SENIOR LOAN AND SECURITY AGREEMENT NO. 0161

THIS SENIOR LOAN AND SECURITY AGREEMENT NO. 0161 (this "Security Agreement") is
dated as of May 1, 1998 between ALLAIRE CORPORATION, a Delaware corporation
("Borrower") and PHOENIX LEASING INCORPORATED, a California corporation
("Lender").

                                    RECITALS

     A. Borrower desires to borrow from Lender in one or more borrowings an
amount not to exceed $2,000,000 in the aggregate, and Lender desires to loan,
subject to the terms and conditions herein set forth, such amount to Borrower
(each, a "Loan" and collectively, the "Loans"). Such borrowings shall be
evidenced by one or more Senior Secured Promissory Notes (each, a "Note" and
collectively, the "Notes"), in the form attached hereto.

     B. As security for Borrower's obligations to Lender under this Security
Agreement, the Notes and any other agreement between Borrower and Lender,
Borrower will grant to Lender hereunder a first priority security interest in
certain of its equipment, machinery, fixtures, other items and intangibles,
including but not limited to furniture, fixtures, personal computers, telephone,
communications and other equipment, and also certain software and leasehold
improvements and other items generally considered fungible or expendable ("Soft
Costs") whether now owned by Borrower or hereafter acquired, and all
substitutions and replacements of and additions, improvements, accessions and
accumulations to said equipment, machinery and fixtures and other items,
together with all rents, issues, income, profits and proceeds therefrom
(collectively, the "Collateral") which is described on the Note attached hereto
or any subsequently-executed Note entered into by Lender and Borrower and which
incorporates this Security Agreement by reference.

NOW, THEREFORE, THE PARTIES AGREE AS FOLLOWS:

SECTION 1. TERM OF AGREEMENT. The term of this Security Agreement begins on the
date set forth above and shall continue thereafter and be in effect so long as
and at any time any Note entered into pursuant to this Security Agreement is in
effect. The Term and monthly payment amount payable with respect to each item of
Collateral shall be as set forth in and as stated in the respective Note(s). The
terms of each Note hereto are subject to all conditions and provisions of this
Security Agreement as it may at any time be amended. Each Note shall constitute
a separate and independent Loan and contractual obligation of Borrower and shall
incorporate the terms and conditions of this Security Agreement and any
additional provisions contained in such Note. In the event of a conflict between
the terms and conditions of this Security Agreement and any provisions of such
Note, the provisions of such Note shall prevail with respect to such Note only.

SECTION 2. NON-CANCELABLE LOAN. This Security Agreement and each Note cannot be
canceled or terminated except as expressly provided herein. Borrower agrees that
its obligations to pay all monthly payment amounts and other sums payable
hereunder (and under any Note) and the rights of Lender and any assignee in and
to such rent and other sums, are absolute and unconditional and are not subject
to any abatement, reduction, setoff, defense, counterclaim or recoupment due or
alleged to be due to, or by reason of, any past, present or future claims which
Borrower may have against Lender, any assignee, the manufacturer or seller of
the Collateral, or against any person for any reason whatsoever.

SECTION 3. LENDER COMMITMENT. (a) General Terms. Subject to the terms and
conditions of this Security Agreement and so long as no Event of Default or
event which with the giving of notice or passage of


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time, or both, could become an Event of Default has occurred or is continuing,
Lender hereby agrees to make one or more senior secured Loans to Borrower,
subject to the following conditions: (i) each Loan shall be evidenced by a Note;
(ii) the total principal amount of the Loans shall not exceed $2,000,000 in the
aggregate (the "Commitment") provided that no more than 10% of the amount of the
utilized Commitment may be used to finance Soft Costs; (iii) at the time of each
Loan, no Event of Default or event which with the giving of notice or passage of
time, or both, could become an Event of Default shall have occurred and be
continuing, as reasonably determined by Lender, and certified by Borrower; (iv)
the amount of each Loan shall be at least $25,000 except for a final Loan which
may be less than $25,000; (v) Lender shall not be obligated to make any Loan
after December 31, 1998; (vi) for each Loan, Borrower shall present to Lender a
list of proposed Collateral for approval by Lender in its reasonable discretion
taking into consideration Lender's commitment to finance the types of Collateral
described in Recital B above; (vii) for each Loan, Borrower shall have provided
Lender with each of the closing documents described in Exhibit A hereto (which
documents shall be in form and substance reasonably acceptable to Lender);
(viii) Borrower is performing materially according to its business plan referred
to as "Allaire Corporation, 3 year Business Model-Operating Statement, Balance
Sheet, Statement of Cash Flows" dated March 20, 1998 viable through December
31, 1998 (the "Business Plan"), as may be amended from time to time in form and
substance acceptable to Lender; (ix) there shall be no material adverse change
in Borrower's condition, financial or otherwise, that would materially impair
the ability of Borrower to meet its payment and other obligations under this
Loan (a "Material Adverse Effect") as reasonably determined by Lender, and
Borrower so certifies, from (yy) the date of the most recent financial
statements delivered by Borrower to Lender to (zz) the date of the proposed
Loan; (x) Borrower shall use the proceeds of all Loans hereunder to purchase or
reimburse the purchase of Collateral; (xi) at the time of each Loan, Borrower
has reimbursed Lender for all UCC filing and search costs, inspection and
labeling costs, and appraisal fees, if any; (xii) all Collateral has been marked
and labeled by Lender or Lender's agent; and (xiii) Lender has received in form
and substance acceptable to Lender: (a) Borrower's interim financial statements
signed by a financial officer of Borrower, (b) prior to the first funding,
evidence of Borrower's $4,520,000 cash position as of February 28, 1998 which
Lender acknowledges as received; and (c) complete copies of the Borrower's audit
reports for its most recent fiscal year, which shall include at least Borrower's
balance sheet as of the close of such year, and Borrower's statement of income
and retained earnings and of changes in financial position for such year,
prepared on a consolidated basis and certified by independent public
accountants. Such certificate shall not be qualified or limited because of
restricted or limited examination by such accountant of any material portion of
the company's records. Such reports shall be prepared in accordance with
generally accepted accounting principles and practices consistently applied.

     (b) The Notes. Each Loan shall be evidenced by a Note which may not be
prepaid in whole or in part. Each Note shall bear interest and be payable at the
times and in the manner provided therein. Following payment of the Indebtedness
related to each Note, Lender shall promptly return such Note, marked "canceled,"
to Borrower.

SECTION 4. SECURITY INTERESTS. (a) Borrower hereby grants to Lender a first
security interest in all Collateral; (b) This Security Agreement secures (i) the
payment of the principal of and interest on the Notes and all other sums due
thereunder and under this Security Agreement (the "Indebtedness") and (ii) the
performance by Borrower of all of its other covenants now or hereafter existing
under the Notes, this Security Agreement and any other obligation owed by
Borrower to Lender (the "Obligations").

SECTION 5. BORROWER'S REPRESENTATIONS AND WARRANTIES. Borrower represents and
warrants that (a) it is in good standing under the laws of the state of its
formation, duly qualified to do business and will remain duly qualified during
the term of each Loan in each state where necessary to carry on its present
business and operations, including the jurisdiction(s) where the Collateral will
be located as specified on each


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Exhibit A to each Note, except where failure to be so qualified would not have a
Material Adverse Effect; (b) it has full authority to execute and deliver this
Security Agreement and the Notes and perform the terms hereof and thereof, and
this Security Agreement and the Notes have been duly authorized, executed and
delivered and constitute valid and binding obligations of Borrower enforceable
in accordance with their terms except as the enforceability thereof may be
limited by bankruptcy, insolvency, moratorium, reorganization or other similar
laws affecting the enforcement of creditors' rights generally, and except for
judicial limitations on the enforcement of the remedy of specific enforcement
and other equitable remedies; (c) the execution and delivery of this Security
Agreement and the Notes will not contravene any law, regulation or judgment
affecting Borrower or result in any breach of any material agreement or other
instrument binding on Borrower, which breach would have a Material Adverse
Effect; (d) no consent of Borrower's shareholders or holder of any indebtedness,
or filing with, or approval of, any governmental agency or commission, which has
not already been obtained or performed, as appropriate, is a condition to the
performance of the terms of this Security Agreement or the Notes; (e) there is
no action or proceeding pending or threatened against Borrower before any court
or administrative agency which might have a Material Adverse Effect on the
business, financial condition or operations of Borrower; (f) at the time any
Loan is made hereunder, Borrower owns and will keep all of the Collateral free
and clear of all liens, claims and encumbrances, and, except for this Security
Agreement, there is no deed of trust, mortgage, security agreement or other
third party interest against any of the Collateral other than such interest as
may be contemplated in an intercreditor agreement to which the Lender is a
party; (g) at the time any Loan is made hereunder, Borrower has good and
marketable title to the Collateral; (h) at the time any Loan is made hereunder,
all Collateral has been received, installed and is ready for use and is
satisfactory in all respects for the purposes of this Security Agreement; (i)
the Collateral is, and will remain at all times under applicable law, removable
personal property, which is free and clear of any lien or encumbrance except in
favor of Lender, notwithstanding the manner in which the Collateral may be
attached to any real property other than such lien or encumbrance as may be
contemplated in an intercreditor agreement to which the Lender is a party; (j)
all credit and financial information submitted to Lender herewith or at any
other time is and will at the time given be true and correct in all material
respects; and (k) the security interest granted to Lender hereunder is a first
priority security interest.

SECTION 6. METHOD AND PLACE OF PAYMENT. Borrower shall pay to Lender, at such
address as Lender specifies in writing, all amounts payable to it under this
Security Agreement and the Notes.

SECTION 7. LOCATION; INSPECTION; LABELS. All of the Collateral shall be located
at the address (the "Collateral Location") shown on Exhibit A to each Note and
shall not be moved without Lender's prior written consent which location shall
in all events be within the United States. All of the records regarding the
Collateral shall be located at One Alewife Center, Cambridge, MA 02140, or such
other location of which Borrower has given notice to Lender in accordance with
this Security Agreement. Lender shall have the right to inspect Collateral,
including records relating thereto, and Borrower's books and records at any
time, no more than twice per calendar year, except in the event of a Default
hereunder (upon reasonable notification) during regular business hours, such
books and records to be maintained in accordance with generally accepted
accounting principles. Borrower shall be responsible for all labor, material and
freight charges incurred in connection with any removal or relocation of
Collateral which is requested by Borrower and consented to by Lender, as well as
for any charges due to the installation or moving of the Collateral. Payments
under the Notes and under this Security Agreement shall continue during any
period in which the Collateral is in transit during a relocation. During
Borrower's regular business hours and upon at least two days' notice to
Borrower, Lender or its agent shall mark and label Collateral, which labels (to
be provided by Lender) shall state that such Collateral is subject to a security
interest of Lender, and Borrower shall keep such labels on the Collateral as so
labeled.

SECTION 8. COLLATERAL MAINTENANCE. (a) General. Borrower will reasonably permit
Lender to inspect each item of Collateral and its maintenance records during
Borrower's regular business hours. Borrower


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will at its sole expense comply with all applicable laws, rules, regulations,
requirements and orders with respect to the use, maintenance, repair, condition,
storage and operation of each item of Collateral the noncompliance with which
would have a Material Adverse Effect. Any addition or improvement that is so
required or cannot be so removed will immediately become Collateral of Lender.
(b) With respect to any Collateral, Borrower will at its sole expense maintain
and service and repair any damage to each item of Collateral in a manner
consistent with prudent industry practice and Borrower's own practice so that
such item of Collateral is at all times (i) in the same condition as when
delivered to Borrower, except for ordinary wear and tear, and (ii) in good
operating order for the function intended by its manufacturer's warranties and
recommendations.

SECTION 9. LOSS OR DAMAGE. Borrower assumes the entire risk of loss to the
Collateral through use, operation or otherwise. Borrower hereby indemnifies and
holds harmless Lender from and against all claims, loss of Loan payments, costs,
damages, and expenses relating to or resulting from any loss, damage or
destruction of the Collateral, any such occurrence being hereinafter called a
"Casualty Occurrence." No later than the first payment date following such
Casualty Occurrence, or, if there is no such payment date, no later than thirty
(30) days after such Casualty Occurrence, Borrower shall, at its election,
either: (a) repair the Collateral returning it to good operating condition, or
(b) replace the Collateral with Collateral acceptable to Lender in its
reasonable discretion, in good condition and repair taking all steps required by
Lender to perfect Lender's first priority security interest therein, which
replacement Collateral shall be subject to the terms of this Security Agreement,
or (c) on the first day payment is due on any Note following the Casualty
Occurrence, or if there is no such payment date, thirty (30) days after such
Casualty Occurrence, pay to Lender an amount equal to the Balance Due (as
defined below) for each lost or damaged item of Collateral. The Balance Due for
each such item is the sum of: (i) all amounts for each item which may be then
due or accrued to the payment date, plus (ii) as of such payment date, an amount
equal to the product of the fraction specified below times the sum of all
remaining payments under the respective Note, including the amount of any
mandatory or optional payment required or permitted to be paid by Borrower to
Lender at the maturity of the Note. The numerator of the fraction shall be the
collateral value (as set forth on the applicable Note) of the item and the
denominator shall be the aggregate collateral value of all items under the Note.
Upon the making of such payments, Lender shall release such item of Collateral
from its lien hereunder.

SECTION 10. INSURANCE. Borrower at its expense shall keep the Collateral insured
against all risks of physical loss for at least the replacement value of the
Collateral (including, in the case of Collateral which is vehicles,
comprehensive and collision coverage) and in no event for less than the amount
payable following a Casualty Occurrence (as provided in Section 9). Such
insurance shall provide for a loss payable endorsement to Lender and/or any
assignee of Lender. Borrower shall maintain commercial general liability
insurance, including products liability and completed operations coverage, with
respect to loss or damage for personal injury, death or property damage in an
amount not less than $2,000,000 in the aggregate, (and in the case of Collateral
which is vehicles, in an amount not less than $1,000,000 covering bodily injury
and property damage in a combined single limit) naming Lender and/or Lender's
assignee as additional insured. Such insurance shall contain insurer's agreement
to give thirty (30) days' advance written notice to Lender before cancellation
or material change of any policy of insurance. Borrower will provide Lender and
any assignee of Lender with a certificate of insurance from the insurer
evidencing Lender's or such assignee's interest in the policy of insurance. Such
insurance shall cover any Casualty Occurrence to any unit of Collateral.
Notwithstanding anything in Section 9 or this Section 10 to the contrary, this
Security Agreement and Borrower's obligations hereunder shall remain in full
force and effect with respect to any unit of Collateral which is not subject to
a Casualty Occurrence. If Borrower fails to provide or maintain insurance as
required herein, Lender shall have the right, but shall not be obligated, to
obtain such insurance. In that event, Borrower shall pay to Lender the cost
thereof.

SECTION 11. MISCELLANEOUS AFFIRMATIVE COVENANTS. So long as any portion of the


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Indebtedness is unpaid and as long as any of the Obligations are outstanding
Borrower will: (a) duly pay all governmental taxes and assessments at the time
they become due and payable; provided, however, Borrower may contest the same in
good faith so long as no payment default by Borrower has occurred and is
continuing; (b) comply with all applicable material governmental laws, rules and
regulations relating to its business and the Collateral where a failure to
comply would have a Material Adverse Effect; (c) take no action to adversely
affect Lender's security interest in the Collateral as a first and prior
perfected security interest; (d) furnish Lender with its annual audited
financial statements within one hundred twenty (120) days following the end of
Borrower's fiscal year, unaudited quarterly financial statements within
forty-five (45) days after the end of each fiscal quarter, and within thirty
(30) days of the end of each month a financial statement for that month prepared
by Borrower, and including an income statement and balance sheet, all of which
shall be certified by an officer of Borrower as true and correct and shall be
prepared in accordance with generally accepted accounting principles
consistently applied, and such other information as Lender may reasonably
request; and (e) promptly (but in no event more than five (5) days after the
occurrence of such event) notify Lender of any change in Borrower's condition
during the commitment period which constitutes a Material Adverse Effect, and of
the occurrence of any Event of Default.

SECTION 12. INDEMNITIES. Borrower will protect, indemnify and save harmless
Lender and any assignees from and against all liabilities, obligations, claims,
damages, penalties, causes of action, costs and expenses (including reasonable
attorneys' fees and expenses), imposed upon or incurred by or asserted against
Lender or any assignee of Lender by Borrower or any third party by reason of the
occurrence or existence (or alleged occurrence or existence) of any act or event
relating to or caused by any portion of the Collateral, or its purchase,
acceptance, possession, use, maintenance or transportation, including without
limitation, consequential or special damages of any kind, any failure on the
part of Borrower to perform or comply with any of the terms of this Security
Agreement or any Note, claims for latent or other defects, claims for patent,
trademark or copyright infringement and claims for personal injury, death or
property damage, including those based on Lender's negligence or strict
liability in tort and excluding only those based on Lender's gross negligence or
willful misconduct. In the event that any action, suit or proceeding is brought
against Lender by reason of any such occurrence, Borrower, upon Lender's
request, will, at Borrower's expense, resist and defend such action, suit or
proceeding or cause the same to be resisted and defended by counsel designated
and approved by Lender. Borrower's obligations under this Section 12 shall
survive the payment in full of all the Indebtedness and the performance of all
Obligations with respect to acts or events occurring or alleged to have occurred
prior to the payment in full of all the Indebtedness and the performance of all
Obligations.

SECTION 13. TAXES. Borrower agrees to reimburse Lender (or pay directly if
instructed by Lender) and any assignee of Lender for, and to indemnify and hold
Lender and any assignee harmless from, all fees (including, but not limited to,
license, documentation, recording and registration fees), and all sales, use,
gross receipts, personal property, occupational, value added or other taxes,
levies, imposts, duties, assessments, charges, or withholdings of any nature
whatsoever, together with any penalties, fines, additions to tax, or interest
thereon (the foregoing collectively "Impositions"), except same as may be
attributable to Lender's income, arising at any time prior to or during the term
of any Notes or of this Security Agreement, or upon termination or early
termination of this Security Agreement and levied or imposed upon Lender
directly or otherwise by any Federal, state or local government in the United
States or by any foreign country or foreign or international taxing authority
upon or with respect to (a) the Collateral, (b) the exportation, importation,
registration, purchase, ownership, delivery, leasing, financing, possession,
use, operation, storage, maintenance, repair, return, sale, transfer of title,
or other disposition thereof, (c) the rentals, receipts, or earnings arising
from the Collateral, or any disposition of the rights to such rentals, receipts,
or earnings, (d) any payment pursuant to this Security Agreement or the Notes,
or (e) this Security Agreement, the Notes or any transaction or any part hereof
or thereof


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SECTION 14. RELEASE OF LIENS. Upon payment of all of the Indebtedness and
performance of all of the Obligations, Lender shall execute UCC termination
statements and such other documents as Borrower shall reasonably request to
evidence the release of Lender's lien relating to the Collateral.

SECTION 15. ASSIGNMENT. WITHOUT LENDER'S PRIOR WRITTEN CONSENT WHICH CONSENT
WILL NOT BE UNREASONABLY WITHHELD OR DELAYED, BORROWER SHALL NOT (a) ASSIGN,
TRANSFER, PLEDGE, HYPOTHECATE OR OTHERWISE DISPOSE OF THIS SECURITY AGREEMENT,
ANY NOTE, ANY COLLATERAL, OR ANY INTEREST THEREIN, (b) LEASE OR LEND COLLATERAL
OR PERMIT IT TO BE USED BY ANYONE OTHER THAN BORROWER OR BORROWER'S EMPLOYEES,
CONTRACTORS AND AGENTS OR (c) MERGE INTO, CONSOLIDATE WITH OR CONVEY OR TRANSFER
ITS PROPERTIES SUBSTANTIALLY AS AN ENTIRETY TO ANY OTHER PERSON OR ENTITY EXCEPT
TO A SUCCESSOR IN INTEREST TO ALL OR SUBSTANTIALLY ALL OF THE BUSINESS OF
BORROWER; PROVIDED, HOWEVER, THAT, THE FINANCIAL CONDITION OF SUCH SUCCESSOR IS
GREATER THAN OR EQUAL TO BORROWER AS DETERMINED IN GOOD FAITH BY LENDER AND THE
SUCCESSOR'S BUSINESS AND ITS MAJOR INVESTORS ARE REASONABLY ACCEPTABLE TO
LENDER. LENDER MAY ASSIGN ANY OF THE NOTES, THIS SECURITY AGREEMENT OR ITS
SECURITY INTEREST IN ANY OR ALL COLLATERAL, OR ANY OR ALL OF THE ABOVE, IN WHOLE
OR IN PART TO ONE OR MORE ASSIGNEES OR SECURED PARTIES WITHOUT NOTICE TO
BORROWER. If Borrower is given notice of such assignment it agrees to
acknowledge receipt thereof in writing and Borrower shall execute such
additional documentation as Lender's assignee and/or secured party shall
reasonably require at Lender's expense. Each such assignee and/or secured party
shall have all of the rights, but (except as provided in this Section 15) none
of the obligations, of Lender under this Security Agreement, unless such
assignee or secured party expressly agrees to assume such obligations in
writing. Borrower shall not assert against any assignee and/or secured party any
defense, counterclaim or offset that Borrower may have against Lender.
Notwithstanding any such assignment, and providing no Event of Default has
occurred and is continuing, Lender, or its assignees, secured parties, or their
agents or assigns, shall not interfere with Borrower's right to quietly enjoy
use of Collateral subject to the terms and conditions of this Security
Agreement. Subject to the foregoing, the Notes and this Security Agreement shall
inure to the benefit of, and are binding upon, the successors and assignees of
the parties hereto. Borrower acknowledges that any such assignment by Lender
will not change Borrower's duties or obligations under this Security Agreement
and the Notes or increase any burden or risk on Borrower.

SECTION 16. DEFAULT. (a) Events of Default. Any of the following events or
conditions shall constitute an "Event of Default" hereunder: (i) Borrower's
failure to pay any monies due to Lender hereunder or under any Note beyond the
tenth (lOth) day after the same is due; (ii) Borrower's failure to comply after
being provided with notice and a reasonable period in which to cure if cure is
possible with its material obligations under Section 10 or Section 15; (iii) any
representation or warranty of Borrower made in this Security Agreement or the
Notes or in any other agreement, statement or certificate furnished to Lender in
connection with this Security Agreement or the Notes shall prove to have been
incorrect in any material respect when made or given; (iv) Borrower's failure to
comply with or perform any material term, covenant or condition of this Security
Agreement or any Note or under any other agreement between Borrower and Lender
or under any lease or mortgage of real property covering the location of the
Collateral if such failure to comply or perform is not cured by Borrower within
thirty (30) days after Borrower knows of the noncompliance or nonperformance or
notice from Lender or such longer period that Borrower is diligently attempting
to effect such cure; (v) seizure of any of the Collateral under legal process;
(vi) the filing by or against Borrower or any guarantor under any guaranty
executed in connection with this Security Agreement ("Guarantor") of a petition
for reorganization or liquidation under the Bankruptcy Code or any amendment
thereto or under any other insolvency law providing for the relief of debtors;
(vii) the voluntary or involuntary making of an assignment of a substantial
portion of its assets by Borrower or by any Guarantor for


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the benefit of its creditors, the appointment of a receiver or trustee for
Borrower or any Guarantor or for any of Borrower's or Guarantor's assets, the
institution by or against Borrower or any Guarantor of any formal or informal
proceeding for dissolution, liquidation, settlement of claims against or winding
up of the affairs of Borrower or any Guarantor provided that in the case of all
such involuntary proceedings, same are not dismissed within sixty (60) days
after commencement; (viii) the making by Borrower or by any Guarantor of a
transfer of all or a material portion of Borrower's or Guarantor's assets or
inventory not in the ordinary course of business; or (ix) any default or breach
by any Guarantor of any of the terms of its guaranty to Lender in connection
with this Security Agreement.

     (b) Remedies. If any Event of Default has occurred, Lender may in its sole
discretion exercise one or more of the following remedies with respect to any or
all of the Collateral: (i) declare due any or all of the aggregate sum of all
remaining payments under the Notes, including the amount of any mandatory or
optional payment required or permitted to be paid by Borrower to Lender at the
maturity of the Notes ("Remaining Payments"); (ii) proceed by appropriate court
action or actions either at law or in equity to enforce Borrower's performance
of the applicable covenants of the Notes and this Security Agreement or to
recover all damages and expenses incurred by Lender by reason of an Event of
Default; (iii) except as provided by law, without court order or prior demand,
enter upon the premises where the Collateral is located and take immediate
possession of and remove it without liability of Lender to Borrower or any other
person or entity; (iv) terminate this Security Agreement and sell the Collateral
at public or private sale, or otherwise dispose of, hold, use or lease any or
all of the Collateral in a commercially reasonable manner; or (v) exercise any
other right or remedy available to it under applicable law. If Lender has
declared due any or all of the Remaining Payments, Borrower will pay immediately
to Lender, without duplication, (A) the Remaining Payments, (B) all amounts
which may be then due or accrued, and (C) all other amounts due under this
Security Agreement and under the Notes (Lender's Return, as referred to below,
means the amounts described in clauses (A), (B) and (C) above). The net proceeds
of any sale or lease of such Collateral will be credited against Lender's
Return. The net proceeds of a sale of the Collateral pursuant to this Section
16(b) is defined as the sales price of the Collateral less selling expenses,
including, without limitation, costs of remarketing the Collateral and all
refurbishing costs and commissions paid with respect to such remarketing. The
net proceeds of a lease of the Collateral pursuant to this Section 16(b) is
defined as the amount equal to the monthly payments due under such lease
(discounted at 6% per annum compounded monthly on the basis of a 360 day year
(the "Discount Rate") plus the residual value of the Collateral at the end of
the basic term of such lease, as reasonably determined by Lender, and discounted
at the Discount Rate.

Borrower agrees to pay all reasonable out-of-pocket costs of Lender incurred in
enforcement of this Security Agreement, the Notes or any instrument or agreement
required under this Security Agreement, including, but not limited to reasonable
attorneys' fees and litigation expenses and fees of collection agencies ("Remedy
Expenses"). At Lender's request, Borrower shall assemble the Collateral and make
it available to Lender at such time and location as Lender may reasonably
designate. Borrower waives any right it may have to redeem the Collateral.

Declaration that any or all amounts under this Security Agreement and/or the
Notes are immediately due and payable and Lender's taking possession of any or
all Equipment shall not terminate this Security Agreement or any of the Notes
unless Lender so notifies Borrower in writing. None of the above remedies is
intended to be exclusive but each is cumulative and may be enforced separately
or concurrently.

     (c) Application of Proceeds. The proceeds of any sale of all or any part of
the Collateral and the proceeds of any remedy afforded to Lender by this
Security Agreement shall be paid to and applied as follows:

         First, to the payment of reasonable costs and expenses of suit or
foreclosure, if any, and of the


                                        7






sale, if any, including, without limitation, refurbishing costs, costs of
remarketing and commissions related to remarketing, all Remedy Expenses, all
expenses, liabilities and advances incurred or made pursuant to this Security
Agreement or any Note by Lender in connection with foreclosure, suit, sale or
enforcement of this Security Agreement or the Notes, and taxes, assessments or
liens superior to Lender's security interest granted by this Security Agreement;

         Second, to the payment of all other amounts not described in item
Third below due under this Security Agreement and all Notes;

         Third, to pay Lender an amount equal to Lender's Return, to the extent
not previously paid by Borrower; and

         Fourth, to the payment of any surplus to Borrower or to whomever may
lawfully be entitled to receive it.

     (d) Effect of Delay; Waiver; Foreclosure on Collateral. No delay or
omission of Lender, in exercising any right or power arising from any Event of
Default shall prevent Lender from exercising that right or power if the Event of
Default continues. No waiver of an Event of Default, whether full or partial, by
Lender or such holder shall be taken to extend to any subsequent Event of
Default, or to impair the rights of Lender in respect of any damages suffered as
a result of the Event of Default. The giving, taking or enforcement of any other
or additional security, collateral or guaranty for the payment or discharge of
the Indebtedness and performance of the Obligations shall in no way operate to
prejudice, waive or affect the security interest created by this Security
Agreement or any rights, powers or remedies exercised hereunder or thereunder.
Lender shall not be required first to foreclose on the Collateral prior to
bringing an action against Borrower for sums owed to Lender under this Security
Agreement or under any Note.

SECTION 17. LATE PAYMENTS. Borrower shall pay Lender a late charge of 8% of any
payment owed Lender by Borrower which is not paid when due (taking into account
applicable grace periods), for every month such payment is not paid when due,
but in no event an amount greater than the highest rate permitted by applicable
law. If such amounts have not been received by Lender at Lender's place of
business or by Lender's designated agent by the date such amounts are due under
this Security Agreement or the Notes, Lender shall bill Borrower for such
charges. Borrower acknowledges that invoices for amounts due hereunder or under
the Notes are sent by Lender for Borrower's convenience only. Borrower's
non-receipt of an invoice will not relieve Borrower of its obligation to make
payments hereunder or under the Notes.

SECTION 18. PAYMENTS BY LENDER. If Borrower shall fail to make any payment or
perform any material act required hereunder (including, but not limited to,
maintenance of any insurance required by Section 10), then Lender may, but shall
not be required to, after such notice to Borrower as is reasonable under the
circumstances, make such payment or perform such act with the same effect as if
made or performed by Borrower. Borrower will upon demand reimburse Lender for
all sums paid and all reasonable costs and expenses incurred in connection with
the performance of any such act.

SECTION 19. FINANCING STATEMENTS. Borrower hereby appoints Lender (and each of
Lender's officers, employees or agents designated by Lender) with full power of
substitution by Lender, as Borrower's attorney, with power to execute and
deliver on Borrower's behalf, financing statements and other documents necessary
to perfect and/or give notice of Lender's security interest in any of the
Collateral. Notwithstanding the above, Borrower will, upon Lender's request,
execute all financing statements pursuant to the Uniform Commercial Code and all
such other documents reasonably requested by Lender to perfect Lender's security


                                        8






interests hereunder. Borrower authorizes Lender to file financing statements
signed only by Lender (where such authorization is permitted by law) at all
places where Lender deems necessary.

SECTION 20. NATURE OF TRANSACTION. Lender makes no representation whatsoever,
express or implied, concerning the legal character of the transaction evidenced
hereby, for tax or any other purpose.

SECTION 21. SUSPENSION OF LENDER'S OBLIGATIONS. The obligations of Lender
hereunder will be suspended to the extent that Lender is hindered or prevented
from complying therewith because of labor disturbances, including but not
limited to strikes and lockouts, acts of God, fires, floods, storms, accidents,
industrial unrest, acts of war, insurrection, riot or civil disorder, any order,
decree, law or governmental regulations or interference, failure of the
manufacturer to deliver any item of Collateral or any cause whatsoever not
within the sole and exclusive control of Lender.

SECTION 22. LENDER'S EXPENSE. Borrower shall pay Lender all reasonable costs and
expenses including reasonable attorney's fees and the fees of collection
agencies, incurred by Lender (a) in enforcing any of the terms, conditions or
provisions hereof and related to the exercise of its remedies, and (b) in
connection with any bankruptcy or post-judgment proceeding, whether or not suit
is filed and, in each and every action, suit or proceeding, including any and
all appeals and petitions therefrom.

SECTION 23. ALTERATIONS; ATTACHMENTS. No alterations or attachments shall be
made to the Collateral without Lender's prior written consent, which shall not
be given for changes that will affect the reliability and utility of the
Collateral or which cannot be removed without damage to the Collateral, or which
in any way affect the value of the Collateral for purposes of resale or lease.
All attachments and improvements to the Collateral shall be deemed to be
"Collateral" for purposes of the Security Agreement, and a first priority
security interest therein shall immediately vest in Lessor.

SECTION 24. CHATTEL PAPER. (a) One executed copy of the Security Agreement will
be marked "Original" and all other counterparts will be duplicates. To the
extent, if any, that this Security Agreement constitutes chattel paper (as such
term is defined in the Uniform Commercial Code as in effect in any applicable
jurisdiction) no security interest in the Security Agreement may be created in
any documents other than the "Original." (b) There shall be only one original of
each Note and it shall be marked "Original," and all other counterparts will be
duplicates. To the extent, if any, that any Notes to this Security Agreement
constitutes chattel paper (or as such term is defined in the Uniform Commercial
Code as in effect in any applicable jurisdiction) no security interest in any
Note(s) may be created in any documents other than the "Original."

SECTION 25. COMMITMENT FEE. Borrower has paid to Lender a commitment fee ("Fee")
of $20,000. The Fee shall be applied by Lender first to reimburse Lender for all
out-of-pocket UCC and other search costs, inspections and labeling costs and
appraisal fees, if any, incurred by Lender, and then proportionally to the first
monthly payment for each Note hereunder in the proportion that the Collateral
value for such Note bears to Lender's entire commitment. However, the portion of
the Fee which is not applied to such monthly payments shall be non-refundable
except if Lender defaults in its obligation to fund Loans pursuant to Section 3.

SECTION 26. NOTICES. All notices hereunder shall be in writing, by registered
mail, or reliable messenger or delivery service (including overnight service)
and shall be directed, as the case may be, to Lender at 2401 Kerner Boulevard,
San Rafael, California 94901, Attention: Asset Management and to Borrower at One
Alewife Center, Cambridge, MA 02140, Attention: Steve Cromwell, Controller.


                                        9






SECTION 27. MISCELLANEOUS. (a) Borrower shall provide Lender with such corporate
resolutions, financial statements and other documents as Lender shall reasonably
request from time to time. (b) Borrower represents that the Collateral hereunder
is used solely for business purposes. (c) Time is of the essence with respect to
this Security Agreement. (d) Borrower acknowledges that Borrower has read this
Security Agreement and the Notes, understands them and agrees to be bound by
their terms and further agrees that this Security Agreement and the Notes
constitute the entire agreement between Lender and Borrower with respect to the
subject matter hereof and supersede all previous agreements, promises, or.
representations. (e) This Security Agreement and the Notes may not be changed,
altered or modified except by an instrument signed by an officer or authorized
representative of Lender and Borrower. (f) Any failure of Lender to require
strict performance by Borrower or any waiver by Lender of any provision herein
or in a Note shall not be construed as a consent or waiver of any other breach
of the same or any other provision. (g) If any provision of this Security
Agreement or any Note is held invalid, such invalidity shall not affect any
other provisions hereof or thereof. (h) The obligations of Borrower to pay the
Indebtedness and perform the Obligations shall survive the expiration or earlier
termination of this Security Agreement and each Note until all Obligations of
Borrower to Lender have been met and all liabilities of Borrower to Lender and
any assignee have been paid in full. (i) Borrower will notify Lender at least 30
days before changing its name, principal place of business or chief executive
office. (j) Borrower will, at its expense, promptly execute and deliver to
Lender such documents and assurances (including financing statements) and take
such further action as Lender may reasonably request in order to carry out the
intent of this Security Agreement and Lender's rights and remedies.

SECTION 28. JURISDICTION AND WAIVER OF JURY TRIAL. This Security Agreement and
the Notes shall be deemed to have been negotiated, entered into and performed in
the State of California and it is understood and agreed that the validity of
this Security Agreement and of any of the terms and provisions, of the Security
Agreement and Notes, as well as the rights and duties of Lender and Borrower,
shall be construed pursuant to and in accordance with the laws of the State of
California, without giving effect to conflicts of law principles. It is agreed
that exclusive jurisdiction and venue for any legal action between the parties
arising out of or relating to this Security Agreement and each Note shall be in
the Superior Court for Marin County, California, or, in cases where federal
diversity jurisdiction is available, in the United States District Court for the
Northern District of California situated in San Francisco. BORROWER, TO THE
EXTENT IT MAY LAWFULLY DO SO, HEREBY WAIVES ITS RIGHT TO TRIAL BY JURY IN ANY
ACTION BROUGHT ON OR WITH RESPECT TO THIS SECURITY AGREEMENT, ANY NOTE, ANY
SECURITY DOCUMENTS, OR ANY OTHER AGREEMENTS EXECUTED IN CONNECTION HEREWITH.

SECTION 29. ADDITIONAL INTEREST COMPENSATION: (a) General. Borrower shall be
required to choose a final payment or Note extension election ("Additional
Interest Compensation") at the expiration of the first Note's term. Borrower
shall provide written notice of its election to Lender at least 90 days prior to
the end of the term of the first Note. That choice shall be an election of
Borrower's additional interest compensation election for all, but not less than
all, of the Collateral under all Notes under the Security Agreement.

In the event Borrower does not provide 90 days' prior written notice of its
election, Borrower shall be deemed to have elected Election No. 2.

(b) End of Loan Position Elections. As Additional Interest Compensation,
Borrower shall be required to:

Election No. 1: Make a final payment equal to 15% of the Note's original
principal amount.

Election No. 2: Extend the Note's term for an additional 6 months ("Extended
Term") for a monthly rate of 3.155% of the Note's original principal amount. At
the expiration of the Extended Term, provided no Event of


                                       10






Default has occurred and is continuing, no further payments shall be due under
the Note and all Lender's right, title and interest in the Collateral will
transfer to Borrower.

IN WITNESS WHEREOF, Borrower and Lender have caused this Security Agreement to
be executed as of the date and year first above written.

PHOENIX LEASING INCORPORATED            ALLAIRE CORPORATION     
                                                                
By:    /s/ Gregory D. Kilian            By:   /s/ David A. Gerth 
       ------------------------               -------------------------
Name:  Gregory D. Kilian                Name (Print): David A. Gerth
       ------------------------                       -----------------
Title: Assistant Vice President         Title: Chief Financial Officer 
       ------------------------                ------------------------


                                        HEADQUARTERS LOCATION:
                                        -------------------------------
                                        One Alewife Center
                                        Cambridge, MA 02140
                                        County of Middlesex

                                        EXHIBITS AND SCHEDULES:
                                        -------------------------------
                                        Exhibit A -- Closing Memorandum



                                       11





                                     EXHIBIT A TO
                                     SENIOR LOAN AND SECURITY AGREEMENT NO. 0161
                                     DATED May 1, 1998


                               CLOSING MEMORANDUM
                               ------------------

1*   Duly executed Senior Loan and Security Agreement.

2.   Duly executed Senior Security Promissory Note with A Collateral description
     attached.

3.   Insurance certificates reflecting coverage required under Section 10 of the
     Senior Loan and Security Agreement.

4.*  Resolutions of Borrower's board of directors.

5.   Real Property Waiver.**

6.   UCC-1 Financing Statements with respect to the Collateral.

7.   UCC search (Lender will obtain).

8.   Certificate of Chief Financial Officer stating that (i) there are no liens,
     charges, security interests or other encumbrances that may affect Lender's
     right, title and interest in the Collateral and there are no WCC-1
     financing statements filed or in the process of being filed against any of
     the Collateral, (ii) Borrower is performing according to Borrower's
     business plan, (iii) no change which is a Material Adverse Effect has
     occurred in the financial condition of Borrower, (iv) no default has
     occurred, and (v) the representations and warranties in Section 5 of the
     Senior Loan and Security Agreement are true and correct as if made on the
     date of the Loan.

9.*  Certificate from the Secretary of State of Borrower's state of
     incorporation, and from the state in which Borrower's chief executive
     office is located, if different, stating the Borrower is in good standing
     or is authorized to transact business, as the case may be, dated not more
     than thirty days prior to the first Loan (Lender will obtain).

10.* Borrower's Business Plan.

11.  Borrower's most recent financial statements.

12.  List of proposed Collateral.

13.  Purchase documentation verifying Borrower's ownership of equipment.

14.  See Section 3 of the Senior Loan and Security Agreement for additional
     conditions to closing.

15.  Intercreditor Agreement, if applicable.


*    First Loan only.

**   Required if any Equipment is a fixture, i.e., attached to real property, or
     located in certain states.