PROS 8K Reports Third Quarter 2023 Financial Results | PRO 31 Oct 23

© PROS, Inc. All rights reserved. Confidential and Proprietary Disclaimer / Forward-Looking Statements This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including statements about our financial outlook; expectations; ability to achieve future growth and profitability goals; management's confidence and optimism; positioning; customer successes; demand for our software solutions; pipeline; business expansion; revenue; subscription revenue; subscription ARR; non-GAAP earnings (loss) per share; adjusted EBITDA; free cash flow; shares outstanding and effective tax rate. The forward-looking statements contained in this presentation are based upon our historical performance and our current plans, estimates and expectations and are not a representation that such plans, estimates or expectations will be achieved. Factors that could cause actual results to differ materially from those described herein include, among others, risks related to: (a) the macroeconomic environment, (b) the effects of inflation, (c) the impact of the COVID-19 pandemic, (d) cyberattacks, data breaches and breaches of security measures within our products, systems and infrastructure or products, systems and infrastructure of third parties upon whom we rely, (e) increasing business from customers and maintaining subscription renewal rates, (f) managing our growth and profit objectives effectively, (g) disruptions from our third party data center, software, data, and other unrelated service providers, (h) implementing our solutions, (i) cloud operations, (j) intellectual property and third-party software, (k) acquiring and integrating businesses and/or technologies, (l) catastrophic events, (m) operating globally, including economic and commercial disruptions, (n) potential downturns in sales and lengthy sales cycles, (o) software innovation, (p) competition, (q) market acceptance of our software innovations, (r) maintaining our corporate culture, (s) personnel risks including loss of any key employees and competition for talent, (t) expanding and training our direct and indirect sales force, (u) evolving data privacy, cyber security and data localization laws, (v) our debt repayment obligations, (w) the timing of revenue recognition and cash flow from operations, (x) migrating customers to our latest cloud solutions, and (y) returning to profitability. Additional information relating to the risks and uncertainties affecting our business is contained in our filings with the SEC. These forward-looking statements represent our expectations as of the date hereof. Subsequent events may cause these expectations to change, and PROS disclaims any obligations to update or alter these forward-looking statements in the future, whether as a result of new information, future events or otherwise. This presentation includes certain supplemental non-GAAP financial measures, that we believe are useful to investors as tools for assessing the comparability between periods as well as company by company. Our computation of these measures may not be comparable to other similarly titled measures computed by other companies. These non-GAAP financial measures should be considered in addition to, but not as a substitute for, our financial information and results prepared in accordance with U.S. GAAP included in our periodic filings made with the SEC. Investors are encouraged to review the reconciliation of our historical non-GAAP financial measures to the comparable GAAP results, which can be found, along with other financial information, on the investor relations’ page of our website at PROS.com. We are unable to reconcile forward-looking non-GAAP financial measures to their directly comparable GAAP financial measures because the information needed to complete a reconciliation is unavailable at this time without unreasonable effort. 2

© PROS, Inc. All rights reserved. Confidential and Proprietary PROS at a Glance 3 $297mm+ Total Revenue TTM Q3 2023 84% Recurring Revenue as a % of Q3 2023 Total Revenue $38B+ Underpenetrated, Addressable Market Subscription Revenue Growth YoY Q3 2023 70+ Countries with Customers 16% 93%+ Customer Gross Revenue Retention Rate TTM Q3 2023 3.1T Transactions Processed TTM Q3 2023 with 99.98% Platform Uptime 78% Non-GAAP Subscription Gross Margin Q3 2023; 335+ bps Improvement in 8 Quarters

© PROS, Inc. All rights reserved. Confidential and Proprietary Businesses Face Many Challenges Today Business uncertainty is here to stay. Everything is in a constant state of rapid change – costs, currencies, supply chains, prices, demand patterns – and in response, businesses must constantly change what they sell, how they sell, and how they price. Customers have increasingly higher expectations. Buyers expect every buying experience to be as magical as the best one they have ever had (“the Amazon effect”). Self-serve, personalization, transparency, and accuracy driven by convenience, value, and confidence across all touchpoints. The way we work is evolving. Manual business processes and disconnected digital tools cause more time to be spent on process than on driving business forward. Digitization, automation, and AI are critical for keeping up and driving a better employee experience. 6

© PROS, Inc. All rights reserved. Confidential and Proprietary PROS Real-Time AI Platform Maximizes Value for B2B Commerce 7 Back Office Systems ERP + Many More Partner Sales / Distributors Direct Sales Marketers eCommerce / Marketplaces Partner Portals Marketing Systems + Many More API CRM Front Office Systems AI Real-Time Secure Scalable High Availability Extensible Superior UX Insights Powered by an Industry-Leading Real-Time, AI Platform Real-Time Omnichannel Digital Marketing Smart Configure, Price, QuoteSmart Price Optimization & Management Partner Ecosystem Omnichannel Price Management Automatic UoM & Currency Conversion List Price / Negotiated Price Tiered Prices / Discounts AI-driven Price Optimization 700ms Real-Time Price Delivery Margin Driver Analysis Price Waterfalls & Advanced Analytics Omnichannel Quoting Guided Selling Rich Media Catalog 10K+ Line Quotes Constraints-based Configuration Price Agreements Document Generation Collaboration Portal Rebates Billing CLM Product/Supply Mix Optimization Subscription Rate Plans Mass Price Update Workflow Subscription Quoting Sales Incentive Comp Data Warehouse Homegrown Systems API Data Providers Buyer

© PROS, Inc. All rights reserved. Confidential and Proprietary PROS Real-Time AI Platform Maximizes Value for Travel Commerce 8 Back Office Systems PSS + Many More Partner Sales / Distributors Direct Sales Marketers Airline.com MSE Agency Portals / GDS + Many More API OTA Front Office Systems AI Real-Time Secure Scalable High Availability Extensible Superior UX Insights Powered by an Industry-Leading Real-Time, AI Platform Real-Time Omnichannel Digital Marketing Partner Ecosystem Promotional Rebooking Payments +Advertising ERP Homegrown Systems API Data Warehouse & Data Providers Buyer Marketing Systems Revenue Management Shopping/Distribution Groups Demand Forecasting Class-based or Continuous Pricing Holiday, Special Events, & Influences Network / O&D / Segment Optimization Willingness-To-Pay Model Dynamic Pricing of Ancillaries Quote, Negotiate, Save, and Book Management & PNR Modifications Ticketing & Payments Reporting & Analytics Ancillaries EMD Handling Full NDC Offer Management Direct Distribution to MSE Direct Connect Pricing and Availability ATPCO Pricing & Repricing Inspiration / Calendar Search Merchandising

© PROS, Inc. All rights reserved. Confidential and Proprietary Real-Time AI is at the Core of the PROS Platform 9 Real- Time Secure ScalableHigh Availability Superior UX Extensible AI Self-Learning, Trainable Predictive, Prescriptive, Generative Explainable, Trustworthy, Ethical 89 Data Scientists and ~460 Engineers 20+ Patents 99.98% Uptime1 3.1 Trillion Transactions Processed1 Sub-700ms Response Time ~5.9mm Transactions Per Minute1 Extensible 1) Trailing twelve-month measurement as of Q3 2023. Transactions per minute is an average over the period.

© PROS, Inc. All rights reserved. Confidential and Proprietary PROS Library of AI Models & Techniques Ensemble to Solve High-Value Business Problems 10 PROS AI Business AI Internet AI Perceptual AI L e a rn in g P a ra d ig m s , M o d e ls & T o o ls Prescriptive Algorithms • Linear programming • Non-linear programming • Dynamic programming • Integer programming • Reinforcement learning Data Science Techniques • Constraint satisfaction programming • Shapley value (SHAP) • kNN clustering • Extensible AI Recommender System Collaborative Filtering Human-Computer Interaction ChatGPT (Azure OpenAI) Predictive Algorithms • Neural networks (FF Wide & Deep, NN Matrix Factorization) • Online Learning (Bayesian & Variational Inference) • Decision Trees • Semi-parametric Estimation • Parametric estimation B u s in e s s P ro b le m s Revenue / Margin • Negotiated Price Optimization • Ecommerce Price Optimization • EMSR (Expected Marginal Seat Revenue) • O&D, Leg & Segment-based Optimization Cost • Inventory Control + Optimization • Capacity Aware Optimization • Forecasting • Cost Optimization Profit Optimization • Offer Optimization • Dynamic Pricing of Ancillaries • Cross-Sell / Upsell Recommendation • Churn Prediction Sales Guidance • Production Planning • Fleet Acquisition & Disposition • Fleet Distribution • Production Mix Optimization • Procurement Optimization Supply Chain Optimization

© PROS, Inc. All rights reserved. Confidential and Proprietary Highly Extensible Across Industries & Use Cases 11 Travel Chemicals & Energy Healthcare Food & Consumables Services Automotive & Industrial Technology

© PROS, Inc. All rights reserved. Confidential and Proprietary The Power of AI Drives Measurable Business Outcomes 12 400% ROI in 3 years Payback in 9 months & Source: Forrester Total Economic Impact Report, 2023 +8% Revenue Uplift +200 bps Margin Improvement +67% Efficiency Gain Source: PROS study of 131 customers’ self-reported results, 2022 Our customers have said… Industry experts have said…

© PROS, Inc. All rights reserved. Confidential and Proprietary PROS Customers Consistently Outperform US Market Indices 13 -30.00% -25.00% -20.00% -15.00% -10.00% -5.00% 0.00% 5.00% 10.00% 15.00% Index Performance January 2022 through September 2023 Russell 2000 Index (^RUT) - Index Value S&P 500 (^SPX) - Index Value Dow Jones Industrial Average (^DJI) - Index Value PROS Customers - Index Value Source: S&P Capital IQ. Data is as of market close on September 29, 2023. PROS Customer Index is a custom index assembled by PROS, comprised of publicly traded companies who were active SaaS customers of PROS before January 1, 2023. These customers span automotive/industrial, chemical, energy, food, healthcare services, technology, and travel industries. The aggregated stock price performance of PROS customers is illustrative only, and PROS makes no representations nor guarantees regarding future financial or stock price performance for any customer. PROS has no obligation to update this information. PROS Customers +7.2% Dow Jones -8.4% S&P 500 -10.6% Russell 2000 -21.5%

© PROS, Inc. All rights reserved. Confidential and Proprietary PROS TAM is Massive, Global, and Growing 14 $38B+ Underpenetrated, Addressable Market(1) $14B+ Strategic Industries & Geographies $3.3B Travel $3.2B Automotive & Industrial $2.1B Healthcare $1.9B Technology $1.8B Food & Consumables $1.1B Business Services $800mm Chemicals & Energy (1) TAM represents our estimated global total revenue and market opportunity but does not represent the actual market opportunity that we may target or ultimately service or otherwise derive revenue from. Our estimate of TAM may be revised in the future depending on a variety of factors, including competitive dynamics, our sales efforts, customer needs, industry shifts and other economic factors.

© PROS, Inc. All rights reserved. Confidential and Proprietary Strategic Focus Areas 15 Land the Platform, Realize Value, and Expand with Many Paths Leverage Partnerships to Accelerate deal Velocity Decrease Time to Value and Improve Customer Advocacy

© PROS, Inc. All rights reserved. Confidential and Proprietary $136k $928k Q1'18 Q1'23 Proven Land & Expand Motion in Our Business 16 $38k $282k Q2'21 Q1'23 7.5x $639k $3.1M Q1'18 Q1'23 Passenger Airline 3 4.8x $262k $1.6M Q1'18 Q1'23 6.3x $1.3M $5.1M Q1'18 Q1'23 Passenger Airline 4 4x $425k $3.3M Q1'18 Q1'23 7.7x Industrial Equipment Distributor 6.8x $527k $4.1M Q1'18 Q1'23 7.7x $229k $1.4M Q1'18 Q1'23 Leading B2B Distributor 6.2x TravelB2B Passenger Airline 1 Passenger Airline 2Multinational Oil & Gas Company Industrial Manufacturing Conglomerate

© PROS, Inc. All rights reserved. Confidential and Proprietary Extensive Integrations & Technology Partners 18 API integration into any ecosystem CRMs ERP / Platform eCommerce Platforms SalesTech Online Travel Agencies Reservations & Bookings Data Providers Billing, Payments & Tax Payment Gateway Commerce Cloud MarTech

© PROS, Inc. All rights reserved. Confidential and Proprietary PROS Has Delivered Long-Term Sustainable Growth 20 $29 $38 $61 $99 $145 $170 $178 $204 $71 $97 $118 $145 $186 $168 $153 $169 $197 $250 $252 $251 $276 CY10A CY11A CY12A CY13A CY14A CY15A CY16A CY17A CY18A CY19A CY20A CY21A CY22A Total Revenue ($MM) Subscription Transition CY15 – CY19 GTM Transformation CY22 - Ongoing 49% CY15 – CY19 Subscription CAGR COVID CY20 – CY21 27% CY10 – CY14 Revenue CAGR Subscription Revenue

© PROS, Inc. All rights reserved. Confidential and Proprietary Subscription Revenue Growth Trajectory ($mm, %YoY Growth) 21 60.5 98.7 145.3 170.5 178.0 204.0 233.6 2017 2018 2019 2020 2021 2022 2023E 49% 17% 47% 4% 15% 14% • 27% 5-Year CAGR (2017 through 2022) • Continued growth through the COVID-19 pandemic 1) 2023 dollar value and growth rate based on the mid-point of the Subscription Revenue 2023 Guidance. 2023 expectations are forward-looking statements. Given the risks, uncertainties and assumptions related to PROS’ business and operations, PROS’ actual future results may differ materially from these expectations. Investors should review the Company’s cautionary statements and risk factors referred to in this presentation. 1

© PROS, Inc. All rights reserved. Confidential and Proprietary Driving Consistent Margin1 Expansion 22 1) For definitions of non-GAAP measures or reconciliation of non-GAAP to GAAP measures, please refer to the appendix of this presentation. 63% 63% 64% 64% 65% 64% 65% 66% Q4 '21 Q1 '22 Q2 '22 Q3 '22 Q4 '22 Q1 '23 Q2 '23 Q3 '23 Non-GAAP Gross Margin 75% 76% 76% 77% 77% 78% 78% 78% Q4 '21 Q1 '22 Q2 '22 Q3 '22 Q4 '22 Q1 '23 Q2 '23 Q3 '23 Non-GAAP Subscription Gross Margin 335+ basis point improvement in 8 quarters 330+ basis point improvement in 8 quarters

© PROS, Inc. All rights reserved. Confidential and Proprietary Third Quarter 2023 Earnings Recap 23 $mm (Except Per Share) Q3 2023 Q3 2022 Delta TTM 9/30/2023 TTM 9/30/2022 Delta Total Revenue $77.3 $70.3 10% $297.2 $270.2 10% Subscription Revenue $60.0 $51.8 16% $226.4 $197.9 14% Adjusted EBITDA1 $5.6 $(2.2) $7.8 $5.9 $(23.6) $29.5 Free Cash Flow1 $8.5 $(9.1) $17.6 $(1.2) $(24.1) $22.9 Non-GAAP (Loss) Earnings Per Share2 $0.09 $(0.06) $0.15 $0.04 $(0.57) $0.61 1) For definitions of non-GAAP measures or reconciliation of non-GAAP to GAAP measures, please refer to the appendix of this presentation. 2) For definition of non-GAAP EPS or reconciliation of non-GAAP EPS to GAAP EPS, please refer to our earnings press release.

© PROS, Inc. All rights reserved. Confidential and Proprietary Guidance Summary 24 $mm (Except Per Share) Q4 2023 Guidance v. Q4 2022 at Mid- Point Full Year 2023 Guidance (10/31/2023) v. Prior Year at Mid-Point Prior Full Year 2023 Range (7/25/2023) Total Revenue $76.0 to $77.0 8% $302.2 to $303.2 10% $300.0 to $302.0 Subscription Revenue $60.0 to $60.5 13% $233.3 to $233.8 14% $231.7 to $233.7 Subscription ARR n/a n/a $251.0 to $254.0 11% $251.0 to $254.0 Non-GAAP Earnings Per Share $0.03 to $0.05 $0.02 n/a n/a n/a Adjusted EBITDA $3.0 to $4.0 $1.1 $6.5 to $7.5 $21.9 $5.5 to $7.5 Free Cash Flow n/a n/a $3.5 to $6.5 $26.7 $2.5 to $6.5 The 2023 Guidance shown here are forward-looking statements. Given the risks, uncertainties and assumptions related to PROS’ business and operations, PROS’ actual future results may differ materially from these expectations. Investors should review the Company’s cautionary statements and risk factors referred to in this presentation. Based on an estimated 47.5 million diluted weighted average shares outstanding for the fourth quarter of 2023 and a 22% non-GAAP estimated tax rate for the fourth quarter and full year 2023. Please see appendix for a reconciliation of non-GAAP metrics to GAAP metrics.

© PROS, Inc. All rights reserved. Confidential and Proprietary Targeting “Rule of 40” by 2026 25 16-21% 19-24% Total Revenue Growth Free Cash Flow Margin Financial targets assume macroeconomic conditions remain consistent with conditions as of the time of this presentation. These revenue growth and free cash flow margin targets are forward-looking statements. Given the risks, uncertainties and assumptions related to PROS’ business and operations, PROS’ actual future results may differ materially from these targets. Investors should review the Company’s cautionary statements and risk factors referred to in this presentation and contained in the Company’s SEC filings.

© PROS, Inc. All rights reserved. Confidential and Proprietary Supplemental Business Metrics 26 Revenue Q4 '21 Q1 '22 Q2 '22 Q3 '22 Q4 '22 Q1 '23 Q2 '23 Q3 '23 Subscription $ 47,015 $ 48,765 $ 50,386 $ 51,763 $ 53,127 $ 55,969 $ 57,304 $ 59,987 Maintenance and Support $ 8,390 $ 7,855 $ 7,249 $ 7,071 $ 6,417 $ 5,712 $ 5,093 $ 4,693 Recurring Revenue $ 55,405 $ 56,620 $ 57,635 $ 58,834 $ 59,544 $ 61,681 $ 62,397 $ 64,680 Services $ 9,568 $ 9,872 $ 10,727 $ 11,514 $ 11,391 $ 11,501 $ 13,395 $ 12,570 Total Revenue $ 64,973 $ 66,492 $ 68,362 $ 70,348 $ 70,935 $ 73,182 $ 75,792 $ 77,250 Recurring Revenue % 85% 85% 84% 84% 84% 84% 82% 84% Revenue by Geography Q4 '21 Q1 '22 Q2 '22 Q3 '22 Q4 '22 Q1 '23 Q2 '23 Q3 '23 United States $ 22,866 $ 23,194 $ 23,908 $ 24,952 $ 26,307 $ 26,232 $ 27,224 $ 26,925 Europe $ 20,659 $ 20,823 $ 20,865 $ 20,816 $ 20,981 $ 22,949 $ 24,748 $ 25,691 Rest of World $ 21,448 $ 22,475 $ 23,589 $ 24,580 $ 23,647 $ 24,001 $ 23,820 $ 24,634 $ in 000s

© PROS, Inc. All rights reserved. Confidential and Proprietary Supplemental Business Metrics 27 Financial & Operating Metrics Q4 '21 Q1 '22 Q2 '22 Q3 '22 Q4 '22 Q1 '23 Q2 '23 Q3 '23 Non-GAAP Gross Margin1 63% 63% 64% 64% 65% 64% 65% 66% Non-GAAP Subscription Gross Margin1 75% 76% 76% 77% 77% 78% 78% 78% Non-GAAP Recurring Revenue Gross Margin1 75% 76% 76% 76% 77% 77% 77% 77% Adjusted EBITDA1 $ (6,356) $ (9,123) $ (5,970) $ (2,160) $ 2,382 $ (2,305) $ 148 $ 5,640 Total Cash and Cash Equivalents $ 227,553 $ 217,393 $ 215,178 $ 206,824 $ 203,627 $ 192,376 $ 184,567 $ 169,080* Recurring Deferred Revenue $ 96,133 $ 116,948 $ 103,510 $ 105,650 $ 105,468 $ 117,837 $ 111,688 $ 107,667 Total Deferred Revenue $ 106,266 $ 128,802 $ 115,485 $ 116,191 $ 116,957 $ 128,353 $ 121,583 $ 116,522 TTM Recurring Calculated Billings1 $ 213,699 $ 224,858 $ 228,255 $ 238,370 $ 241,968 $ 238,584 $ 250,634 $ 250,319 Remaining Performance Obligations2 $ 360,500 $ 433,100 $ 434,900 $ 442,300 $ 441,500 $ 430,600 $ 407,600 $ 403,900 Remaining Performance Obligations - Current $ 184,600 $ 201,100 $ 197,400 $ 199,300 $ 206,300 $ 210,000 $ 204,200 $ 199,000 Free Cash Flow1 $ (1,334) $ (11,475) $ (2,239) $ (9,067) $ 1,072 $ (4,519) $ (6,240) $ 8,494 Total Headcount (including contractors) 1,545 1,541 1,597 1,626 1,528 1,436 1,471 1,486 1) For definitions of non-GAAP measures or reconciliation of non-GAAP to GAAP measures, please refer to the appendix of this presentation. 2) Remaining performance obligations represent contractually committed revenue that has not yet been recognized, which includes deferred revenue and unbilled amounts that will be recognized as revenue in future periods. *Total Cash and Cash Equivalents in Q3 ’23 includes $10 million of restricted cash. $ in 000s

© PROS, Inc. All rights reserved. Confidential and Proprietary Q4 2023 Investor Events 29 Date Event Location November 9, 2023 Stifel Midwest 1x1 Growth Conference Chicago, IL November 16, 2023 Craig-Hallum Alpha Select Conference New York, NY November 16, 2023 Needham Virtual SaaS 1x1 Conference Virtual November 29-30, 2023 UBS Global Tech Conference Scottsdale, AZ

© PROS, Inc. All rights reserved. Confidential and Proprietary Our Mission: To Help People and Companies Outperform 31 We are INNOVATORS Thinking creatively to find new paths to success for our people, our customers, and our business. We CARE Putting people first - our customers, employees, partners, and community - it’s how our company was started, and how we’ll always run it. Looking for every opportunity to create a better PROS and a better experience for our customers, and we hold ourselves accountable. We are OWNERS

© PROS, Inc. All rights reserved. Confidential and Proprietary Governance, Security, & Environmental Sustainability 32 Governance • LEED Silver certified global HQ • Sustainable data centers worldwide through our partnership with Microsoft • Recycling program in all offices Security PROS Board of Directors and Executive team are committed to adhering to the highest ethical values and promoting transparency. For more detail and a complete list of governance documents and charters, visit the governance page of our website. For further disclosures, read our ESG report. At PROS, security is the responsibility of everyone. We take data security and privacy seriously. ✓ ISO 27001 Certified ✓ ISO 27018 Certified ✓ SOC1 Type 2 Certified ✓ SOC2 Type 2 Certified ✓ Cloud Security Alliance Compliant ✓ GDPR Compliant For more detail on security and compliance, including detail on all certifications we hold, visit the trust and security page of our website. Environmental Sustainability

© PROS, Inc. All rights reserved. Confidential and Proprietary Diversity & Inclusion 33 25% 25% 27% 26% 26% 29% 17% 21% 23% 24% 25% 33% 2017 2018 2019 2020 2021 2022 27% 30% 30% 29% 33% 37% 32% 35% 35% 36% 36% 2017 2018 2019 2020 2021 2022 PROS Employee Resource Groups (ERGs) Our ERGs are formed and led by employees, with company support, and any interested employee may join any group. Organized around common life experiences and backgrounds, they serve to champion our diversity initiatives and facilitate a workplace culture of equity and inclusion. Committed to a Diverse & Inclusive Environment We welcome and celebrate diverse perspectives, cultures and experiences. We are truly a ‘people first’ culture where every person is encouraged to bring their authentic selves to work and feel they belong and are valued. Our diversity in thought and action is what makes PROS a special place. Learn more Overall Representation % of All Employees Globally Management % of All Managers Globally Overall Representation % of All Employees U.S. Management % of All Managers U.S. Women at PROS Underrepresented Minorities in the U.S. 2022 figures based on 1,357 global employees as of 12/31/22 2022 figures based on 845 employees in the U.S. as of 12/31/22 Note: Underrepresented Minorities include AA, Hispanic and Multicultural For further disclosures on D&I at PROS, read our ESG report.

© PROS, Inc. All rights reserved. Confidential and Proprietary Supplemental Information – Explanation of Non-GAAP Measures 35 PROS has provided certain financial information that has not been prepared in accordance with GAAP. This information includes non-GAAP gross profit, non-GAAP gross margin, non- GAAP subscription gross margin, non-GAAP recurring revenue gross margin, adjusted EBITDA and free cash flow. PROS uses these non-GAAP financial measures internally in analyzing its financial results and believes they are useful to investors, as a supplement to GAAP measures, in evaluating PROS’ ongoing operational performance. Non-GAAP financial measures should not be considered in isolation from, or as a substitute for, financial information prepared in accordance with GAAP. Investors are encouraged to review the reconciliation of these non-GAAP measures to their most directly comparable GAAP financial measure. A reconciliation of GAAP to the non-GAAP financial measures has been provided in these tables and in the earnings press release. PROS' use of non-GAAP financial measures may not be consistent with the presentations by similar companies in PROS' industry. Non-GAAP gross profit: Non-GAAP gross profit is defined as GAAP gross profit less amortization of acquisition-related intangibles, severance and share-based compensation costs allocated to cost of subscription, maintenance and support, and services. Non-GAAP gross margin is calculated as the percentage of non-GAAP gross profit divided by total revenue. Non- GAAP subscription gross margin and recurring revenue gross margin are similarly calculated to compare the non-GAAP gross profit of subscription revenue and recurring revenue (subscription, maintenance and support revenue), respectively, to total subscription and recurring revenue, respectively. In calculating the non-GAAP gross profit of subscription revenue, the total costs of subscription are adjusted to reduce such costs by the portion of amortization of acquisition-related intangibles, severance and share-based compensation costs allocated to cost of subscription. In calculating the non-GAAP gross profit of recurring revenue, the total costs of subscription, maintenance and support are adjusted to reduce such costs by the portion of amortization of acquisition-related intangibles, severance and share-based compensation costs allocated to cost of subscription and cost of maintenance and support. Adjusted EBITDA: Adjusted EBITDA is defined as GAAP net income (loss) before interest expense, provision for income taxes, depreciation and amortization, as adjusted to eliminate the effect of stock-based compensation cost, severance, acquisition-related expenses, amortization of acquisition-related intangibles, and depreciation and amortization. Adjusted EBITDA should not be considered as an alternative to net loss as an indicator of our operating performance. Free Cash Flow: Free cash flow is a non-GAAP financial measure which is defined as net cash provided by (used in) operating activities, excluding severance payments, less capital expenditures (excluding expenditures for PROS new headquarters), purchases of other (non-acquisition-related) intangible assets and capitalized internal-use software development costs. Calculated Billings: Calculated billings is defined as total subscription, maintenance and support revenue plus the change in recurring deferred revenue in a given period.

© PROS, Inc. All rights reserved. Confidential and Proprietary Supplemental Reconciliation of GAAP to Non-GAAP Financial Measures – Guidance (In thousands, Unaudited) 36 Low High Adjusted EBITDA GAAP Loss from Operations $ (10,400) $ (9,400) Amortization of acquisition-related intangibles 1,400 1,400 Share-based compensation 10,900 10,900 Depreciation and other amortization 1,100 1,100 Adjusted EBITDA $ 3,000 $ 4,000 Q4 2023 Guidance Low High Adjusted EBITDA GAAP Loss from Operations $ (50,500) $ (49,500) Amortization of acquisition-related intangibles 6,200 6,200 Severance 3,600 3,600 Share-based compensation 42,500 42,500 Depreciation and other amortization 4,700 4,700 Adjusted EBITDA $ 6,500 $ 7,500 Full Year 2023 Guidance

© PROS, Inc. All rights reserved. Confidential and Proprietary Supplemental Information - GAAP to Non-GAAP Reconciliations (In thousands, Unaudited) 37 Gross Profit Q4'21 Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 GAAP Gross Profit $ 38,996 $ 39,131 $ 40,721 $ 42,738 $ 43,467 $ 43,640 $ 47,221 $ 48,786 Amortization of acquisition-related intangibles 752 1,983 1,685 1,555 1,441 1,337 1,243 1,099 Severance - - - - 245 749 - - Share-based compensation 926 825 1,006 1,050 1,017 832 985 1,033 Non-GAAP Gross Profit $ 40,674 $ 41,939 $ 43,412 $ 45,343 $ 46,170 $ 46,558 $ 49,449 $ 50,918 Non-GAAP Gross Margin 63% 63% 64% 64% 65% 64% 65% 66% Subscription Gross Profit Q4'21 Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 GAAP Subscription Gross Profit $ 34,109 $ 34,986 $ 36,640 $ 37,934 $ 39,442 $ 41,876 $ 43,245 $ 45,477 Amortization of acquisition-related intangibles 752 1,983 1,685 1,555 1,441 1,337 1,243 1,099 Severance - - - - 8 125 - - Share-based compensation 207 151 185 174 148 125 169 201 Non-GAAP Subscription Gross Profit $ 35,068 $ 37,120 $ 38,510 $ 39,663 $ 41,039 $ 43,463 $ 44,657 $ 46,777 Non-GAAP Subscription Gross Margin 75% 76% 76% 77% 77% 78% 78% 78% Recurring Revenue Gross Profit Q4'21 Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 GAAP Recurring Revenue Gross Profit $ 40,446 $ 40,674 $ 41,901 $ 43,053 $ 43,962 $ 45,306 $ 46,462 $ 48,401 Amortization of acquisition-related intangibles 752 1,983 1,685 1,555 1,441 1,337 1,243 1,099 Severance - - - - 8 432 - - Share-based compensation 343 242 283 283 266 205 267 294 Non-GAAP Recurring Revenue Gross Profit $ 41,541 $ 42,899 $ 43,869 $ 44,891 $ 45,677 $ 47,280 $ 47,972 $ 49,794 Non-GAAP Recurring Revenue Gross Margin 75% 76% 76% 76% 77% 77% 77% 77% Adjusted EBITDA Q4'21 Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 GAAP Loss From Operations $ (21,639) $ (26,503) $ (20,537) $ (16,181) $ (14,873) $ (18,796) $ (13,355) $ (7,842) Acquisition-related expenses 2,386 - - - - - - - Amortization of acquisition-related intangibles 1,420 2,975 2,597 2,221 1,973 1,806 1,620 1,446 Severance - 1,508 - - 4,034 3,586 - - Share-based compensation 9,665 11,225 10,766 10,626 10,097 9,904 10,752 10,933 Depreciation and other amortization 1,812 1,672 1,204 1,174 1,151 1,195 1,131 1,103 Adjusted EBITDA $ (6,356) $ (9,123) $ (5,970) $ (2,160) $ 2,382 $ (2,305) $ 148 $ 5,640 Free Cash Flow Q4'21 Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 Cash Flow From Operations $ (970) $ (11,014) $ (1,931) $ (8,991) $ (1,970) $ (6,413) $ (6,542) $ 8.718 Severance - - - - 3,058 3,170 579 121 Purchase of property and equipment (excluding new headquarters) (364) (461) (308) (76) (16) (1,546) (277) (345) Free Cash Flow $ (1,334) $ (11,475) $ (2,239) $ (9,067) $ 1,072 $ (4,519) $ (6,240) $ 8,494

PROS (PRO) 8-KPros Holdings, Inc. Reports Third Quarter 2023 Financial Results