfeited			201			52			—
Available at end of year			2,941			3,486			928
Stock Compensation Expense
The stock-based compensation expense included in operating results for the periods presented was allocated as follows:
		Year Ended December 31,
		2014			2013			2012
		(in thousands)
Cost of subscription and support revenue		$	1,626		$	496		$	216
Cost of professional services and other revenue			2,363			690			169
Research and development			5,353			2,084			575
Sales and marketing			8,860			2,293			966
General and administrative			6,918			2,512			1,046
Total stock-based compensation expense		$	25,120		$	8,075		$	2,972
For the year ended December 31, 2014, the Company incurred expenses of $9.2 million for options, $14.0 million for RSUs and $1.9 million for ESPP. Additionally, amounts for fiscal 2014 include stock compensation expense of $0.1 million related to performance-based RSUs that are tied to product milestones as discussed above.
Amounts for fiscal 2014 and 2013 include stock compensation expense of $0.2 million and $1.3 million, respectively, related to RSUs granted whereby the performance condition for these grants were satisfied upon the Company's IPO closing.
As of December 31, 2014, total unrecognized compensation cost related to unvested awards not yet recognized under all equity compensation plans, adjusted for estimate forfeitures, was as follows:
		December 31, 2014
		Unrecognized			Weighted Average
		Expense			Expected
					Recognition Period
		(in thousands)			(in years)
Stock options		$	19,434			2.16
Restricted stock units			52,994			3.11
Employee stock purchase plan			226			0.13
Total unrecognized stock-based compensation expense		$	72,654			2.84

Net_Loss_per_Share

Net Loss per Share	12 Months Ended
	Dec. 31, 2014
Net Loss per Share
Net Loss per Share	10. Net Loss per Share
	Basic net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period, less the weighted-average unvested common stock subject to repurchase or forfeiture as they are not deemed to be issued for accounting purposes. Diluted net loss per share is computed by giving effect to all potential shares of common stock, including preferred stock, stock options, RSUs and employee stock purchase plan, to the extent they are dilutive.
	The following table sets forth the computation of the Company's basic and diluted net loss per share of common stock under the two-class method attributable to common stockholders for the periods presented:
		Year Ended December 31,
		2014			2013			2012
		(in thousands, except per share data)
	Numerator:
	Net loss attributable to Marketo	$	(54,337	)	$	(47,360	)	$	(34,385	)
	Denominator:
	Weighted-average common shares outstanding		40,602			24,881			2,934
	Less: Weighted-average unvested common shares subject to repurchase or forfeiture and shares held in escrow		(217	)		(172	)		(128	)
	Weighted-average shares used in computing net loss per share of common stock, basic and diluted		40,385			24,709			2,806
	Net loss per share of common stock, basic and diluted	$	(1.35	)	$	(1.92	)	$	(12.26	)
	The Company applied the two-class method to calculate its basic and diluted net loss per share of common stock, as its convertible preferred stock and common stock subject to repurchase are participating securities. The two-class method is an earnings allocation formula that treats a participating security as having rights to earnings that otherwise would have been available to common shareholders. However, the two-class method does not impact the net loss per share of common stock as the Company was in a loss position for each of the periods presented and preferred shareholders and holders of common stock subject to repurchase do not have to participate in losses.
	Additionally, since the Company was in a loss position for each of the periods presented, diluted net loss per share is the same as basic net loss per share for each periods as the inclusion of all potential common shares outstanding would have been anti-dilutive. Potentially dilutive securities that were excluded from the diluted per share calculation because they would have been antidilutive were as follows:
		Year Ended December 31,
		2014			2013			2012
		(in thousands)
	Convertible preferred stock		—			—			25,876
	Stock options to purchase common stock		5,404			6,343			6,581
	Common stock held in escrow		159			137			12
	Common stock subject to repurchase		50			127			148
	Employee stock purchase plan		125			304			—
	Restricted stock units		2,360			582			328
			8,098			7,493			32,946

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Taxes
Income Taxes	11. Income Taxes
	Income Tax Provision:
	Pretax loss was as follows:
		Year Ended December 31,
		2014			2013			2012
		(in thousands)
	Loss before provision for income taxes:
	Domestic	$	(46,908	)	$	(37,481	)	$	(29,119	)
	Foreign		(8,524	)		(9,851	)		(5,247	)
	Total	$	(55,432	)	$	(47,332	)	$	(34,366	)
	The provision (benefit) for income taxes consists of the following:
		Year Ended
		December 31,
		2014			2013			2012
		(in thousands)
	Current tax provision:
	Federal	$	1		$	—		$	—
	State		15			10			3
	Foreign		164			83			16
	Total current tax provision		180			93			19
	Federal		(286	)		—			—
	State		(45	)		—			—
	Foreign		(326	)		(65	)		—
	Total deferred tax benefit		(657	)		(65	)		—
	Total provision (benefit) for income taxes	$	(477	)	$	28		$	19
	The items accounting for the difference between income taxes computed at the federal statutory rate and the provision for income taxes consist of the following:
		Year Ended December 31,
		2014			2013			2012
	Federal statutory rate		34	%		34	%		34	%
	Stock-based compensation		(0.74	)		(1.59	)		(1.54	)
	Valuation allowance		(34.38	)		(28.31	)		(26.85	)
	Foreign rate differential		(2.52	)		(5.00	)		(5.24	)
	Federal research and development credit		2.48			1.19			—
	Other		2.03			(0.35	)		(0.43	)
	Effective income tax rate		0.87	%		(–0.06	)%		(–0.06	)%
	Deferred tax assets and liabilities:
	The components of deferred tax assets and liabilities are as follows:
		Year Ended December 31,
		2014			2013			2012
		(in thousands)
	Deferred tax assets:
	Accounts receivable principally due to allowance for doubtful accounts	$	130		$	92		$	107
	Compensated absences, principally due to accruals for financial reporting purposes		1,867			2,993			1,604
	Net operating loss carryforwards		54,949			42,704			30,251
	Federal tax credits		2,437			1,766			783
	State tax credits net of federal benefit		1,521			1,166			771
	Other deductible temporary differences		1,311			964			521
	Stock-based compensation		7,289			1,508			792
	Foreign Credit		24			25			—
	Total deferred tax assets		69,528			51,218			34,829
	Deferred tax liabilities:
	Capitalized software development		(278	)		(149	)		(37	)
	Acquired intangible assets		(1,983	)		(1,979	)		(964	)
	Total deferred tax liability		(2,261	)		(2,128	)		(1,001	)
	Valuation allowance		(67,159	)		(49,388	)		(33,828	)
	Net deferred taxes	$	108		$	(298	)	$	—
	The current and noncurrent portion of the net deferred tax asset is presented in the balance sheet within prepaid expenses and other current assets and other assets, respectively. The long term portion of the net deferred tax liability is presented in the balance sheet within other liabilities.
	The net valuation allowance increased by $17.8 million and $15.6 million for the years ended December 31, 2014 and 2013, respectively.
	As of December 31, 2014, the Company's deferred tax assets were generated primarily from the federal and state net operating loss, stock based compensation and research and development credit. In assessing the realizability of deferred tax assets, management determined that it is more likely than not that none of the deferred tax assets will be realized in the U.S., Ireland and Japan. Therefore, the Company has provided a full valuation allowance against the U.S. federal, state, Ireland and Japan deferred tax assets at December 31, 2014, 2013 and 2012.
	The Company has not provided for withholding taxes on the undistributed earnings of its foreign subsidiaries because the Company intends to reinvest such earnings indefinitely. As of December 31, 2014, the amount of undistributed earnings considered indefinitely reinvested was not material.
	The Company had net operating loss carryforwards as follows:
		Year Ended December 31,
		2014			2013			2012
		(in thousands)
Federal	$	204,361		$	130,797		$	73,491
California		146,399			102,606			68,906
Foreign		24,780			17,673			6,791
Total	$	375,540		$	251,076		$	149,188
The federal and state net operating losses include $72.0 million and $37.4 million of excess stock-based compensation that will result in increases to additional paid in capital, when realized.
Net operating loss carryforwards are available to offset future federal, California and foreign taxable income. Federal and California net operating loss carryforwards begin to expire in 2026 and 2016, respectively. Foreign net operating loss carryforwards do not expire.
The Company had research and development credit carryforwards as follows:
	Year Ended December 31,
	2014			2013			2012
	(in thousands)
Federal	$	2,437		$	1,766		$	783
California		2,305			1,767			1,169
International		24			25			—
Total	$	4,766		$	3,558		$	1,952
Federal and California research and development tax credit carryforwards are available to reduce future regular income taxes. Federal research and development credit carryforwards begin to expire in 2026. California research and development tax credit carryforwards do not expire.
On December 19, 2014, the President signed into law The Tax Increase Prevention Act of 2014, which retroactively extends more than 50 expired tax provisions through 2014. Among the extended provisions is the Sec. 41 research credit for qualified research expenditures incurred through the end of 2014. The benefit of the reinstated credit did not impact the income statement in the period of enactment, which was the fourth quarter of 2014, as the research and development credit carryforwards are offset by a full valuation allowance.
Federal and California laws impose restrictions on the utilization of net operating loss carryforwards and R&D credit carryforwards in the event of a change in ownership of the Company, which constitutes an "ownership change" as defined by Internal Revenue Code Sections 382 and 383. The Company experienced an ownership change in the past that does not materially impact the availability of its net operating losses and tax credits. The amounts reflected in the above tables reflect reduction of approximately $1.2 million of net operating losses and $8,000 of research and development credits as a result of previous ownership changes that the Company experienced. Nevertheless, should there be an ownership change in the future, the Company's ability to utilize existing carryforwards could be substantially restricted.
The Company files tax returns in the US, certain states, Israel, Ireland, Australia and Japan. All of the tax years, from the date of inception, are open for examination.
Uncertain Tax Positions
The Company accounts for uncertainty in income taxes in accordance with ASC 740. Tax positions are evaluated in a two-step process. The Company first determines whether it is more likely than not that a tax position will be sustained upon examination by the tax authority, including resolutions of any related appeals or litigation processes, based on technical merit. If a tax position meets the more-likely-than-not recognition threshold it is then measured to determine the amount of benefit to recognize in the financial statements. The tax position is measured as the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement.
The following table summarizes the activity related to unrecognized tax benefits:
	Year Ended
	December 31,
	2014			2013			2012
	(in thousands)
Unrecognized benefit—beginning of period	$	472		$	—		$	—
Gross increases (decreases)—prior period tax positions		34			—			—
Gross increases (decreases)—current period tax positions		485			472			—
Unrecognized benefit—end of period	$	991		$	472		$	—
All of the unrecognized tax benefits as of December 31, 2014 are accounted for as a reduction in the Company's deferred tax assets. Because of the Company's valuation allowance, none of the $991,000 of unrecognized tax benefits would affect the Company's effective tax rate, if recognized.
The Company recognizes interest and penalties related to unrecognized tax benefits as income tax expense. There is no interest or penalties accrued related to unrecognized tax benefits for the 2014, 2013 and 2012 and no liability for accrued interest and penalties related to unrecognized tax benefits as of December 31, 2014.
The Company does not expect any significant change in its unrecognized tax benefits during the next twelve months.

Employee_401k_Plan

Employee 401(k) Plan	12 Months Ended
	Dec. 31, 2014
Employee 401(k) Plan
Employee 401(k) Plan	12. Employee 401(k) Plan
	The Company's employee savings and retirement plan is qualified under Section 401 of the Internal Revenue Code. The plan is available to all regular employees on the Company's U.S. payroll and provides employees with tax-deferred salary deductions and alternative investment options. Employees may contribute up to 90% of their salary up to the statutory prescribed annual limit. In the calendar year 2014, the Company match for employees' contributions to the plan was 25% of the first 6% deferred. The Company's matching contributions to the plan totaled $0.7 million in 2014.

Segment_Information_and_Inform

Segment Information and Information about Geographic Areas	12 Months Ended
	Dec. 31, 2014
Segment Information and Information about Geographic Areas
Segment Information and Information about Geographic Areas	13. Segment Information and Information about Geographic Areas
	The accounting principles guiding disclosures about segments of an enterprise and related information establishes standards for the reporting by business enterprises of information about operating segments, products and services, geographic areas, and major customers. The method of determining which information is reported is based on the way that management organizes the operating segments within the Company for making operational decisions and assessments of financial performance. The Company's chief operating decision maker (the CODM) is considered to be the Company's chief executive officer (CEO). The CODM reviews financial information presented on a consolidated basis for purposes of making operating decisions and assessing financial performance. As such, the Company is determined to be operating in one business segment.
	All of the Company's principal operations and decision-making functions are located in the United States.
	Revenue
	Revenues by geography are based on the shipping address of the customer. The following table presents our revenue by geographic region for the periods presented:
		Year Ended December 31,
		2014			2013			2012
		(in thousands)
	United States	$	125,737		$	82,019		$	50,910
	EMEA		12,772			6,989			3,686
	Other		11,445			6,910			3,817
	Total	$	149,954		$	95,918		$	58,413
	No single customer accounted for more than 10% of our total revenue in 2014, 2013 and 2012. No single customer accounted for more than 10% of accounts receivable as of December 31, 2014 and 2013.
	Long-lived Assets
	The following table sets forth the Company's long-lived assets by geographic areas as of the periods presented:
		Year Ended
		December 31,
		2014			2013
		(in thousands)
	United States	$	16,265		$	13,573
	EMEA		209			280
	Other		358			3
	Total		16,832			13,856
	SUPPLEMENTARY QUARTERLY FINANCIAL DATA (UNAUDITED)
		First Quarter			Second Quarter			Third Quarter			Fourth Quarter
		(in thousands, except per share data)
	Fiscal Year 2014
	Total revenue	$	32,292		$	36,030		$	39,287		$	42,345
	Total gross profit		21,216			23,614			26,062			28,261
	Net loss		(12,520	)		(13,271	)		(13,009	)		(16,155	)
	Net loss attributable to redeemable non-controlling interests		11			159			206			242
	Net loss attributable to Marketo		(12,509	)		(13,112	)		(12,803	)		(15,913	)
	Net loss per share of common stock, basic and diluted	$	(0.32	)	$	(0.33	)	$	(0.31	)	$	(0.39	)
	Fiscal Year 2013
	Total revenue	$	19,736		$	22,504		$	25,507		$	28,171
	Total gross profit		11,298			13,062			15,694			17,885
	Net loss		(9,524	)		(12,390	)		(9,951	)		(15,495	)
	Net loss attributable to redeemable non-controlling interests		—			—			—			—
	Net loss attributable to Marketo		(9,524	)		(12,390	)		(9,951	)		(15,495	)
	Net loss per share of common stock, basic and diluted	$	(2.99	)	$	(0.63	)	$	(0.27	)	$	(0.41	)
	Net loss per share of common stock for the four quarters of each year in the table above may not sum to the total for each year because of the different number of weighted-average shares outstanding in each respective period.

The_Company_and_Summary_of_Sig1

The Company and Summary of Significant Accounting Policies and Estimates (Policies)	12 Months Ended
	Dec. 31, 2014
The Company and Summary of Significant Accounting Policies and Estimates
Principles of Consolidation	Principles of Consolidation
	The consolidated financial statements are prepared in accordance with accounting principles generally accepted in the U.S. (U.S. GAAP) and include the consolidated accounts of the Company and its wholly-owned and majority-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation.
Use of Estimates	Use of Estimates
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Such management estimates and assumptions include the estimated selling price for the various elements in our customer contracts, the allowance for doubtful accounts, stock-based compensation expense, useful lives of intangible assets and the valuation of deferred tax assets and acquired intangible assets. Actual results could differ materially from those estimates, and such differences could be material to the financial statements and affect the results of operations reported in future periods.
Redeemable Non-controlling Interests	Redeemable Non-controlling Interests
	The Company's Japanese subsidiary (Marketo KK) is not wholly owned. The agreements with the minority investors of Marketo KK contain redemption features whereby the interests held by the minority investors are redeemable either (i) at the option of the minority investors or (ii) at the option of the Company beginning on the seventh anniversary of the initial capital contribution. If the interests of the minority investors were to be redeemed under these agreements, the Company would be required to redeem the interest based on a prescribed formula derived from the relative revenues of Marketo KK and the Company. The balance of the redeemable non-controlling interests is reported at the greater of the initial carrying amount adjusted for the redeemable non-controlling interest's share of earnings or losses and other comprehensive income or loss, or its estimated redemption value. The resulting changes in the estimated redemption amount (increases or decreases) are recorded with corresponding adjustments against retained earnings or, in the absence of retained earnings, additional paid-in-capital. These interests are presented on the balance sheet outside of equity under the caption "Redeemable non-controlling interests."
Foreign Currency Translation	Foreign Currency
	The functional currency of the Company's foreign subsidiaries is their respective local currency. Assets and liabilities denominated in currencies other than the U.S. dollar are translated into U.S. dollars at the exchange rates in effect at the balance sheet dates, with the resulting translation adjustments directly recorded to a separate component of accumulated other comprehensive income (loss). Income and expense accounts are translated at average exchange rates during the year. Foreign currency remeasurement and transaction gains and losses are recorded in other income (expense), net. The Company recognized net foreign currency transaction gains of approximately $0.4 million during the year ended December 31, 2014, and net foreign currency transaction losses of $0.3 million and $0.1 million during the years ended December 31, 2013 and 2012, respectively.
Segments	Segments
	The Company's chief operating decision maker is its Chief Executive Officer (CEO), who reviews financial information presented on a consolidated basis, accompanied by information about revenue by geographic region. Accordingly, the Company has determined that it has a single operating segment.
Cash and Cash Equivalents	Cash and Cash Equivalents
	The Company considers all highly liquid investments purchased with original maturity of three months or less to be cash equivalents. Total cash equivalents were $104.0 million and $124.7 million as of December 31, 2014 and 2013, respectively, consisting primarily of money market funds.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts
	Accounts receivable are carried at the original invoiced amount less an allowance made for doubtful accounts. The Company maintains an allowance for doubtful accounts based on the probability of future collection. When management becomes aware of circumstances that may decrease the likelihood of collection, it records a specific allowance against amounts due, which reduces the net receivable to the amount that management reasonably believes will be collected. For all other customers, management determines the adequacy of the allowance based on historical loss patterns, the number of days that billings are past due and an evaluation of the potential risk of loss associated with specific accounts. The Company reviews its allowance for doubtful accounts monthly and writes off receivable balances that are deemed to be uncollectible. Increases in the allowance are recorded in general and administrative expense in the period incurred. The Company does not have any off balance sheet credit exposure related to its customers.
	Below is a summary of the changes in allowance for doubtful accounts for the periods presented:
			Balance at		Provision, net		Write-offs			Balance at
			Beginning of		of Recoveries					End of
			Period							Period
			(in thousands)
	Year ended December 31, 2012		$	225	$	362	$	(251	)	$	336
	Year ended December 31, 2013			336		452		(459	)		329
	Year ended December 31, 2014			329		417		(353	)		393
Property and Equipment	Property and Equipment
	Property and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the asset, which is generally two to three years. Amortization of leasehold improvements is computed using the straight-line method over the shorter of the lease term or the estimated useful life of the asset or improvement. Depreciation and amortization begins when the asset is ready for its intended use. Cost of maintenance and repairs that do not improve or extend the lives of the respective assets are expensed as incurred.
Capitalized Software Development Costs	Capitalized Software Development Costs
	Costs incurred to develop the Company's cloud-based platform and applications consist of (a) certain external direct costs of materials and services incurred in developing or obtaining internal-use computer software and (b) payroll and payroll-related costs for employees who are directly associated with, and who devote time to, a given project. These costs generally consist of internal labor during configuration, coding and testing activities. Research and development costs incurred during the preliminary project stage or costs incurred for data conversion activities, training, maintenance and general and administrative or overhead costs are expensed as incurred. Capitalization begins when the preliminary project stage is complete, management with the relevant authority authorizes and commits to the funding of the software project, it is probable the project will be completed, and the software will be used to perform the functions intended and certain functional and quality standards have been met. Additionally, the Company also capitalizes costs related to specific upgrades and enhancements when it is probable the expenditures will result in additional functionality. Capitalized software development costs are amortized on a straight-line basis over the estimated useful life, which is generally eighteen months to three years. Amortization expense during the years ended December 31, 2014, 2013 and 2012 was $0.3 million, $0.2 million and $0.1 million respectively.
Business Combinations	Business Combinations
	When the Company acquires businesses, it allocates the purchase price to tangible assets and liabilities, and identifiable intangible assets acquired. Any residual purchase price is recorded as goodwill. The allocation of the purchase price requires management to make significant estimates in determining the fair values of assets acquired and liabilities assumed, especially with respect to intangible assets. These estimates are based on historical experience and information obtained from the management of the acquired companies. These estimates can include, but are not limited to, the cash flows that an asset is expected to generate in the future, the appropriate weighted-average cost of capital, and the cost savings expected to be derived from acquiring an asset. These estimates are inherently uncertain and unpredictable. In addition, unanticipated events and circumstances may occur which may affect the accuracy or validity of such estimates.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets
	The Company records goodwill when the consideration paid in a purchase acquisition exceeds the fair value of the net tangible assets and the identified intangible assets acquired. Goodwill is not amortized, but rather is tested for impairment. The Company performs testing for impairment of goodwill at the end of each year, or as events occur or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. The Company conducts a two-step test for impairment of goodwill. The first step of the test for goodwill impairment compares the fair value of the applicable reporting unit with its carrying value. If the fair value of a reporting unit is less than the reporting unit's carrying value, the Company will perform the second step of the test for impairment of goodwill. During the second step of the test for impairment of goodwill, the Company compares the implied fair value of the reporting unit's goodwill with the carrying value of that goodwill. If the carrying value of the goodwill exceeds the calculated implied fair value, the excess amount will be recognized as an impairment loss. The Company has determined that there is a single reporting unit for the purpose of goodwill impairment tests. Based on the above, the Company determined that its goodwill was not impaired at December 31, 2014.
	Other intangible assets with definite lives, consisting of capitalized software development costs, developed technology, domain names, customer relationships and non-compete agreements, are stated at cost less accumulated amortization and are amortized on a straight-line basis over their estimated remaining economic lives, ranging from one to seven years. Amortization expense related to capitalized software development costs and developed technology is included in cost of revenues. Amortization expense related to customer relationships and non-compete agreements is included in sales and marketing expense. Amortization expense related to domain names is included in general and administrative expense.
Long-Lived Assets	Long-Lived Assets
	The Company continually monitors events and changes in circumstances that could indicate that carrying amounts of its long-lived assets, including property and equipment and identifiable intangible assets, may not be recoverable. When such events or changes in circumstances occur, the Company assesses the recoverability of long-lived assets by determining whether the carrying value of such assets will be recovered through their undiscounted expected future cash flow. If the future undiscounted cash flow is less than the carrying amount of these assets, the Company recognizes an impairment loss based on the excess of the carrying amount over the fair value of the assets. The Company did not recognize impairment charges on its long-lived assets during any of the periods presented.
Concentration of Credit Risk and Significant Customers	Concentration of Credit Risk and Significant Customers
	The Company's financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents and trade accounts receivable. Although the Company deposits its cash with multiple financial institutions, its deposits exceed federally insured limits. The Company generally does not require collateral from its customers and generally requires payment 30 days from the invoice date. The Company's accounts receivable are derived from revenue earned from customers located primarily in North America and Europe. The Company periodically evaluates the collectability of its accounts receivable and provides an allowance for potential credit losses as necessary, based on the age of the receivable and collection experience.
	No single customer accounted for more than 10% of accounts receivable as of December 31, 2014 and 2013. No single customer accounted for 10% or more of total revenue during the years ended December 31, 2014, 2013 and 2012.
Revenue Recognition	Revenue Recognition
	The Company derives its revenue from two sources:
	(1)   Subscription and support revenue. Subscription and support revenue consists of subscription fees from customers accessing the Company's cloud-based solutions platform and applications, as well as related customer support services; and
	(2)   Professional services and other revenue. Professional services and other revenue consists of fees associated with providing expert services that educate and assist the Company's customers on the best use of the Company's solutions as well as assist in the implementation of the Company's solution.
	Revenue recognition commences when all of the following conditions are met:
	•	Persuasive evidence of an arrangement exists;
	•	Delivery or performance has occurred;
	•	Fees are fixed or determinable; and
	•	Collectability is reasonably assured.
	In the majority of instances, revenue from new customers is generated under sales agreements with multiple elements, comprised of subscription and support fees from customers accessing the Company's cloud-based platform and applications and professional consultation services. The Company evaluates each element in a multiple-element arrangement to determine whether it represents a separate unit of accounting. An element constitutes a separate unit of accounting when the delivered item has stand-alone value and delivery of the undelivered element is probable and within the Company's control. Subscription and support have stand-alone value because they are routinely sold separately by the Company. Most of the professional services have stand-alone value because the Company has sold professional services separately, and there are several third party vendors that routinely provide similar professional services to the Company's customers on a stand-alone basis.
	The Company allocates total arrangement fees to each element in a multiple-element arrangement based on the relative selling price hierarchy of each element. The amount of arrangement fee allocated to each element is limited by contingent revenue, if any.
	The relative selling price hierarchy consists of the following: Selling price for a deliverable is based on its 1) VSOE, if available, 2) TPE, if VSOE is not available, or 3) ESP, if neither VSOE nor TPE is available. Because the Company has been unable to establish VSOE or TPE for the elements of its arrangements, the Company establishes the ESP for each element primarily by considering the median of actual sales prices of each type of subscription and support sold and the weighted average of actual sales prices of professional services sold. For subscription and support arrangements, management considered other factors such as database sizes, pricing practices and market considerations.
	Subscription and support revenue is recognized commencing upon delivery of the Company's cloud-based services, which is the date a new subscription is provisioned and made available to a new customer, or new or expanded capabilities are provisioned and added to an existing subscription, provided that all of the other revenue recognition criteria are first met, referred to as the "Commencement Date". Subscription and support revenue is recognized from the Commencement Date ratably thereafter over the remaining contractual term, which is generally three to 36 months. Amounts that have been invoiced are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met.
	Professional services and other have stand-alone value from the related subscription services. The majority of the Company's professional services contracts are offered on a time and material basis. When these services are not combined with subscription and support revenue in a multiple-element arrangement, services revenue is recognized as the services are rendered. Certain standard and non-standard professional service arrangements include customer acceptance provisions. Services provided under arrangements that include customer acceptance provisions are typically provided on a time and material basis, and the revenue is deferred and recognized upon customer acceptance of the service deliverable.
	The Company's professional services also consist of short-term enablement and implementation services, which are offered at a flat fee. The enablement services teams assist customers with standard adoption procedures for the Company's platform. Because such enablement services typically are completed within a short period (usually one to ten days), the Company recognizes revenue from this service upon completion. The implementation services consist of short-term "use it or lose it" services to assist customers with standard implementation and to implement the customer's first marketing campaign which are offered at a flat fee. Such flat fees are recognized ratably over the 120 day period.
	Education revenue is recognized after the services are performed.
	The Company's time and material and fixed price professional service contracts are generally delivered within one year from the date of the arrangement.
	Sales and other taxes collected from customers to be remitted to government authorities are excluded from revenue.
Cost of Revenue	Cost of Revenue
	Cost of subscriptions, support, professional services and other revenue are expensed as incurred. Cost of subscription and support revenue primarily consists of expenses related to hosting the Company's service and providing support to the Company's customers. These expenses are comprised of data center operations costs and personnel and related costs directly associated with the Company's cloud infrastructure, customer support and customer success organizations, including salaries, benefits, bonuses and stock-based compensation, as well as allocated overhead. Overhead associated with facilities and depreciation, excluding depreciation related to the Company's data center infrastructure, is allocated to cost of revenue and operating expenses based on headcount. Cost of professional services and other revenue consists primarily of personnel and related costs directly associated with the Company's professional services and training organizations, including salaries, benefits, bonuses and stock-based compensation, the costs of sub-contracted third-party vendors, as well as allocated overhead.
Deferred Revenue	Deferred Revenue
	Deferred revenue consists of billings or payments received in advance of revenue recognition and are recognized as the revenue recognition criteria are met. The Company generally invoices its customers annually or in quarterly installments payable in advance. Accordingly, the deferred revenue balance does not represent the total contract value of annual or multi-year, noncancelable arrangements. The current portion of deferred revenue represents the amount that is expected to be recognized as revenue within one year from the balance sheet date. In all of the years presented, the Company did not have any long-term deferred revenue.
Commissions	Commissions
	Sales and marketing commissions are recognized as an expense generally at the time the customer order is signed. Substantially all of the effort by the sales and marketing organization is expended through the time of closing the sale with limited or no involvement thereafter. Commissions paid are subject to clawback by the Company in the event the customer fails to make payment on the agreement.
Warranties and Indemnification	Warranties and Indemnification
	The Company's cloud-based solutions platform and applications are typically warranted to perform in a manner consistent with general industry standards that are reasonably applicable and materially in accordance with the Company's on-line help documentation under normal use and circumstances.
	The Company includes service level commitments to its customers warranting certain levels of uptime reliability and performance and permitting those customers to receive credits in the event that the Company fails to meet those levels. To date, the Company has not incurred any material costs as a result of such commitments and has not accrued any liabilities related to such obligations in the accompanying consolidated financial statements.
	The Company's arrangements include provisions indemnifying customers against liabilities if the Company's products infringe a third-party's intellectual property rights. The Company has not incurred any costs as a result of such indemnification and has not accrued any liabilities related to such obligations in the accompanying consolidated financial statements.
	The Company has also agreed to indemnify its directors and executive officers for costs associated with any fees, expenses, judgments, fines and settlement amounts incurred by any of those persons in any action or proceeding to which any of those persons is, or is threatened to be, made a party by reason of the person's service as a director or officer, including any action by the Company, arising out of that person's services as the Company's director or officer or that person's services provided to any other company or enterprise at the Company's request. The Company maintains director and officer insurance coverage that may enable the Company to recover a portion of any future indemnification amounts paid.
Advertising Costs	Advertising Costs
	Advertising costs are expensed as incurred. For the years ended December 31, 2014, 2013 and 2012, advertising expenses were $1.9 million, $1.5 million and $1.2 million, respectively.
Stock-Based Compensation	Stock-Based Compensation
	The Company uses the fair value method for recording stock-based compensation. Stock-based compensation cost for stock options is estimated at the grant date based on each option's fair-value as calculated by the Black-Scholes option-pricing model. The Company recognizes compensation cost for stock option grants on a straight-line basis over the requisite service period for the entire award.
	Stock-based compensation cost for restricted stock units (RSUs) is measured based on the fair value of the underlying shares on the date of grant. All RSUs are subject to a time-based vesting condition and some are also subject to a performance-based vesting condition, both of which must be satisfied before the RSUs are vested and settled for shares of common stock. The time-based vesting condition is generally 4 years. The Company recognizes the compensation cost for RSUs which contain performance conditions based upon the probability of that performance condition being met, over the respective time-based vesting period. RSUs that do not satisfy the time-based vesting condition as of termination of employment are automatically forfeited. All RSUs will expire 7 years from the grant date if not previously settled for shares of common stock.
Income Taxes	Income Taxes
	The provision for income taxes is computed using the asset and liability method, under which deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the financial reporting and tax bases of assets and liabilities, and for operating losses and tax credit carryforwards. Deferred tax assets and liabilities are measured using the currently enacted tax rates that apply to taxable income in effect for the years in which those tax assets are expected to be realized or settled. The Company records a valuation allowance to reduce deferred tax assets to the amount that is believed more likely than not to be realized.
	Compliance with income tax regulations requires the Company to make decisions relating to the transfer pricing of revenue and expenses between each of its legal entities that are located in several countries. The Company's determinations include many decisions based on management's knowledge of the underlying assets of the business, the legal ownership of these assets, and the ultimate transactions conducted with customers and other third parties. The calculation of the Company's tax liabilities involves dealing with uncertainties in the application of complex tax regulations in multiple tax jurisdictions. The Company may be periodically reviewed by domestic and foreign tax authorities regarding the amount of taxes due. These reviews may include questions regarding the timing and amount of deductions and the allocation of income among various tax jurisdictions. In evaluating the exposure associated with various filing positions, the Company records estimated reserves when it is more likely than not that an uncertain tax position will not be sustained upon examination by a taxing authority. Such estimates are subject to change. See Note 11, "Income Taxes".
Net Loss per Share Attributable to Common Stockholders	Net Loss per Share Attributable to Common Stockholders
	Basic and diluted net loss per share of common stock is presented in conformity with the two-class method required for participating securities for 2014, 2013 and 2012. The Company considers the shares issued upon the early exercise of stock options subject to repurchase to be participating securities, because holders of such shares have dividend rights in the event a dividend is paid on common stock. Prior to its conversation to common stock, holders of Series A, B, C, D, E, F and G convertible preferred stock were each entitled to receive noncumulative dividends out of any funds legally available, when, as and if declared by the board of directors, payable prior and in preference to any dividends on any shares of the Company's common stock. The dividend rates for Series A, B, C, D, E, F and G convertible preferred stock were $0.08, $0.12, $0.20, $0.379, $0.5326, $1.056 and $1.168 per share, respectively. In the event a dividend is paid to common stockholders, the holders of the Series A, B, C, D, E, F and G convertible preferred stock were entitled to a proportionate share of any such dividends as if they were holders of common stock (on an as-if converted basis).
	Under the two-class method, net income (loss) attributable to common stockholders is determined by allocating undistributed earnings, calculated as net income less current period convertible preferred stock non-cumulative dividends, between common stock and preferred stock. In computing diluted net income (loss) attributable to common stockholders, undistributed earnings are re-allocated to reflect the potential impact of dilutive securities. Basic net income (loss) per share of common stock is computed by dividing the net income (loss) attributable to common stockholders by the weighted average number of common shares outstanding during the period. Unvested common shares resulting from the early exercises of stock options are excluded from the calculation of the weighted average common shares until they vest as they are subject to repurchase until they are vested. Those shares are added to the calculation of the weighted average common shares outstanding as they vest. Diluted net income per share attributable to common stockholders is computed by dividing net income attributable to common stockholders by the weighted average number of common shares outstanding, including potential dilutive common shares assuming the dilutive effect of potential common shares for the period determined using the treasury stock method. For purposes of this calculation, convertible preferred stock, options to purchase common stock and restricted stock units are considered to be potential dilutive common shares, but have been excluded from the calculation of diluted net loss per share of common stock as their effect is antidilutive for all periods presented. Holders of convertible preferred stock and holders of stock subject to repurchase did not have a contractual obligation to share in the losses of the Company.
	Given the Company is in a loss position for all periods presented, the Company has not allocated losses to early exercise shares subject to repurchase or series of convertible preferred stock.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2013-11, Income Taxes (Topic 740)—Presentation of an unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This amendment clarifies the guidance on the presentation of an unrecognized tax benefit, or a portion of an unrecognized tax benefit, in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The adoption of this update in the first quarter of 2014 did not have a material impact to the consolidated financial position, results of operations, or cash flows.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. ASU 2014-09 also specifies the accounting for some costs to obtain or fulfill a contract with a customer. The new standard is effective for the Company on January 1, 2017. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.

The_Company_and_Summary_of_Sig2

The Company and Summary of Significant Accounting Policies and Estimates (Tables)	12 Months Ended
	Dec. 31, 2014
The Company and Summary of Significant Accounting Policies and Estimates
Schedule of changes in allowance for doubtful accounts
		Balance at		Provision, net		Write-offs			Balance at
		Beginning of		of Recoveries					End of
		Period							Period
		(in thousands)
	Year ended December 31, 2012	$	225	$	362	$	(251	)	$	336
	Year ended December 31, 2013		336		452		(459	)		329
	Year ended December 31, 2014		329		417		(353	)		393

Acquisition_Tables

Acquisition (Tables) (Insightera, Ltd.)	12 Months Ended
	Dec. 31, 2014
Insightera, Ltd.
Acquisition
Schedule of total purchase price allocated to the net assets acquired based upon fair values
		Purchase Price
		Allocation
		(in thousands)
	Tangible assets:
	Cash and cash equivalents	$	3,624
	Accounts receivable		46
	Other current assts		60
	Property and equipment		71
	Other assets		13
	Total tangible assets		3,814
	Liabilities assumed:
	Accounts payable and accrued liabilities		(391	)
	Deferred revenues		(116	)
	Other long-term liabilities		(27	)
	Total liabilities assumed		(534	)
	Deferred tax liability		(374	)
	Intangible assets		4,600
	Goodwill		16,404
	Total purchase price	$	23,910
Schedule of components of identifiable intangible assets acquired in connection with acquisition
		Estimated			Amount
		Useful Life
		(in years)			(in thousands)
	Developed technology		4		$	3,650
	Domain names		3			250
	Customer relationships		3			700
	Total intangible assets				$	4,600

Joint_Venture_Tables

Joint Venture (Tables)	12 Months Ended
	Dec. 31, 2014
Joint Venture
Schedule of the activities of the Company's redeemable non-controlling interests
		Redeemable
		Non-controlling
		Interests
		(in thousands)
	Balance as of December 31, 2013	$	—
	Investment by redeemable non-controlling interests		1,585
	Net loss attributable to redeemable non-controlling interest		(618	)
	Foreign currency translation adjustments		(167	)
	Balance as of December 31, 2014	$	800

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value of Financial Instruments
Schedule of financial assets measured stated at fair value on a recurring basis
		December 31, 2014						December 31, 2013
		Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
		(in thousands)
	Money market funds	$	104,021	$	—	$	—	$	121,466	$	—	$	—
	Certificates of deposit		—		25		—		—		3,219
	Total	$	104,021	$	25	$	—	$	121,466	$	3,219	$	—

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	12 Months Ended
	Dec. 31, 2014
Balance Sheet Components
Schedule of cash and cash equivalents
		December 31,
		2014			2013
		(in thousands)
	Cash	$	8,598		$	3,614
	Cash equivalents
	Money market funds		104,021			121,466
	Certificates of deposit		25			3,219
			104,046			124,685
	Total	$	112,644		$	128,299
Schedule of property and equipment, net
		December 31,
		2014			2013
		(in thousands)
	Computer equipment	$	18,384		$	12,919
	Software		2,417			2,314
	Office furniture		2,071			1,318
	Leasehold improvements		5,123			2,993
	Construction in progress		1,745			51
	Total property and equipment		29,740			19,595
	Less accumulated depreciation		(12,908	)		(5,739	)
	Property and equipment, net	$	16,832		$	13,856
Schedule of accrued expenses and other current liabilities
		December 31,
		2014			2013
		(in thousands)
	Accrued bonuses, commissions and wages	$	10,553		$	12,321
	Accrued ESPP		2,324			3,278
	Accrued vacation		2,972			2,202
	Accrued marketing expenses		1,313			1,062
	Accrued other		3,529			4,192
	Total	$	20,691		$	23,055
Schedule of changes in accumulated other comprehensive income
		Foreign			Total
		Currency
		Translation
		Adjustments
		(in thousands)
	Balance at December 31, 2012	$	145		$	145
	Other comprehensive income before reclassfications		53			53
	Amounts reclassified from accumulated other comprehensive income		—			—
	Balance at December 31, 2013		198			198
	Other comprehensive income before reclassfications		(548	)		(548	)
	Amounts reclassified from accumulated other comprehensive income		—			—
	Balance at December 31, 2014	$	(350	)	$	(350	)

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets
Schedule of goodwill and intangible assets
		December 31, 2014			Weighted		December 31, 2013			Weighted
		(in thousands)			Average		(in thousands)			Average
					Remaining					Remaining
					Useful Life					Useful Life
					(in years)					(in years)
	Developed technology	$	6,050			2.9	$	4,950			3.9
	Domain names		950			3.6		950			4.5
	Customer relationships		1,600			1.6		1,600			4.9
	Non-compete agreements		580			3		130			0.3
	Capitalized software development costs		2,042			1.2		1,355			1.3
			11,222					8,985
	Less accumulated amortization		(4,146	)				(1,890	)
	Intangible assets, net		7,076					7,095
	Goodwill		29,201					25,941
	Goodwill and intangible assets, net	$	36,277				$	33,036
Schedule of amortization expense
		Year Ended December 31,
		2014			2013		2012
		(in thousands)
	Amortization expense	$	2,256		$	717	$	540
Schedule of estimated future amortization based on the carrying amount of intangible assets
		Year Ended December 31,
		2015			2016		2017			2018		2019		Total
		(in thousands)
	Developed Technology	$	1,508		$	1,508	$	1,406		$	—	$	—	$	4,422
	Domain Names		183			180		100			100		29		592
	Customer Relationships		547			315		—			—		—		862
	Non-compete Agreements		150			150		144			—		—		444
	Capitalized Software Development Costs		612			144		—			—		—		756
	Total	$	3,000		$	2,297	$	1,650		$	100	$	29	$	7,076

Credit_Facility_Tables

Credit Facility (Tables)	12 Months Ended
	Dec. 31, 2014
Credit Facility
Schedule of contractual future repayments in relation to the outstanding loan balance
		Principal		Interest		Total
		(in thousands)
	2015	$	2,719	$	168	$	2,887
	2016		2,174		62		2,236
	2017		479		4		483
	Total	$	5,372	$	234	$	5,606

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies.
Schedule of future minimum operating lease payments
		Minimum
		Lease Payment
		(in thousands)
	2015	$	5,244
	2016		5,595
	2017		5,742
	2018		4,115
	2019 and Thereafter		385
	Total	$	21,081

Stockholders_Equity_and_Stock_1

Stockholder's Equity and Stock Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Stockholder's Equity and Stock Based Compensation
Summary of stock option activity
		Number of			Weighted-			Weighted-			Aggregate
		Stock			Average			Average			Intrinsic
		Options			Exercise			Remaining			Value
		Outstanding			Price			Contractual			(in thousands)
		(in thousands)						Life
								(in years)
	Balance as of December 31, 2013		6,343		$	5.33			7.98		$	201,305
	Granted		1,016			38.48
	Exercised		(1,534	)		3.62
	Options Cancelled/Forfeited		(421	)		11.78
	Balance as of December 31, 2014		5,404			11.55			7.56		$	120,594
	Exercisable as of December 31, 2014		4,292		$	5.34			7.2		$	117,520
	Vested and expected to vest as of December 31, 2014		5,038		$	11.04			7.5		$	114,637
Schedule of weighted average grant date fair value of options granted and the total intrinsic value of options exercised
		Year Ended December 31,
		2014			2013			2012
	Weighted average grant date fair value	$	20.72		$	5.08		$	2.69
	Total intrinsic value of options exercised (in thousands)	$	47,273		$	38,241		$	948
Schedule of information regarding options outstanding
		Range of						Shares			Weighted		Weighted		Shares		Weighted
		Exercise Prices						Outstanding			Average		Average		Exercisable		Average
								(in thousands)			Remaining		Exercise		(in thousands)		Exercise
											Contractual		Price				Price
											Term
											(in years)
		$	0.12		$	1.50			579			4.97	$	1.04		579	$	1.04
			2.38			4.24			785			6.56		3.04		761		3.00
			4.56			4.56			1,003			7.33		4.56		949		4.56
			4.74			5.44			351			7.45		4.78		351		4.78
			7.42			7.42			1,396			8.10		7.42		1,396		7.42
			9.24			32.65			484			8.86		21.20		233		12.54
			32.99			32.99			85			8.87		32.99		23		32.99
			40.50			40.50			265			9.07		40.50		—		—
			41.40			41.40			158			9.08		41.40		—		—
			41.91			41.91			298			9.07		41.91		—		—
			0.12			41.91			5,404			7.56		11.55		4,292		5.34
Schedule of assumptions used for estimation of fair value of options granted to employees
		Year Ended December 31,
		2014		2013		2012
	Expected term (in years)	6		6		6
	Risk-free interest rate	1.80% - 1.97%		0.86% - 1.78%		1.02%
	Expected volatility	49% - 56%		57% - 58%		65%
	Expected dividend rate	0%		0%		0%
Summary of Restricted Stock Units RSUs activity
		Number of			Weighted			Aggregate
		RSUs			Average			Intrinsic
		(in thousands)			Grant Date			Value
					Fair Value			(in thousands)
	Balance as of December 31, 2013		582		$	22.57		$	21,579
	RSUs Granted		2,213			34.27
	RSUs Vested		(234	)		15.6
	RSUs Cancelled/Forfeited		(201	)		33.54
	Balance as of December 31, 2014		2,360		$	33.3		$	77,207
Schedule of weighted average grant date fair value of RSU granted and the total fair value
		Year Ended December 31,
		2014			2013			2012
	Weighted average grant date fair value	$	34.27		$	28.69		$	4.58
	Total intrinsic value of vested RSUs (in thousands)	$	7,117		$	2,479		$	—
Schedule of assumptions used to value employee stock purchase rights under the Black-Scholes model
		Year Ended December 31,
		2014		2013		2012
	Expected term (in months)	6 - 9		9		N/A
	Risk-free interest rate	0.05% - 0.11%		0.11%		N/A
	Expected volatility	41% - 43%		42%		N/A
	Expected dividend rate	0%		0%		N/A
Schedule of equity awards available for grant
		Fiscal Year
		2014			2013			2012
		(in thousands)
	Available at beginning of year		3,486			928			1,777
	Additional shares authorized		1,962			4,502			1,875
	Options granted		(1,016	)		(2,225	)		(3,365	)
	Assumed option grants		—			—			(90	)
	Options repurchased		13			13			32
	Withholding taxes for the net share settlement of equity awards		87			5			—
	Options cancelled/forfeited		421			685			1,027
	RSUs granted		(2,213	)		(474	)		(328	)
	RSUs cancelled/forfeited		201			52			—
	Available at end of year		2,941			3,486			928
Schedule of stock-based compensation expense included in operating results
		Year Ended December 31,
		2014			2013			2012
		(in thousands)
	Cost of subscription and support revenue	$	1,626		$	496		$	216
	Cost of professional services and other revenue		2,363			690			169
	Research and development		5,353			2,084			575
	Sales and marketing		8,860			2,293			966
	General and administrative		6,918			2,512			1,046
	Total stock-based compensation expense	$	25,120		$	8,075		$	2,972
Schedule of total unrecognized compensation cost related to unvested awards not yet recognized under all equity compensation plans, adjusted for estimate forfeitures
		December 31, 2014
		Unrecognized			Weighted Average
		Expense			Expected
					Recognition Period
		(in thousands)			(in years)
	Stock options	$	19,434			2.16
	Restricted stock units		52,994			3.11
	Employee stock purchase plan		226			0.13
	Total unrecognized stock-based compensation expense	$	72,654			2.84

Net_Loss_per_Share_Tables

Net Loss per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Net Loss per Share
Schedule of computation of basic and diluted net loss per share of common stock
		Year Ended December 31,
		2014			2013			2012
		(in thousands, except per share data)
	Numerator:
	Net loss attributable to Marketo	$	(54,337	)	$	(47,360	)	$	(34,385	)
	Denominator:
	Weighted-average common shares outstanding		40,602			24,881			2,934
	Less: Weighted-average unvested common shares subject to repurchase or forfeiture and shares held in escrow		(217	)		(172	)		(128	)
	Weighted-average shares used in computing net loss per share of common stock, basic and diluted		40,385			24,709			2,806
	Net loss per share of common stock, basic and diluted	$	(1.35	)	$	(1.92	)	$	(12.26	)
Schedule of potentially dilutive securities excluded from the diluted per share calculation
		Year Ended December 31,
		2014			2013			2012
		(in thousands)
	Convertible preferred stock		—			—			25,876
	Stock options to purchase common stock		5,404			6,343			6,581
	Common stock held in escrow		159			137			12
	Common stock subject to repurchase		50			127			148
	Employee stock purchase plan		125			304			—
	Restricted stock units		2,360			582			328
			8,098			7,493			32,946

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Taxes
Schedule of pretax loss
		Year Ended December 31,
		2014			2013			2012
		(in thousands)
	Loss before provision for income taxes:
	Domestic	$	(46,908	)	$	(37,481	)	$	(29,119	)
	Foreign		(8,524	)		(9,851	)		(5,247	)
	Total	$	(55,432	)	$	(47,332	)	$	(34,366	)
Schedule of provision for income taxes
		Year Ended
		December 31,
		2014			2013			2012
		(in thousands)
	Current tax provision:
	Federal	$	1		$	—		$	—
	State		15			10			3
	Foreign		164			83			16
	Total current tax provision		180			93			19
	Federal		(286	)		—			—
	State		(45	)		—			—
	Foreign		(326	)		(65	)		—
	Total deferred tax benefit		(657	)		(65	)		—
	Total provision (benefit) for income taxes	$	(477	)	$	28		$	19
Schedule of difference between income taxes computed at the federal statutory rate and the provision for income taxes
		Year Ended December 31,
		2014			2013			2012
	Federal statutory rate		34	%		34	%		34	%
	Stock-based compensation		(0.74	)		(1.59	)		(1.54	)
	Valuation allowance		(34.38	)		(28.31	)		(26.85	)
	Foreign rate differential		(2.52	)		(5.00	)		(5.24	)
	Federal research and development credit		2.48			1.19			—
	Other		2.03			(0.35	)		(0.43	)
	Effective income tax rate		0.87	%		(–0.06	)%		(–0.06	)%
Schedule of components of deferred tax assets and liabilities
		Year Ended December 31,
		2014			2013			2012
		(in thousands)
	Deferred tax assets:
	Accounts receivable principally due to allowance for doubtful accounts	$	130		$	92		$	107
	Compensated absences, principally due to accruals for financial reporting purposes		1,867			2,993			1,604
	Net operating loss carryforwards		54,949			42,704			30,251
	Federal tax credits		2,437			1,766			783
	State tax credits net of federal benefit		1,521			1,166			771
	Other deductible temporary differences		1,311			964			521
	Stock-based compensation		7,289			1,508			792
	Foreign Credit		24			25			—
	Total deferred tax assets		69,528			51,218			34,829
	Deferred tax liabilities:
	Capitalized software development		(278	)		(149	)		(37	)
	Acquired intangible assets		(1,983	)		(1,979	)		(964	)
	Total deferred tax liability		(2,261	)		(2,128	)		(1,001	)
	Valuation allowance		(67,159	)		(49,388	)		(33,828	)
	Net deferred taxes	$	108		$	(298	)	$	—
Schedule of net operating loss carryforwards
		Year Ended December 31,
		2014			2013			2012
		(in thousands)
	Federal	$	204,361		$	130,797		$	73,491
	California		146,399			102,606			68,906
	Foreign		24,780			17,673			6,791
	Total	$	375,540		$	251,076		$	149,188
Schedule of research and development credit carryforwards
		Year Ended December 31,
		2014			2013			2012
		(in thousands)
	Federal	$	2,437		$	1,766		$	783
	California		2,305			1,767			1,169
	International		24			25			—
	Total	$	4,766		$	3,558		$	1,952
Schedule of activity related to unrecognized tax benefits
		Year Ended
		December 31,
		2014			2013			2012
		(in thousands)
	Unrecognized benefit—beginning of period	$	472		$	—		$	—
	Gross increases (decreases)—prior period tax positions		34			—			—
	Gross increases (decreases)—current period tax positions		485			472			—
	Unrecognized benefit—end of period	$	991		$	472		$	—

Segment_Information_and_Inform1

Segment Information and Information about Geographic Areas (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Information and Information about Geographic Areas
Schedule of revenue by geographic region
		Year Ended December 31,
		2014		2013		2012
		(in thousands)
	United States	$	125,737	$	82,019	$	50,910
	EMEA		12,772		6,989		3,686
	Other		11,445		6,910		3,817
	Total	$	149,954	$	95,918	$	58,413
Schedule of long-lived assets by geographic areas
		Year Ended
		December 31,
		2014		2013
		(in thousands)
	United States	$	16,265	$	13,573
	EMEA		209		280
	Other		358		3
	Total		16,832		13,856

The_Company_and_Summary_of_Sig3

The Company and Summary of Significant Accounting Policies and Estimates (Details) (USD $)	0 Months Ended	12 Months Ended		0 Months Ended
	17-May-13	Dec. 31, 2014	Dec. 31, 2013	Sep. 13, 2013
Initial Public Offering and Follow-On Offering
Aggregate proceeds from the IPO and concurrent private placement before deduction of offering expenses	$87,000,000
Offering expenses	3,400,000	-62,000	4,079,000
Number of shares of common stock issued upon automatic conversion of convertible preferred stock	25,876,142
Common stock, shares issued		41,481,000	39,250,000
Common stock, shares outstanding		41,481,000	39,250,000
Initial public offering
Initial Public Offering and Follow-On Offering
Shares of common stock sold	6,968,435
Share Price	$13
Underwriters' overallotment option
Initial Public Offering and Follow-On Offering
Shares of common stock sold	908,926
Share Price	$13
Selling Stockholders'
Initial Public Offering and Follow-On Offering
Shares of common stock sold	309,509			5,337,502
Share Price	$13
Private Placement
Initial Public Offering and Follow-On Offering
Shares of common stock sold	500,000
Share Price	$13
Follow-on offering
Initial Public Offering and Follow-On Offering
Shares of common stock sold				6,000,000
Share Price				35.5
Proceeds from common stock sold				22,500,000
Offering expenses				700,000
Common stock sold by the Company
Initial Public Offering and Follow-On Offering
Shares of common stock sold				662,498

The_Company_and_Summary_of_Sig4

The Company and Summary of Significant Accounting Policies and Estimates (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Foreign Currency Translation
Net foreign currency gains	$400,000	($300,000)	($100,000)
Cash and Cash Equivalents
Cash equivalents	104,046,000	124,685,000
Changes in allowance for doubtful accounts
Allowance for Doubtful Accounts Receivable, Beginning Balance	329,000	336,000	225,000
Provision, net of Recoveries	417,000	452,000	362,000
Write-offs	-353,000	-459,000	-251,000
Allowance for Doubtful Accounts Receivable, Ending Balance	$393,000	$329,000	$336,000
Minimum
Property and Equipment
Estimated useful lives of the asset	2 years
Maximum
Property and Equipment
Estimated useful lives of the asset	3 years

The_Company_and_Summary_of_Sig5

The Company and Summary of Significant Accounting Policies and Estimates (Details 3)	12 Months Ended
	Dec. 31, 2014
	item
Concentration of Credit Risk and Significant Customers
Term of credit from the invoice date	30 days
Revenue Recognition
Number of sources of revenue	2
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years
Subscription and support services | Minimum
Revenue Recognition
Term over which revenue is recognized	3 months
Subscription and support services | Maximum
Revenue Recognition
Term over which revenue is recognized	36 months
Enablement services | Minimum
Revenue Recognition
Term of services	1 day
Enablement services | Maximum
Revenue Recognition
Term of services	10 days
Implementation services
Revenue Recognition
Term over which revenue is recognized	120 days

The_Company_and_Summary_of_Sig6

The Company and Summary of Significant Accounting Policies and Estimates (Details 4) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Advertising Costs
Advertising expenses	$1.90	$1.50	$1.20
RSUs
Stock-Based Compensation
Period of time-based vesting		4 years
RSUs | Minimum
Stock-Based Compensation
Period of time-based vesting	2 years
RSUs | Maximum
Stock-Based Compensation
Period of time-based vesting	4 years

The_Company_and_Summary_of_Sig7

The Company and Summary of Significant Accounting Policies and Estimates (Details 5) (Convertible Preferred Stock, USD $)	12 Months Ended
	Dec. 31, 2014
Series A convertible preferred stock
Net Loss per Share Attributable to Common Stockholders
Dividend rates per share (in dollars per share)	$0.08
Series B convertible preferred stock
Net Loss per Share Attributable to Common Stockholders
Dividend rates per share (in dollars per share)	$0.12
Series C convertible preferred stock
Net Loss per Share Attributable to Common Stockholders
Dividend rates per share (in dollars per share)	$0.20
Series D convertible preferred stock
Net Loss per Share Attributable to Common Stockholders
Dividend rates per share (in dollars per share)	$0.38
Series E convertible preferred stock
Net Loss per Share Attributable to Common Stockholders
Dividend rates per share (in dollars per share)	$0.53
Series F convertible preferred stock
Net Loss per Share Attributable to Common Stockholders
Dividend rates per share (in dollars per share)	$1.06
Series G convertible preferred stock
Net Loss per Share Attributable to Common Stockholders
Dividend rates per share (in dollars per share)	$1.17

Acquisition_Details

Acquisition (Details) (USD $)	12 Months Ended			0 Months Ended	1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 19, 2013	Jan. 31, 2014	Dec. 31, 2014
Liabilities assumed:
Goodwill	$29,201,000	$25,941,000				$29,201,000
Total purchase price allocation
Goodwill	29,201,000	25,941,000				29,201,000
Additional disclosures
Granted to employees (in shares)	-2,213,000	-474,000	-328,000
Minimum
Additional disclosures
Estimated useful life of intangible assets	1 year
Maximum
Additional disclosures
Estimated useful life of intangible assets	7 years
Developed technology
Additional disclosures
Estimated useful life of intangible assets	2 years 10 months 24 days	3 years 10 months 24 days
Domain names
Additional disclosures
Estimated useful life of intangible assets	3 years 7 months 6 days	4 years 6 months
Customer relationships
Additional disclosures
Estimated useful life of intangible assets	1 year 7 months 6 days	4 years 10 months 24 days
Non-compete agreements
Additional disclosures
Estimated useful life of intangible assets	3 years	3 months 18 days
Stock options to purchase common stock
Acquisition
Closing stock price (in dollars per share)	$32.72	$37.07				$32.72
RSUs
Acquisition
Closing stock price (in dollars per share)	$32.72					$32.72
Additional disclosures
Granted to employees (in shares)	2,213,000
Insightera, Ltd.
Acquisition
Cash consideration				9,800,000
Number of shares issued				427,761
Closing stock price (in dollars per share)				$32.89
Number of shares withheld in escrow				137,252
Transaction costs		700,000
Additional costs of registration of common stock issued		200,000
Tangible assets:
Cash and cash equivalents				3,624,000
Accounts receivable				46,000
Other current assts				60,000
Property and equipment				71,000
Other assets				13,000
Total tangible assets				3,814,000
Liabilities assumed:
Accounts payable and accrued liabilities				-391,000
Deferred revenues				-116,000
Other long-term liabilities				-27,000
Total liabilities assumed				-534,000
Deferred tax liability				-374,000
Intangible assets				4,600,000
Goodwill				16,404,000
Total purchase price				23,910,000
Total purchase price allocation
Intangible assets				4,600,000
Goodwill				16,404,000
Insightera, Ltd. | Maximum
Liabilities assumed:
Escrow shares withheld, period		18 months
Insightera, Ltd. | Developed technology
Total purchase price allocation
Intangible assets				3,650,000
Additional disclosures
Estimated useful life of intangible assets				4 years
Insightera, Ltd. | Domain names
Total purchase price allocation
Intangible assets				250,000
Additional disclosures
Estimated useful life of intangible assets				3 years
Insightera, Ltd. | Customer relationships
Total purchase price allocation
Intangible assets				700,000
Additional disclosures
Estimated useful life of intangible assets				3 years
Insightera, Ltd. | RSUs | Subsequent Event
Additional disclosures
Granted to employees (in shares)					139,464
Value of shares granted to employees					6,100,000
Immaterial Business Acquisition
Acquisition
Cash consideration						200,000
Number of shares issued						141,074
Closing stock price (in dollars per share)	$33.71					$33.71
Liabilities assumed:
Deferred tax liability	300,000					300,000
Goodwill	3,200,000					3,200,000
Total purchase price	5,000,000					5,000,000
Total purchase price allocation
Net tangible assets acquired	500,000					500,000
Intangible assets	1,600,000					1,600,000
Goodwill	3,200,000					3,200,000
Additional disclosures
Estimated useful life of intangible assets						3 years
Immaterial Business Acquisition | RSUs
Liabilities assumed:
Value of shares issued	$6,400,000					$6,400,000
Immaterial Business Acquisition | Time based RSU member
Acquisition
Number of shares issued						146,762
Immaterial Business Acquisition | Performance based RSU member
Acquisition
Number of shares issued						42,932

Joint_Venture_Details

Joint Venture (Details)	12 Months Ended	0 Months Ended			0 Months Ended			0 Months Ended
	Dec. 31, 2014	Apr. 01, 2015	Apr. 01, 2015	Apr. 01, 2015	Feb. 19, 2014	Feb. 19, 2014	Feb. 19, 2014	Apr. 01, 2015	Apr. 01, 2015	Apr. 01, 2015
	USD ($)	Marketo KK	Marketo KK	Marketo KK	Investors	Investors	Investors	Investors	Investors	Investors
		Forecast	Forecast	Forecast	USD ($)	JPY (¥)		Forecast	Forecast	Forecast
		USD ($)	JPY (¥)					USD ($)	JPY (¥)
Joint Venture
Amount contributed by investors to acquire equity interests	$1,953,000				$2,000,000	¥ 200,000,000
Equity interests held by company (as a percent)	64.60%			39.90%
Contributions to subscribe to additional shares		1,700,000	200,000,000					2,000,000	-237,480,955
Percentage of equity interest held by investors							35.40%			60.10%
Percentage of the common stock callable or puttable beginning on the seventh anniversary	20.00%
Percentage of the common stock callable or puttable beginning on the eighth anniversary	40.00%
Percentage of the common stock callable or puttable beginning on the tenth anniversary	100.00%
Estimated redemption value of call/put option embedded in redeemable non-controlling interests	700,000
Redeemable non-controlling interests
Increase due to investment by redeemable non-controlling interests	1,585,000
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest	-618,000
Redeemable Noncontrolling Interest Foreign Currency Translation Adjustments	-167,000
Balance	$800,000

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Details) (Recurring basis, USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Level 1
Fair Value of Financial Instruments
Total fair value of financial assets	$104,021	$121,466
Level 1 | Money market funds
Fair Value of Financial Instruments
Total fair value of financial assets	104,021	121,466
Level 2
Fair Value of Financial Instruments
Total fair value of financial assets	25	3,219
Level 2 | Certificates of deposit
Fair Value of Financial Instruments
Total fair value of financial assets	$25	$3,219

Balance_Sheet_Components_Detai

Balance Sheet Components (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash and cash equivalents
Cash	$8,598,000	$3,614,000
Cash equivalents:
Money market funds	104,021,000	121,466,000
Certificates of deposit	25,000	3,219,000
Total cash equivalents	104,046,000	124,685,000
Cash and cash equivalents	112,644,000	128,299,000	44,247,000	67,400,000
Property and equipment, net
Total property and equipment	29,740,000	19,595,000
Less accumulated depreciation	-12,908,000	-5,739,000
Property and equipment, net	16,832,000	13,856,000
Depreciation expense	7,200,000	3,900,000	1,200,000
Computer equipment
Property and equipment, net
Total property and equipment	18,384,000	12,919,000
Software
Property and equipment, net
Total property and equipment	2,417,000	2,314,000
Office furniture
Property and equipment, net
Total property and equipment	2,071,000	1,318,000
Leasehold improvements
Property and equipment, net
Total property and equipment	5,123,000	2,993,000
Construction in progress
Property and equipment, net
Total property and equipment	$1,745,000	$51,000

Balance_Sheet_Components_Detai1

Balance Sheet Components (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accrued expenses and other current liabilities
Accrued bonuses, commissions and wages	$10,553	$12,321
Accrued ESPP	2,324	3,278
Accrued vacation	2,972	2,202
Accrued marketing expenses	1,313	1,062
Accrued other	3,529	4,192
Total	20,691	23,055
Changes in accumulated other comprehensive income
Beginning balance	198	145
Other comprehensive income before reclassifications	-548	53
Ending balance	-350	198
Foreign Currency Items
Changes in accumulated other comprehensive income
Beginning balance	198	145
Other comprehensive income before reclassifications	-548	53
Ending balance	($350)	$198

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Intangible Assets
Intangible assets, gross	$11,222,000	$8,985,000
Less accumulated amortization	-4,146,000	-1,890,000
Net Carrying Amount	7,076,000	7,095,000
Goodwill	29,201,000	25,941,000
Goodwill and intangible assets, net	36,277,000	33,036,000
Amortization expense	2,256,000	717,000	540,000
Estimated future amortization
Year Ended December 31, 2015	3,000,000
2016	2,297,000
2017	1,650,000
2018	100,000
2019	29,000
Net Carrying Amount	7,076,000	7,095,000
Developed technology
Goodwill and Intangible Assets
Intangible assets, gross	6,050,000	4,950,000
Net Carrying Amount	4,422,000
Weighted Average Remaining Useful Life	2 years 10 months 24 days	3 years 10 months 24 days
Estimated future amortization
Year Ended December 31, 2015	1,508,000
2016	1,508,000
2017	1,406,000
Net Carrying Amount	4,422,000
Domain names
Goodwill and Intangible Assets
Intangible assets, gross	950,000	950,000
Net Carrying Amount	592,000
Weighted Average Remaining Useful Life	3 years 7 months 6 days	4 years 6 months
Estimated future amortization
Year Ended December 31, 2015	183,000
2016	180,000
2017	100,000
2018	100,000
2019	29,000
Net Carrying Amount	592,000
Customer relationships
Goodwill and Intangible Assets
Intangible assets, gross	1,600,000	1,600,000
Net Carrying Amount	862,000
Weighted Average Remaining Useful Life	1 year 7 months 6 days	4 years 10 months 24 days
Estimated future amortization
Year Ended December 31, 2015	547,000
2016	315,000
Net Carrying Amount	862,000
Non-compete agreements
Goodwill and Intangible Assets
Intangible assets, gross	580,000	130,000
Net Carrying Amount	444,000
Weighted Average Remaining Useful Life	3 years	3 months 18 days
Estimated future amortization
Year Ended December 31, 2015	150,000
2016	150,000
2017	144,000
Net Carrying Amount	444,000
Capitalized software development costs
Goodwill and Intangible Assets
Intangible assets, gross	2,042,000	1,355,000
Net Carrying Amount	756,000
Weighted Average Remaining Useful Life	1 year 2 months 12 days	1 year 3 months 18 days
Software development costs capitalized during period	688,000	478,000
Amortization expense	300,000	200,000	100,000
Estimated future amortization
Year Ended December 31, 2015	612,000
2016	144,000
Net Carrying Amount	$756,000

Credit_Facility_Detail

Credit Facility (Detail) (USD $)	0 Months Ended	12 Months Ended
	21-May-12	Dec. 31, 2014	Dec. 31, 2013	Jun. 06, 2013
			item
Equipment facility
Principal
2015		2,719,000
2016		2,174,000
2017		479,000
Long-term Debt, Total		5,372,000
Interest
2015		168,000
2016		62,000
2017		4,000
Total		234,000
Total
2015		2,887,000
2016		2,236,000
2017		483,000
Total		5,606,000
Original Line of Credit
Credit facility
Maximum borrowing capacity	4,000,000
Minimum interest rate (as a percent)	4.00%
Percentage points above prime rate considered for determining interest rate	0.75%
Interest payment period			9 months
Number of equal monthly principal and interest payments			36
Percentage of increase in interest rate basis of existence of an event as per loan and security agreement		5.00%
New line of credit
Credit facility
Maximum borrowing capacity				$4,500,000

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Leases
Deferred rent	$2,600,000	$1,600,000
Rent expense under operating leases	4,200,000	2,700,000	1,500,000
Capital leases	0
Future minimum operating lease payments
2015	5,244,000
2016	5,595,000
2017	5,742,000
2018	4,115,000
2019 and Thereafter	385,000
Total	21,081,000
Future payments for non-cancellable contractual agreements
2015	2,400,000
2016	800,000
2017	200,000
Future minimum lease payments	$21,081,000

Stockholders_Equity_and_Stock_2

Stockholder's Equity and Stock Based Compensation (Detail)	0 Months Ended
	17-May-13	Dec. 31, 2014	Dec. 31, 2013
Stockholder's Equity and Stock Based Compensation
Convertible preferred stock converted into common stock	25,876,142
Conversion ratio of convertible preferred stock	1
Series A convertible preferred stock | Convertible Preferred Stock
Convertible Preferred Stock
Shares Outstanding		0
Series B convertible preferred stock | Convertible Preferred Stock
Convertible Preferred Stock
Shares Outstanding			0
Series C convertible preferred stock | Convertible Preferred Stock
Convertible Preferred Stock
Shares Outstanding			0
Series D convertible preferred stock | Convertible Preferred Stock
Convertible Preferred Stock
Shares Outstanding			0
Series E convertible preferred stock | Convertible Preferred Stock
Convertible Preferred Stock
Shares Outstanding			0
Series F convertible preferred stock | Convertible Preferred Stock
Convertible Preferred Stock
Shares Outstanding			0
Series G convertible preferred stock | Convertible Preferred Stock
Convertible Preferred Stock
Shares Outstanding		0

Stockholders_Equity_and_Stock_3

Stockholder's Equity and Stock Based Compensation (Detail 2) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Number of Stock Options Outstanding
Cancelled/Forfeited (in shares)	-421,000	-685,000	-1,027,000
Additional information
Number of shares available for issuance	2,941,000	3,486,000	928,000	1,777,000
Total stock-based compensation expense	$25,120,000	$8,075,000	$2,972,000
Maximum
Stockholder's Equity and Stock Based Compensation
Exercise period	10 years
Employee Stock Purchase Plan
Additional information
Total stock-based compensation expense	1,900,000
RSUs
Stockholder's Equity and Stock Based Compensation
Restricted stock units outstanding (in shares)	2,360,000	582,000
Vesting period		4 years
Aggregate Intrinsic Value
Closing stock price (in dollars per share)	$32.72
Additional information
Total stock-based compensation expense	14,000,000
RSUs | Minimum
Stockholder's Equity and Stock Based Compensation
Vesting period	2 years
RSUs | Maximum
Stockholder's Equity and Stock Based Compensation
Vesting period	4 years
RSUs | 2006 Stock Plan
Stockholder's Equity and Stock Based Compensation
Restricted stock units outstanding (in shares)	23,375
Stock options to purchase common stock
Stockholder's Equity and Stock Based Compensation
Stock options to purchase common stock (in shares)	5,404,000	6,343,000
Number of Stock Options Outstanding
Balance at the beginning of the period (in shares)	6,343,000
Granted (in shares)	1,016,000
Exercised (in shares)	-1,534,000
Cancelled/Forfeited (in shares)	-421,000
Balance at the end of the period (in shares)	5,404,000	6,343,000
Exercisable at the end of the period (in shares)	4,292,000
Vested and expected to vest at the end of the period (in shares)	5,038,000
Weighted-Average Exercise Price
Balance at the beginning of the period (in dollars per share)	$5.33
Granted (in dollars per share)	$38.48
Exercised (in dollars per share)	$3.62
Cancelled/Forfeited (in dollars per share)	$11.78
Balance at end of the period (in dollars per share)	$11.55	$5.33
Exercisable at the end of the period (in dollars per share)	$5.34
Vested and expected to vest at the end of the period (in dollars per share)	$11.04
Weighted-Average Remaining Contractual Life
Outstanding at the beginning of the period	7 years 6 months 22 days	7 years 11 months 23 days
Outstanding at the end of the period	7 years 6 months 22 days	7 years 11 months 23 days
Exercisable at the end of the period	7 years 2 months 12 days
Vested and expected to vest at the end of the period	7 years 6 months
Aggregate Intrinsic Value
Outstanding at the beginning of the period	201,305,000
Outstanding at the end of the period	120,594,000	201,305,000
Exercisable at the end of the period	117,520,000
Vested and expected to vest at the end of the period	114,637,000
Closing stock price (in dollars per share)	$32.72	$37.07
Additional information
Weighted average grant date fair value (in dollars per share)	$20.72	$5.08	$2.69
Total intrinsic value of options exercised	47,273,000	38,241,000	948,000
Total estimated grant date fair value of options vested	5,200,000	4,200,000	3,100,000
Total stock-based compensation expense	$9,200,000
Stock options to purchase common stock | 2006 Stock Plan
Stockholder's Equity and Stock Based Compensation
Number of shares available for issuance		0
Stock options to purchase common stock (in shares)	4,340,873
Vesting period	4 years
Number of Stock Options Outstanding
Balance at the end of the period (in shares)	4,340,873
Stock options to purchase common stock | 2013 Equity Incentive Plan
Stockholder's Equity and Stock Based Compensation
Number of shares available for issuance	9,119,341
Stock options to purchase common stock | 2013 Equity Incentive Plan | Minimum
Stockholder's Equity and Stock Based Compensation
Number of shares increased annually under the plan which is available for issuance	3,250,000
Number of shares as a percentage of outstanding shares on last day of preceding fiscal year which are available for issuance	5.00%
Stock options to purchase common stock | Employee Stock Purchase Plan
Additional information
Number of shares available for issuance	709,031
Stock options to purchase common stock | Employee Stock Purchase Plan | Minimum
Stockholder's Equity and Stock Based Compensation
Number of shares increased annually under the plan which is available for issuance	650,000
Additional information
Number of shares as a percentage of outstanding shares on first day of fiscal year which are available for issuance	1.00%
Percentage of fair market value to purchase shares of common stock	85.00%
Stock options to purchase common stock | Employee Stock Purchase Plan | Maximum
Additional information
Maximum percentage of eligible compensation of employees to purchase shares of common stock	15.00%
Maximum number of shares that can be purchased by participant during an offering period	1,250

Stockholders_Equity_and_Stock_4

Stockholder's Equity and Stock Based Compensation (Details 3) (Stock options to purchase common stock, USD $)	12 Months Ended
	Dec. 31, 2014
$ 0.12 - $ 1.50
Information regarding options outstanding
Exercise Price, low end of range (in dollars per share)	$0.12
Exercise Price, high end of range (in dollars per share)	$1.50
Shares Outstanding
Number of shares	579,000
Weighted Average Remaining Contractual Term	4 years 11 months 19 days
Weighted Average Exercise Price (in dollars per share)	$1.04
Shares Exercisable
Number of shares	579,000
Weighted Average Exercise Price (in dollars per share)	$1.04
$ 2.38 - $ 4.24
Information regarding options outstanding
Exercise Price, low end of range (in dollars per share)	$2.38
Exercise Price, high end of range (in dollars per share)	$4.24
Shares Outstanding
Number of shares	785,000
Weighted Average Remaining Contractual Term	6 years 6 months 22 days
Weighted Average Exercise Price (in dollars per share)	$3.04
Shares Exercisable
Number of shares	761,000
Weighted Average Exercise Price (in dollars per share)	$3
$ 4.56 - $ 4.56
Information regarding options outstanding
Exercise Price, low end of range (in dollars per share)	$4.56
Exercise Price, high end of range (in dollars per share)	$4.56
Shares Outstanding
Number of shares	1,003,000
Weighted Average Remaining Contractual Term	7 years 3 months 29 days
Weighted Average Exercise Price (in dollars per share)	$4.56
Shares Exercisable
Number of shares	949,000
Weighted Average Exercise Price (in dollars per share)	$4.56
$ 4.74 - $ 5.44
Information regarding options outstanding
Exercise Price, low end of range (in dollars per share)	$4.74
Exercise Price, high end of range (in dollars per share)	$5.44
Shares Outstanding
Number of shares	351,000
Weighted Average Remaining Contractual Term	7 years 5 months 12 days
Weighted Average Exercise Price (in dollars per share)	$4.78
Shares Exercisable
Number of shares	351,000
Weighted Average Exercise Price (in dollars per share)	$4.78
$ 7.42 - $ 7.42
Information regarding options outstanding
Exercise Price, low end of range (in dollars per share)	$7.42
Exercise Price, high end of range (in dollars per share)	$7.42
Shares Outstanding
Number of shares	1,396,000
Weighted Average Remaining Contractual Term	8 years 1 month 6 days
Weighted Average Exercise Price (in dollars per share)	$7.42
Shares Exercisable
Number of shares	1,396,000
Weighted Average Exercise Price (in dollars per share)	$7.42
$ 6.24 - $ 32.65
Information regarding options outstanding
Exercise Price, low end of range (in dollars per share)	$9.24
Exercise Price, high end of range (in dollars per share)	$32.65
Shares Outstanding
Number of shares	484,000
Weighted Average Remaining Contractual Term	8 years 10 months 10 days
Weighted Average Exercise Price (in dollars per share)	$21.20
Shares Exercisable
Number of shares	233,000
Weighted Average Exercise Price (in dollars per share)	$12.54
$ 32.99 - $ 32.99
Information regarding options outstanding
Exercise Price, low end of range (in dollars per share)	$32.99
Exercise Price, high end of range (in dollars per share)	$32.99
Shares Outstanding
Number of shares	85,000
Weighted Average Remaining Contractual Term	8 years 10 months 13 days
Weighted Average Exercise Price (in dollars per share)	$32.99
Shares Exercisable
Number of shares	23,000
Weighted Average Exercise Price (in dollars per share)	$32.99
$ 40.50 - $ 40.50
Information regarding options outstanding
Exercise Price, low end of range (in dollars per share)	$40.50
Exercise Price, high end of range (in dollars per share)	$40.50
Shares Outstanding
Number of shares	265,000
Weighted Average Remaining Contractual Term	9 years 26 days
Weighted Average Exercise Price (in dollars per share)	$40.50
$ 41.40 - $ 41.40
Information regarding options outstanding
Exercise Price, low end of range (in dollars per share)	$41.40
Exercise Price, high end of range (in dollars per share)	$41.40
Shares Outstanding
Number of shares	158,000
Weighted Average Remaining Contractual Term	9 years 29 days
Weighted Average Exercise Price (in dollars per share)	$41.40
$ 41.91 - $ 41.91
Information regarding options outstanding
Exercise Price, low end of range (in dollars per share)	$41.91
Exercise Price, high end of range (in dollars per share)	$41.91
Shares Outstanding
Number of shares	298,000
Weighted Average Remaining Contractual Term	9 years 26 days
Weighted Average Exercise Price (in dollars per share)	$41.91
$ 0.12 - $ 41.91
Information regarding options outstanding
Exercise Price, low end of range (in dollars per share)	$0.12
Exercise Price, high end of range (in dollars per share)	$41.91
Shares Outstanding
Number of shares	5,404,000
Weighted Average Remaining Contractual Term	7 years 6 months 22 days
Weighted Average Exercise Price (in dollars per share)	$11.55
Shares Exercisable
Number of shares	4,292,000
Weighted Average Exercise Price (in dollars per share)	$5.34

Stockholders_Equity_and_Stock_5

Stockholder's Equity and Stock Based Compensation (Details 4) (USD $)	12 Months Ended			6 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2014
Number of RSUs
RSUs Granted (in shares)	-2,213,000	-474,000	-328,000
RSUs Cancelled/Forfeited (in shares)	201,000	52,000
Shares Available for Grant
Balance at the beginning of the period (in shares)	3,486,000	928,000	1,777,000		928,000		3,486,000
Additional shares authorized	1,962,000	4,502,000	1,875,000
Granted (in shares)	-1,016,000	-2,225,000	-3,365,000
Assumed option grants			-90,000
Repurchased (in shares)	13,000	13,000	32,000
Withholding taxes for the net share settlement of equity awards (in shares)	87,000	5,000	32,000
Options Cancelled/Forfeited (in shares)	421,000	685,000	1,027,000
RSUs Granted (in shares)	-2,213,000	-474,000	-328,000
RSUs Cancelled/Forfeited (in shares)	201,000	52,000
Balance at the end of the period (in shares)	2,941,000	3,486,000	928,000	3,486,000
Assumptions used to estimate fair value of options
Assumptions used for estimation of fair value
Expected term				9 months	9 months
Risk-free interest rate (as a percent)				0.11%	0.11%
Expected volatility (as a percent)				42.00%	42.00%
Expected dividend rate (as a percent)				0.00%	0.00%
Assumptions used to estimate fair value of options | Minimum
Assumptions used for estimation of fair value
Expected term						6 months	6 months
Risk-free interest rate (as a percent)						0.05%	0.05%
Expected volatility (as a percent)						41.00%	41.00%
Expected dividend rate (as a percent)						0.00%	0.00%
Assumptions used to estimate fair value of options | Maximum
Assumptions used for estimation of fair value
Expected term							9 months
Risk-free interest rate (as a percent)						0.08%	0.11%
Expected volatility (as a percent)						43.00%	43.00%
Expected dividend rate (as a percent)						0.00%	0.00%
RSUs
Assumptions used for estimation of fair value
Vesting period		4 years
Number of RSUs
Balance at the beginning of the period (in shares)	582,000						582,000
RSUs Granted (in shares)	2,213,000
RSUs Vested (in shares)	-234,000
RSUs Cancelled/Forfeited (in shares)	-201,000
Balance at the end of the period (in shares)	2,360,000	582,000		582,000
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per share)	22.57						22.57
RSUs Granted (in dollars per share)	34.27	28.69	4.58
RSUs Vested (in dollars per share)	15.6
RSUs Cancelled/Forfeited (in dollars per share)	33.54
Balance at the end of the period (in dollars per share)	33.3	22.57		22.57
Aggregate Intrinsic Value
Balance at the beginning of the period (in dollars)	21,579,000						21,579,000
Balance at the end of the period (in dollars)	77,207,000	21,579,000		21,579,000
Additional information
Closing stock price (in dollars per share)	32.72
Shares Available for Grant
RSUs Granted (in shares)	2,213,000
RSUs Cancelled/Forfeited (in shares)	-201,000
RSUs Granted (in dollars per share)	34.27	28.69	4.58
Total intrinsic value of vested RSUs	7,117,000	2,479,000
Aggregate grant date fair value of vested RSUs	3,700,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	34.27	28.69	4.58
RSUs | Minimum
Assumptions used for estimation of fair value
Vesting period	2 years
RSUs | Maximum
Assumptions used for estimation of fair value
Vesting period	4 years
Stock options to purchase common stock
Assumptions used for estimation of fair value
Expected term	6 years	6 years	6 years
Risk-free interest rate (as a percent)			1.02%
Expected volatility (as a percent)			65.00%
Expected dividend rate (as a percent)	0.00%	0.00%	0.00%
Options granted (in shares)	1,016,000
Additional information
Closing stock price (in dollars per share)	32.72	37.07		37.07
Shares Available for Grant
Options Cancelled/Forfeited (in shares)	421,000
Stock options to purchase common stock | Minimum
Assumptions used for estimation of fair value
Risk-free interest rate (as a percent)	1.80%	0.86%
Expected volatility (as a percent)	49.00%	57.00%
Stock options to purchase common stock | Maximum
Assumptions used for estimation of fair value
Risk-free interest rate (as a percent)	1.97%	1.78%
Expected volatility (as a percent)	56.00%	58.00%
Stock options to purchase common stock | Employee Stock Purchase Plan
Shares Available for Grant
Balance at the end of the period (in shares)	709,031
Vessel | RSUs
Number of RSUs
RSUs Granted (in shares)	42,932
Shares Available for Grant
RSUs Granted (in shares)	42,932
Estimated value of unvested RSU's on date of grant	1,400,000
Vessel | RSUs | Forecast
Shares Available for Grant
RSUs to be granted subject to first product milestone as a percent of total RSUs granted	40.00%
RSUs to be granted subject to second product milestone as a percent of total RSUs granted	60.00%

Stockholders_Equity_and_Stock_6

Stockholder's Equity and Stock Based Compensation (Details 5) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock compensation expense, allocation of recognized costs
Total stock-based compensation expense	$25,120,000	$8,075,000	$2,972,000
Total unrecognized compensation cost related to unvested awards not yet recognized
Unrecognized Expense	72,654,000
Expected Recognition Period	2 years 10 months 2 days
Employee Stock Purchase Plan
Stock compensation expense, allocation of recognized costs
Total stock-based compensation expense	1,900,000
Total unrecognized compensation cost related to unvested awards not yet recognized
Unrecognized Expense	226,000
Expected Recognition Period	1 month 17 days
RSUs
Stock compensation expense, allocation of recognized costs
Total stock-based compensation expense	14,000,000
Vesting period		4 years
Stock compensation expense for RSUs granted upon satisfaction related to first and second product milestones	100,000
Stock compensation expense for RSUs granted upon performance satisfaction related to closing of Initial Public Offering	200,000	1,300,000
Total unrecognized compensation cost related to unvested awards not yet recognized
Unrecognized Expense	52,994,000
Expected Recognition Period	3 years 1 month 10 days
RSUs | Minimum
Stock compensation expense, allocation of recognized costs
Vesting period	2 years
RSUs | Maximum
Stock compensation expense, allocation of recognized costs
Vesting period	4 years
Stock options to purchase common stock
Stock compensation expense, allocation of recognized costs
Total stock-based compensation expense	9,200,000
Total unrecognized compensation cost related to unvested awards not yet recognized
Unrecognized Expense	19,434,000
Expected Recognition Period	2 years 1 month 28 days
Stock options to purchase common stock | 2006 Stock Plan
Stock compensation expense, allocation of recognized costs
Vesting period	4 years
Percentage of awards which will vest after one year	25.00%
Period of beginning of vesting of awards from grant date	1 year
Cost of subscription and support revenue
Stock compensation expense, allocation of recognized costs
Total stock-based compensation expense	1,626,000	496,000	216,000
Cost of professional services and other revenue
Stock compensation expense, allocation of recognized costs
Total stock-based compensation expense	2,363,000	690,000	169,000
Research and development
Stock compensation expense, allocation of recognized costs
Total stock-based compensation expense	5,353,000	2,084,000	575,000
Sales and marketing
Stock compensation expense, allocation of recognized costs
Total stock-based compensation expense	8,860,000	2,293,000	966,000
General and administrative
Stock compensation expense, allocation of recognized costs
Total stock-based compensation expense	$6,918,000	$2,512,000	$1,046,000

Net_Loss_per_Share_Detail

Net Loss per Share (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator:
Net loss attributable to Marketo	($54,337)	($47,360)	($34,385)
Denominator:
Weighted-average common shares outstanding	40,602	24,881	2,934
Less: Weighted-average unvested common shares subject to repurchase or forfeiture and shares held in escrow	-217	-172	-128
Weighted-average shares used in computing net loss per share of common stock, basic and diluted	40,385	24,709	2,806
Net loss per share of common stock, basic and diluted (in dollars per share)	($1.35)	($1.92)	($12.26)
Potentially dilutive securities that were excluded from the diluted per share
Potentially dilutive securities excluded from the diluted per share calculation	8,098	7,493	32,946
Convertible Preferred Stock
Potentially dilutive securities that were excluded from the diluted per share
Potentially dilutive securities excluded from the diluted per share calculation			25,876
Stock options to purchase common stock
Potentially dilutive securities that were excluded from the diluted per share
Potentially dilutive securities excluded from the diluted per share calculation	5,404	6,343	6,581
Common stock held in escrow
Potentially dilutive securities that were excluded from the diluted per share
Potentially dilutive securities excluded from the diluted per share calculation	159	137	12
Common stock subject to repurchase
Potentially dilutive securities that were excluded from the diluted per share
Potentially dilutive securities excluded from the diluted per share calculation	50	127	148
Employee Stock Purchase Plan
Potentially dilutive securities that were excluded from the diluted per share
Potentially dilutive securities excluded from the diluted per share calculation	125	304
RSUs
Potentially dilutive securities that were excluded from the diluted per share
Potentially dilutive securities excluded from the diluted per share calculation	2,360	582	328

Income_Taxes_Detail

Income Taxes (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Loss before provision for income taxes:
Domestic	($46,908,000)	($37,481,000)	($29,119,000)
Foreign	-8,524,000	-9,851,000	-5,247,000
Total	-55,432,000	-47,332,000	-34,366,000
Current tax provision:
Federal	1,000
State	15,000	10,000	3,000
Foreign	164,000	83,000	16,000
Total current tax provision	180,000	93,000	19,000
Deferred Income Tax Expense (Benefit)
Federal	-286,000
State	-45,000
Foreign	-326,000	-65,000
Total deferred tax expense (benefit)	-657,000	-65,000
Total provision (benefit) for income taxes	-477,000	28,000	19,000
Items accounting for the difference between income taxes computed at the federal statutory rate and the provision for income taxes
Federal statutory rate (as a percent)	34.00%	34.00%	34.00%
Stock-based compensation (as a percent)	-0.74%	-1.59%	-1.54%
Valuation allowance (as a percent)	-34.38%	-28.31%	-26.85%
Foreign rate differential (as a percent)	-2.52%	-5.00%	-5.24%
Federal research and development credit (as a percent)	2.48%	1.19%	0.00%
Other (as a percent)	2.03%	-0.35%	-0.43%
Effective income tax rate (as a percent)	0.87%	-0.06%	-0.06%
Deferred tax assets:
Accounts receivable principally due to allowance for doubtful accounts	130,000	92,000	107,000
Compensated absences, principally due to accruals for financial reporting purposes	1,867,000	2,993,000	1,604,000
Net operating loss carryforwards	54,949,000	42,704,000	30,251,000
Federal tax credits	2,437,000	1,766,000	783,000
State tax credits net of federal benefit	1,521,000	1,166,000	771,000
Other deductible temporary differences	1,311,000	964,000	521,000
Stock-based compensation	7,289,000	1,508,000	792,000
Foreign Credit	24,000	25,000
Total deferred tax assets	69,528,000	51,218,000	34,829,000
Deferred tax liabilities:
Capitalized software development	-278,000	-149,000	-37,000
Acquired intangible assets	-1,983,000	-1,979,000	-964,000
Total deferred tax liability	-2,261,000	-2,128,000	-1,001,000
Valuation allowance	-67,159,000	-49,388,000	-33,828,000
Net deferred taxes	108,000	-298,000
Increase in net valuation allowance	$17,800,000	$15,600,000

Income_Taxes_Details_2

Income Taxes (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net operating loss carryforwards
Net operating loss carryforwards	$375,540,000	$251,076,000	$149,188,000
Federal
Net operating loss carryforwards
Net operating loss carryforwards	204,361,000	130,797,000	73,491,000
Excess stock based compensation that will result in increases to additional paid in capital, when realized	72,000,000
California
Net operating loss carryforwards
Net operating loss carryforwards	146,399,000	102,606,000	68,906,000
Excess stock based compensation that will result in increases to additional paid in capital, when realized	37,400,000
Foreign
Net operating loss carryforwards
Net operating loss carryforwards	$24,780,000	$17,673,000	$6,791,000

Income_Taxes_Details_3

Income Taxes (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Credit carryforwards
Credit carryforwards	$4,766,000	$3,558,000	$1,952,000
Reduction of net operating losses as a result of previous ownership changes	1,200,000
Reduction of research and development credits as a result of previous ownership changes	8,000
Uncertain Tax Positions
Unrecognized benefit - beginning of period	472,000
Gross increases (decreases) - prior period tax positions	34,000
Gross increases (decreases) - current period tax positions	485,000	472,000
Unrecognized benefit - end of period	991,000	472,000
Unrecognized tax benefits would affect the Company's effective tax rate, if recognized		0
Interest or penalties accrued related to unrecognized tax benefits		0	0	0
Federal | Research and development
Credit carryforwards
Credit carryforwards	2,437,000	1,766,000	783,000
California | Research and development
Credit carryforwards
Credit carryforwards	2,305,000	1,767,000	1,169,000
Foreign | Research and development
Credit carryforwards
Credit carryforwards	$24,000	$25,000

Employee_401k_Plan_Details

Employee 401(k) Plan (Details) (US Plans Member, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
US Plans Member
401 (k) plan, maximum annual contribution per employee (percent)	90.00%
401(k) plan, employer matching contribution, percent of match	25.00%
401(k) plan, employer matching contribution, percent of employees' gross pay	6.00%
401(k) plan, company's matching contributions	$0.70

Segment_Information_and_Inform2

Segment Information and Information about Geographic Areas (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	item
Segment Information and Information about Geographic Areas
Number of business segment	1
Revenue and long-lived assets by geographic area
Revenue	$149,954	$95,918	$58,413
Long-lived assets	16,832	13,856
United States
Revenue and long-lived assets by geographic area
Revenue	125,737	82,019	50,910
Long-lived assets	16,265	13,573
EMEA
Revenue and long-lived assets by geographic area
Revenue	12,772	6,989	3,686
Long-lived assets	209	280
Other
Revenue and long-lived assets by geographic area
Revenue	11,445	6,910	3,817
Long-lived assets	$358	$3