#14Q 2022 Financial Results BIGCOMMERCE#2B Disclaimer This presentation has been prepared by BigCommerce Holdings, Inc. ("we," "us," "our," "BigCommerce" or the "Company"). This presentation may contain forward-looking statements which constitute the views of the Company with respect to future events which can be identified by the use of forward-looking terminology such as "anticipate," "believe," "budget," "can," "continue," "committ," "control," "could," "estimate," "expect," "intend," "may," "ongoing," "plan," "potential," "predict," "project," "should," "will," "target" and similar words or phrases. These forward-looking statements include statements concerning the following: the impact of the COVID-19 pandemic and the associated economic uncertainty on the Company, our customers, and our partners, and our response thereto; our expectations regarding our revenue, expenses, sales, and operations; anticipated trends and challenges in our business and the markets in which we operate; our ability to compete in our industry and innovation by our competitors; our ability to anticipate market needs or develop new or enhanced services to meet those needs; our ability to manage growth and to expand our infrastructure; our ability to establish and maintain intellectual property rights; our ability to manage expansion into international markets and new industries; our ability to hire and retain key personnel; our ability to successfully identify, manage, and integrate any existing and potential acquisitions; our ability to adapt to emerging regulatory developments, technological changes, and cybersecurity needs; and our anticipated cash needs and our estimates regarding our capital requirements and our need for additional financing; and such other risks and uncertainties described more fully in our documents filed with or furnished to Securities and Exchange Commission, including our Annual Report on Form 10-K for the year ended December 31, 2021 as filed with the SEC on March 1, 2022, our Quarterly Report on Form 10-Q filed with the SEC on November 4, 2022, and the future annual, quarterly and current reports that we file with the SEC. The statements are made based upon management's beliefs and assumptions and on information available to management as of the date of this presentation. Forward-looking statements involve both known and unknown risks, and there is no assurance that such statements are correct or will prove, with the passage of time, to be correct. Actual events, results, achievements or performance may differ materially from those reflected, implied or contemplated by such forward looking statements. All forward-looking statements attributable to us are expressly qualified by these cautionary statements. Any past performance information presented herein is not a guarantee or indication of future results and should not be relied upon for such reason. The information contained herein may change at any time without notice, and we undertake no duty to update this information except as required by law. This presentation also contains estimates and other statistical data made by independent parties and by us relating to market size and other data about our industry. This data involves a number of assumptions and limitations, and you are cautioned not to give undue weight to such data and estimates. In addition, projections, assumptions and estimates of our future performance and the future performance of the markets in which we operate are necessarily subject to a high degree of uncertainty and risk. Neither we nor our affiliates, advisors or representatives makes any representation as to the accuracy or completeness of that data or undertake to update such data after the date of this presentation. In addition to financial information prepared in accordance with generally accepted accounting principles in the United States ("GAAP"), we use certain non-GAAP financial measures to clarify and enhance our understanding, and aid in the period-to-period comparison, of our performance. We believe that these non-GAAP financial measures provide supplemental information that is meaningful when assessing our operating performance because they exclude the impact of certain amounts that our management and board of directors do not consider part of core operating results when assessing our operational performance, allocating resources, preparing annual budgets, and determining compensation. The non-GAAP measures have limitations, including that they may not be directly comparable to other companies, and you should not consider them in isolation or as a substitute for or superior to our GAAP financial information. See the Appendix to this presentation for a reconciliation of non-GAAP financial measures to their nearest GAAP equivalent. 2#3Who is BigCommerce#4BCompany overview BigCommerce is the Open SaaS platform for all stages of ecommerce growth BigCommerce is the premier open SaaS platform for ecommerce We enable merchants to run best-of-breed technology solutions without friction ▸ We're growing enterprise rapidly We're the leader in omnichannel selling, helping merchants boost sales regardless of their size or existing platform LETRA ProGlide Shield FREE Cent 4812 Gillette $22 W ADD TO CART UPLIFT DESK s Skullcandy BADGLEY MISCHKA GET STARTED PRODUCTS SHAVING TIPS Get everything you need to start looking and feeling your best when you subscribe to your favorite razor. SHOP NOW THERE'S A BEST FOR EVERY MAN. solo stove ABOUT GIFTS LIMITED TIME OFFER: Receive a free travel case with any ProGlide or ProGlide Shield purchase LONDON Gillette TED BAKER How It Works NATORI Leica berlin PACKAGING Login Ⓒ LONDON MOLTON BROWN scJohnson Q1- PETER CHRISTIAN#5Company overview BigCommerce at 12/31/22 $312M ARR +16% 4Q22 | +48% 4Q21 +41% 4Q20 $ Consistent revenue growth +12% 4Q22 | +50% 4Q21 +27% 2022 | +44% 2021 30% enterprise account ARR growth ㅏ ~t 76% Q4'22 non- GAAP gross margin $ Customer Target Segments Enterprise Mid-market target: $1M-$50M GMV Large enterprise target: $50M+ 72% of account ARR Non-enterprise SMB target: <$1M GMV 28% of account ARR Note: All statistics as of 12/31/2022 unless otherwise noted and include impact of the acquisition of Feedonomics. $224M Enterprise ARR 72% of total $312M ARR $38,708 enterprise account ARPA +13% 4Q22 | +15% 4Q21 5,786 enterprise accounts +15% 4Q22 | +50% 4Q21 2022 international store launches Notable international brand launches included British Airways IAG Loyalty, Jimmy Brings, MKM Building Supplies, Industrial Tool Supplies, and Mexico's Chivas Soccer Club. 5#6BigCommerce enterprise accounts @ IPO vs today Enterprise accounts Mid-market target: $1-50M GMV Large enterprise target: $50M+ GMV Non-enterprise accounts SMB target: <$1M GMV $90M Note: statistics as of 12/31/22 $77M 3Q20 (IPO) Enterprise account ARR Retail account ARR 54% of account ARR Average revenue per enterprise account: $28,370 46% of account ARR $224M $88M 4Q22 72% of account ARR Average revenue per enterprise account: $38,708 28% of account ARR BigCommerce's enterprise business has grown rapidly in the brief time since IPO, driven by our key business strategy: disrupting legacy enterprise ecommerce.#7B FINANCIALS Enterprise ARR has grown at a 30%+ rate for the past 20 consecutive quarters and a 50% CAGR over the last three years. +41% YoY $35 +32% +37% $38 +41% +44% $46 $42 +46% $51 $55 +44% Note: growth rates represent organic + inorganic growth $61 +44% +40% $67 $71 +44% $80 IPO +48% $90 +51% ■ Enterprise ARR $mil $101 +58% $112 +78% +54% $160 $123 +72% *Note: Q3 2022 marks the 1 year anniversary of the Feedonomics acquisition $173 +68% $189 +68% $207 +35% || 11 1Q18 2018 3Q18 4Q18 1Q19 2Q19 3Q19 4Q19 1Q20 2Q20 3Q20 4020 1021 2021 3Q21 4Q21 1Q22 2Q22 3Q22 4Q22 $216 +30% $224#8The market BigCommerce serves#9B FINANCIALS Global ecommerce momentum continues to accelerate and gain long-term share over brick and mortar Adoption of ecommerce is accelerating 19% $5,075 19% $5,437 20% $5,920 2021 2022 Retail ecommerce spend ($bil) 2023 21% $6,478 22% $7,046 23% Sources: eMarketer, Dec 2022; Morgan Stanley Research; William Blair Research $7,619 2024 2025 2026 Retail ecommerce (% of global retail spend) Many enterprises use ‘monolithic' legacy ecommerce platforms that need to be replaced for more modern and flexible architecture Headless and composable commerce architecture makes implementing new ecommerce software for B2C and B2B merchants easier than the old rip-and- replace model#10BAddressable market: platform spend BigCommerce serves B2C and B2B merchants all on one platform Ecommerce platform spend forecasted to grow to $13.5B in 2026 Worldwide digital commerce applications revenue by deployment ($Bn) 7.0 8.0 9.2 10.5 12.0 13.5 2021A 2022E 2023E 2024E 2025E 2026E ■On-premise/other software ■Public cloud services (own IP) Source: IDC Worldwide Digital Commerce Applications Revenue Snapshot, May 2022. 21% CAGR (1%) CAGR 4 Enterprises are choosing Cloud/SaaS over on-premise software 4 BigCommerce uniquely combines the flexibility of open-source with API-first composability and the benefits of multi- tenant SaaS B2B application revenue spend is growing faster than B2C, and BigCommerce enables merchants to run B2B and B2B or a hybrid version on one platform 10#11BAddressable market: platform spend + digital marketing + major PSR components Addressable market expanding beyond platform spending $28BN TAM $BN TAM 30 25 20 15 10 5 0 2021E ■Platform 2022E 2023E ■ Digital marketing / Omni ■Apps ■Shipping 2024E Payments 2025E Gross Margins¹ 95%+ 100% 75% Note: ¹ Gross margins represent BIGC estimates based on net revenue recognition on PSR Sources and assumptions: (1) Tech platform spending based on IDC Worldwide Digital Commerce Applications Revenue Snapshot, 2021; (2) Digital marketing / Omnichannel spending based on eMarketer, March 2021, assuming US ecommerce ad spending is approximately 50% of global, with 2% addressable by BIGC through Feedonomics; (3) App TAM assumed to be equal to tech platform spending reflecting potential BIGC 20% revenue share; (4) Shipping and payments spending based on Grand View Research market size studies from May and June 2021; assuming 2% and 10% addressable, respectively. 11#12The BigCommerce go to market strategy#13B Growth strategy BigCommerce Strategic Focus STRATEGIC INITIATIVES STRATEGY PILLARS # Enterprise International Omnichannel Open SaaS Disruptive Tech A B2B Composable Commerce- as-a-Service 13#14BOMNICHANNEL Merchants want to be able to sell more everywhere. G 4 Accelerate growth by easily listing products across social channels, marketplaces, search engines and new regions. Drive channel performance through accurate and optimized listings. Elevate customer experience through consistent listings, up-to-date inventory levels and automated order syncing for fast fulfillment. Increase operational efficiency with a combination of automated and managed services. TED BAKER LONDON PUMA SONOS ♥CVS Health. ebay amazon More GMV 3 Better customer experience ay Higher conversion Improved data and listings 100+ ad, social, and marketplace channels More traffic f Increased views and ROAS D All trademarks and logos are the property of their respective owners O 3#15B2B buyers across industries expect a modern experience similar to what B they see in consumer-focused ecommerce Publishing, Printing, IT & Electronics Industrial & Ag Supply Food, Beverage & CBD Healthcare, Medical & Safety Supply Apparel, Sports & Outdoors Harvard Business Publishing Corporate Learning Homegoods & Building Supply FARMER BOY amtouch DENTAL SUPPLY KELTY Manufacturing berlin PACKAGING HKⓇ ckfoods living sherrilltree SIEMENS Healthineers USCutter McDurmon ML XGREEN ROADS® BEER ResMed MANN LAKE BEE & AG SUPPLY suppliesoutlet VERTICAL PPE Black Diamond BOBUX @diono Lifetime Brands TECTRAN® Driven to be BETTER BARRON DESIGNS Rainbow ECOScience CANDY CLUB SafetyCulture NATORI ascdirect.co.uk THE ON-LINE PACKAGING COMPANY Interform. EMPIRE Moulding & Millwork AMINO Building Products Company HANNA linstruments Clarion WWALTON'S Everything but the Meat S SILK WORLDWIDE GIRL & DUG SAN DIEGO PORTLAND UDSON LASTENERS MUNGSONYRSTEDERS.COM 1-877-44 SCREW ATS Advanced Technology Services, Inc. PREMIER SAFETY FUJITSU DELECTRONICS GZS TOBEN HSWHOLESALE JUUL MASTER DISTRIBUTOR PAN ANUFACTURING GILDAN Orangetheory panache BRANDS COOKBOARDMAN GROUP BOXHUB. psi AORN ACLS SAFE SURGERY TOGETHER DuraMark Technologies The Chas. E. Phipps Company#16Strategic Initiative 4 Composable for enterprise ecommerce seeking the most modern approach to technology For enterprise customers, now more than ever, flexibility and composability are especially important: freedom to mix, match and combine best of breed tech solutions to create a more customized and robust technology stack. B2C and B2B merchants can now create the most modern customer experiences and enterprise grade solutions without limitations or complexity. MKM Mountain Equipment Company Mc ALLIANCE Kōkatat TED BAKER LONDON GOREWEAR LARQ MITOQ KO SPICEOLOGY solo stove YETI C 4 C Le Murad. bensons for beds 19SPORTS ●●● FOUR PILLARS LA PERIA SOG STUDIES AND OBSERVATIONS GROUP Fortune Brands A home and security company#17B COMPOSABLE (HEADLESS) Customer snapshot by integration NEXT. Gatsby NuxtJS WORDPRESS contentful CONTENTSTACK @algolia b bloomreach Olie petit planet FORCITE VP VIDEOPRO K₂ Black Diamond holly yashi SPICEOLOGY Airomé LONDON unu TED BAKER MITOQ solo stove Spencil. Good Beautiful 19SPORTS YETI Mountain Equipment Company CYCL 2 5 LA PERIA HK GOREWEAR LARQ springbok MKM CANDLE WARMERS OURA URBAN JUNGLE Kōkatat THE SCHOOL OF LIFE bensons for beds Murad. Since 1963 APPELLES. FOUR PILLARS SOG STUDIES AND OBSERVATIONS Fortune Brands A home and security company#18B Commerce-as-a-Service Enable commerce anywhere, powered by BigCommerce 4 BigCommerce enables partners to create and sell customized commerce solutions powered by our platform technology. Ability to go-to-market with partners to serve more merchants in more ways and more places Tailor ecommerce to the specific needs of a category or use case ↓↑ L' avasam clover Cross-sell ecommerce fully integrated with a technology, application or service Payu silk WINE DIRECT InfoTrax Localize BigCommerce anywhere in the world in terms of sales, marketing, service UNBOUND COMMERCE Jmango Extend commerce to mobile apps, devices, form factors, and virtual use cases Zarla Embed ecommerce trial experiences within an existing offering 18#19Health & Beauty Apparel Home & Garden Food & Beverage Sports & Outdoors Strong enterprise customers across multiple verticals Chap Stick IVORY XGREEN ROADS Nature's One MOLTON BROWN LONDON Electronics FUJITSU NOKIA | Phones Automotive B2B & Industrial TED BAKER LONDON ONE KINGS LANE Carluccio's .COM KING BAKING TIENDA CLUB PUEBLA ARTHU GORE DUXIANA COMPANY TUNING ESTEUROSPORT WEAR Mrs 12 SPORTS. BEER CARTEL WA birdsnest SHARP Appliances MEYER'S CLEAN DAY M AWESOME VW AUDIGROUP SPECIALISTS NATORI 5-hour Sammes RENERGY CANDIES Tienda Chivas motorola defy bensons beds SINCE 1885 CARILOHA ROCK GOLF BOLTOM PRIORITY TIRE FARMER BOY GILDAN MKM Harvard Business BRANDS BUILDING SUPPLIES Nikon Publishir LA PERIA BURROW BLACKBERRY FARMSHOP musicdirect Leica vodafone pure barre PERFORMANCE, MITOQ KYOCERA SGS Precision Tools PETER CHRISTIAN Winstanleys Pramworld dippine dots CREAM YETI STG LARQ sportbiketrackgear.com Black Diamond mountain rose herbs GRENSON ENGLAND 1366 BRICKHOUSE SECURITY. Reebok Mountain Equipment Company VAN CAFE fort collins, colorado AMERICAN Big Green Egg solo stove LEATHER The Ultimate Cooking Experience • Skullcandy victoriahealth marucci JOHNNIE WALKER THE WINE FLYER BEN&JERRY'S 33 ABI AND JOSEPH TECTRAN UNITED Driven to be BETTER 36 WHEELS www.bbwheelsonline.com CAT™ HKⓇ living ResMed TOTTENHAM HOTSPUR mazda berlin PACKAGING#20BackOffice, PIM, B2B, Hosting CMS BACKOFFICE PEOPLEVOX Brightpearl SKUVAULT LINNWORKS An incredible ecosystem of best of breed partner solutions OMNISTOCK B2B KATANA bundlebzb behalf PIM Acumatica skubana xentral ORACLE NETSUITE netlify CMS/HOSTING/HEADLESS logicbroker. CREDIT KEY TradeCentric Jmango Formerly PunchOut200 o bloomreach CONTENTSTACK™ contentful ✔Vue Storefront magnolia STYLA shōgun Acquia prismic B storyblok DEITY FALCON uniform Vercel sales layer akeneo inRiver FRONT. COMMERCE umbraco Sage FedEx. Plytix pimberly Insights, Tax & Accounting TAX & ACCOUNTING Avalara AvaTax quickbooks VERTEX xero INSIGHTS Pay Helm Segment Fueled Google Big Query 1 Shipping Omnichannel SHIPPING & FULFILLMENT MARKETPLACES & AD PLATFORMS Instagram ShipStation SHIPPERHQ! ROUTE Google Shopping facebook TikTok P Target+ ebay ShipBob shippo parcelLab Microsoft amazon Bu libre 90+ PREFERRED & ELITE DHL Globale sendcloud Happy Returns by PayPal Digital River DROPSHIPPING huboo avasam spocket Odoba Payments & FinTech PAYMENTS PayPal affirm) stripe narvar Braintree adyen worldpay Klarna. mollie barclaycard authorize.net cybersource A Visa Solution A Visa Solution PARTNERS checkout.com mercado pago nexi Opayo Payu WALLETS & ACCELERATED CHECKOUT PayPal amazon pay G Pay Pay BOLT B Walmart MULTICHANNEL LISTINGS / FEEDS feedonomics codisto channelengine ADVERTISING CAMPAIGN MANAGEMENT Sales & Orders POS TEAMWORK COMMERCE clover BigCommerce PARTNER mercado ROI HUNTER OMS fluentcommerce deckcommerce 1,000+ APPS @posnow □ Square DYNAMIC CREATIVE Zettle by PayPal PIPE17 Marketing Automation EMAIL & MARKETING AUTOMATION dotdigital sendlane omnisend Constant Contact klaviyo Privy attentive mailchimp LOYALTY, REVIEWS & UGC. AANNEX CLOUD yotpo. Stamped LOYALTY & REWARDS smile.io LOYALTYLION INTELLIGENT MERCHANDISING bloomreach nosto searchspring hawksearch By Bridgeline RATINGS & REVIEWS dynamic yield segmentify FAST SIMON Formerly InstantSearch+ CUSTOMER SUPPORT & CRM yotpo. ★ Trustpilot J Judge.me MOBILE algolia Attragt SHOPGATE A KLEVU LiveChat zendesk gorgias HubSpot UNBOUND JMANGO COMMERCE Stamped. REVIEWS & RATINGS 50+ INDUSTRY CATEGORIES 20#21Financials#22BigCommerce Enterprise accounts "Enterprise accounts" have at least one contracted enterprise plan. These accounts do a minimum of $1M GMV per year and scale into hundreds of millions and higher. Enterprise accounts: (a) require custom-negotiated, multi-year contracts (b) include custom negotiated contract terms (liability limits, info sec, etc) (c) want technical and professional services offerings, and (d) often conduct detailed RFPs with custom requirements#23B Strong enterprise and mid-market growth as customer mix continues to shift further towards larger B2C and B2B merchants 48% ởcº Enterprise account ARR as a % of total ARR 46% 52% 53% 54% 44% 41% 43% 56% 57% 59% 37% 36% 33% Enterprise account ARR 63% 64% 67% 30% Retail account ARR 29% 28% 1Q20 2Q20 3Q20 4Q20 1Q21 2Q21 3Q21 4Q21 1Q22 2Q22 3Q22 4Q22 70% 71% 72% +40% YOY $71M Enterprise account ARR ($M) +44% $90M $80M +54% +58% $123M +51% $112M +48% $101M +68% +72% $189M *Note: Q3 2022 marks the 1 year anniversary of the Feedonomics acquisition +78% $173M $160M +68% $207M +35% $216M +30% $224M 1Q20 2Q20 3Q20 4Q20 1Q21 2Q21 3Q21 4Q21 1Q22 2Q22 3Q22 4Q22 23#24Top line growth outpacing broader ecommerce growth rates (Driven by continued strength in enterprise accounts) +22% YOY $112M $29M $83M 2019 +36% $152M $49M $104M 2020 y/y: Subscription Services 17% y/y: Partner and Services 38% 25% 65% Subscription Services Note: Amounts may not add due to rounding. +44% $220M $65M $155M 2021 49% 33% Partner and Services +27% $279M $73M $206M 2022 33% 13% +30% YOY $36M $33M $10M +33% $40M $12M +39% $47M +41% $43M $13M $27M $13M +35% +41% $49M $30M $15M $15M $32M $34M +49% $59M $17M *Note: Q3 2022 marks the 1 year anniversary of the Feedonomics acquisition $42M +42% +50% $66M $65M $18M $18M $47M $48M +22% +12% +39% $72M $72M $68M $17M $19M $19M $51M $53M $53M $24M 524M 1Q20 2Q20 3Q20 4Q20 1021 2021 3Q21 4Q21 1Q22 2Q22 3Q22*4Q22 2% 19% 26% 33% 36% 42% 59% 58% 50% 51% 26% 14% 52% 74% 82% 54% 52% 22% 30% 34% 23% 12% 12% 6% 24#25Maintaining gross margins in the mid to high 70s, while investing in additional service capabilities for both BigCommerce and Feedonomics Non-GAAP gross profit ($M) +22% YOY $85M 2019 % of total revenue: 76% Non-GAAP gross profit ($M) +40% $119M 2020 78% +46% $174M 2021 79% +23% $213M 2022 76% 79% 78% GM $29M $26M 81% 77% $38M 79% $33M $31M 80% $39M 80% $47M 76% 75% $49M $50M 77% 76% 77% $56M $55M $52M 1Q20 2Q20 3Q20 4Q20 1Q21 2Q21 3Q21 4Q21 1Q22 2Q22 3Q22 4Q22 Note: Non-GAAP gross profit and gross margin exclude the effect of stock-based compensation and related payroll tax expense. See appendix for reconciliation of Non-GAAP measures to GAAP. 25#26Driving leverage while investing in significant growth initiatives (Targeting profitability in Q4'23) Non-GAAP operating expense as % of revenue 19% 38% 53% 2019 Operating margin: (34%) 21% 30% 45% 2020 (18%) 21% 27% 41% 2021 (10%) 22% 27% 44% 2022 (17%) (19%) (17%) (18%) (18%) 18% 32% Non-GAAP operating expense as % of revenue 20% 21% 30% 29% 47% 45% 46% Research & Development 22% 29% 43% (7%) (9%) 20% 21% 41% 26% 27% 25% (6%) 41% 20% General & Administrative (18%) (19%) (20%) 23% 22% 28% 28% 41% 43% 23% 28% (16%) 46% 45% 23% 26% Sales & Marketing Note: Non-GAAP operating expenses and operating margin exclude the effect of stock-based compensation and related payroll tax expense. See appendix for reconciliation of Non- GAAP measures to GAAP. Amounts may not add due to rounding. (13%) 21% 1Q20 2Q20 3Q20 4Q20 1Q21 2Q21 3Q21 4Q21 1Q22 2Q22 3Q22 4Q22 26% 44% 42% 26#274 4 Consistent merchant cohort growth, driven by increases in GMV and enterprise net revenue retention As merchants transact and grow in GMV, net revenue retention improves for SMB, mid- market, and enterprise base Strong LTV to CAC ratio of 3.8:1 for 2022 NRR for enterprise accounts was 111% in 2022 2016 ■ Pre-2017 2017 Annual Merchant Billings by Cohort 2018 2019 2017 cohort 2018 cohort 2019 cohort 2020 2021 2022 2020 cohort 2021 cohort ■2022 cohort Note: Annual Merchant Billings by Cohort includes both subscription plan revenue and partner and services revenue for the enterprise account cohort that joined the platform in the indicated period. 27#28Key Metrics 1 Annual revenue run-rate 2 Subscription annual revenue run-rate 3 Annual revenue run-rate for enterprise accounts 4 Enterprise accounts as a percent of annual revenue run-rate 5 Average revenue per account for enterprise accounts 6 Number of enterprise accounts 28#29BARR growth continues to outpace that of global ecommerce due to new merchant bookings and high retention of existing base... (as of 12/31/22) +25% $115M | Q2 +22% YoY $108M Q1 +26% $121M 2019 Q3 +27% $152M $137M +26% $129M 1 Q4 Q1 +32% $167M Q2 Total ARR ($M) +38% $181M 2020 +43% +41% $196M Q3 Q4 Q1 +38% $209M Q2 +48% +52% $269M $254M 2021 Q3 Q4 +41% +43% $296M $280M Q1 Q2 +20% +16% $305M $312M 2022 Q3 *Note: Q3 2022 marks the 1 year anniversary of the Feedonomics acquisition Note: Annual revenue run-rate ("ARR") is calculated as the sum of: (1) contractual monthly recurring revenue at the end of the period, which includes platform subscription fees, invoiced growth adjustments, feed management subscription fees, recurring professional services revenue, and other recurring revenue, multiplied by twelve to prospectively annualize recurring revenue, and (2) the sum of the trailing twelve-month non-recurring and variable revenue, which includes one-time partner integrations, one-time fees, payments revenue share, and any other revenue that is non-recurring and variable. Q4 29#30...with Subscription ARR continuing healthy growth despite macroeconomic B challenges... (as of 12/31/22) 2 $84M Q1 $89M $94M Q2 2019 Q3 +23% YoY $99M Q4 +24% $104M Q1 +28% 5114M Q2 Subscription ARR ($M) +31% $123M 2020 Q3 +34% $133M Q4 +37% $143M Q1 +34% $153M Q2 +57% $193M 2021 Q3 +54% $204M Q4 +48% +49% $226M $212M Q1 Q2 +17% +21% $233M $238M 2022 *Note: Q3 2022 marks the 1 year anniversary of the Feedonomics acquisition Note: "Subscription annual revenue run-rate" is calculated by subtracting the trailing twelve months of partner and services revenue from Total annual revenue run-rate Q3 Q4 30#31...and continued tailwinds from enterprise accounts, growing 30% year over year... (as of 12/31/22) 3 +46% $51M $55M +44% YoY Q1 Q2 2019 +44% $61M Q3 +40% +44% $67M $71M 1 1 Q4 Q1 +44% $80M Q2 Enterprise ARR ($M) 2020 +48% $101M $90M +58% +51% $112M Q3 Q4 *Note: Q3 2022 marks the 1 year anniversary of the Feedonomics acquisition Note: Enterprise accounts represent any account with at least one BigCommerce enterprise plan Q1 +54% $123M Q2 +78% $173M $160M 2021 Q3 +72% $189M +68% +68% $207M Q4 Q1 +35% $216M +30% $224M Q2 Q3* Q4 2022 31#32B...primarily driven by momentum from enterprise accounts (as of 12/31/22) 47% Q1 48% Q2 50% 2019 Q3 52% Q4 % of ARR attributable to enterprise accounts 52% Q1 53% Q2 54% 2020 Q3 56% Q4 Note: Enterprise accounts represent any account with at least one BigCommerce enterprise plan 57% Q1 59% Q2 63% 2021 Q3 64% Q4 67% Q1 70% Q2 71% 2022 Q3 72% Q4 32#33BAverage revenue per enterprise account growing consistently year over year (as of 12/31/22) 5 +27% YoY $21.0k Q1 +25% $21.9k Q2 +24% $23.2k 2019 Q3 +22% $24.4k Q4 ARPA attributable to enterprise accounts ($k) +19% $25.1k Q1 +23% +22% $29.9k +23% $28.4k $26.9k Q2 2020 Q3 Q4 +17% +17% $33.3k +26% $31.6k $31.4k Q1 Q2 2021 Q3 +15% $34.3k Q4 +22% $38.1k +12% $35.2k Q1 +17% +13% $38.9k $38.7k Q2 2022 Q3 Note: Average revenue per account ("ARPA") for enterprise accounts is calculated at the end of a period by including customer-billed revenue and an allocation of partner and services revenue, where applicable. Q4 33#34(as of 12/31/22) 6 Enterprise accounts continue to grow into larger share of total business +13% YoY 2.4k Q1 +17% 2.5k Q2 2019 +17% 2.6k Q3 +17% 2.7k Q4 +17% 2.8k Q1 Number of enterprise accounts ($k) +17% 3.0k Q2 +21% 3.2k 2020 Q3 +23% 3.4k Q4 +32% +26% 3.9k 3.6k Q1 Q2 +52% 4.8k 2021 Q3 +51% +38% 5.4k +50% 5.4k 5.0k Q4 Q1 Q2 *Note: Q3 2022 marks the 1 year anniversary of the Feedonomics acquisition Note: Enterprise accounts represent any account with at least one BigCommerce enterprise plan. Year-over-year growth rates may not compute due to rounding. +16% 5.6k 2022 Q3 +15% 5.8k Q4 34#35Investment highlights Large and growing addressable market Strong, long-term secular tailwinds tied to digital commerce with TAM expanding beyond ecommerce platform spending in the US and abroad Open SaaS Disruptive platform and partner approach that prioritizes enterprise functionality, best of breed technologies and freedom of choice for all merchants Consistent revenue growth Revenue mix shift to mid-market and enterprise customers driving durable, consistent revenue growth and strong unit economics Strong gross margins High margin revenue share from established partnership agreements has driven consistently high gross margins Increasing operating leverage Continuing to invest in long-term growth opportunities while managing spend effectively 35#36Appendix#37GAAP income statement Figures in thousands Revenue Cost of Revenue Gross Profit Operating Expenses Sales & Marketing (1) Research & Development -(-1) General & Administrative Acquisition Related Expenses Restructuring Charges Amortization of Intangible Assets Total Operating Expenses Loss from Operations (1) (1) Interest Income Interest Expense Change in Fair Value of Financial Instruments Other Expense Loss Before Provision for Income Taxes Provision for Income Taxes Net Loss .........…………….. (1) Includes stock-based compensation. ....... Year Ended December 31, 2022 2021 $219,855 48,479 171,376 99,350 64,547 56,839 23,299 3,284 247,319 (75,943) 130 (828) (70) (76,711) (34) ($76,677) $279,075 69,980 209,095 134,794 88,253 75,989 35,216 7,332 8,078 349,622 (140,567) 4,198 (2,828) (227) (139,424) 495 ($139,919) Three Months Ended December 31, 2022 2021 $64,897 16,641 48,256 30,284 19,755 17,750 12,400 1,882 82,071 (33,815) 65 (703) (88) (34,541) (297) ($34,244) $72,431 18,492 53,939 33,871 22,669 18,963 3,775 7,332 2,016 88,626 (34,687) 2,068 (708) 601 (32,726) 254 ($32,980) 37#38Non-GAAP reconciliation Figures in thousands Gross Profit GAAP Gross Profit Stock-based Compensation (¹) Non-GAAP Gross Profit Non-GAAP Gross Margin Sales & Marketing GAAP S&M Expense Stock-based Compensation(¹) Non-GAAP S&M Expense Non-GAAP S&M as % of Revenue Research & Development GAAP R&D Expense Stock-based Compensation (¹) Non-GAAP R&D Expense Non-GAAP R&D as a % of Revenue General & Administrative GAAP G&A Expense Stock-based Compensation (¹) Non-GAAP G&A Expense Non-GAAP G&A as % of Revenue Operating Income GAAP Operating Income Stock-based Compensation (¹) Q1'21 $37,410 415 $37,825 81% $20,809 1,644 $19,165 41% $13,535 1,267 $12,268 26% $11,608 2,093 $9,515 20% ($8,542) 5,419 Q2'21 Q3'21 $38,828 $46,882 545 $39,373 80% ($3,123) (7%) $22,157 2,113 $20,044 41% $14,725 1,526 $13,199 27% Acquisition Related Costs Restructuring Charges Amortization of Intangible Assets Non-GAAP Operating Income Non-GAAP Operating Margin (1) Includes payroll tax associated with stock-based compensation expense. 310 $47,192 80% $26,101 2,010 $24,091 41% $13,110 $14,370 2,753 2,349 $10,357 $12,021 21% 20% ($4,227) (9%) $16,532 1,624 $14,908 25% ($12,271) ($21,315) $6,937 1,107 $6,293 9,792 1,402 ($3,828) (6%) Q4'21 2021 $48,256 $171,376 852 2,122 $49,108 $173,498 79% 76% $30,284 2,477 $27,807 43% $99,350 $32,173 8,244 $91,106 41% 2,632 $29,541 45% Q1'22 $48,947 868 $49,815 75% $19,755 $64,547 $20,944 1,753 6,170 2,563 $18,003 $58,377 $18,381 28% 27% 28% $17,750 $56,839 2,805 9,999 $14,945 $46,840 23% 21% 1,882 3,284 ($11,647) ($22,825) (18%) (10%) ($33,815) ($75,943) ($36,179) 7,887 26,535 9,108 12,400 23,299 12,660 Q2'22 Q3'22 $51,343 $54,866 987 1,091 $52,330 $55,957 77% 77% 2,037 ($12,374) (19%) $34,348 3,174 $31,174 46% $17,312 $19,211 $20,503 3,045 3,731 3,651 $14,267 $15,480 $16,852 22% 23% 23% $22,394 $22,245 3,042 3,144 $19,352 $19,101 28% 26% $34,402 $33,871 2,899 3,332 $31,503 $30,539 44% 42% ($39,140) 10,934 12,521 ($30,560) 10,785 6,260 Q4'22 2022 $53,939 $209,095 1,280 4,226 $55,219 $213,321 76% 76% 2,009 2,016 ($13,676) ($11,499) (20%) (16%) $134,794 12,037 $122,757 44% $22,669 $88,253 3,639 12,388 $19,030 $75,865 26% 27% $18,963 3,908 $15,055 21% $75,989 14,335 $61,654 22% ($34,687) ($140,567) 12,159 42,986 3,775 35,216 7,332 7,332 2,016 8,078 ($9,405) ($46,955) (13%) (17%) 38#39Adjusted EBITDA reconciliation Figures in thousands Net Loss Stock-based Compensation Expense Payroll Tax Associated with Stock-based Compensation Expense Third-party Acquisition Related Costs Depreciation Amortization of Intangible Assets Interest Income Interest Expense Change in Fair Value of Financial Instrument Provisions for Income Taxes Restructuring Charges Other Income/Expense Adjusted EBITDA Year Ended December 31, 2021 ($76,677) 25,424 1,111 23,299 2,867 3,284 (130) 828 (34) 70 ($19,958) 2022 ($139,919) 42,332 654 35,216 3,344 8,078 (4,198) 2,828 495 7,332 227 ($43,611) Three Months Ended December 31, 2021 ($34,244) 7,742 144 12,400 716 1,882 (65) 703 (297) 88 ($10,931) 2022 ($32,980) 12,146 13 3,775 776 2,016 (2,068) 708 254 7,332 (601) ($8,629) 39#40Non-GAAP net loss reconciliation Figures in thousands Net Loss Stock-based Compensation Expense Payroll Tax Associated with Stock-based Compensation Expense Third-party Acquisition Related Costs Amortization of Intangible Assets Change in Fair Value of Financial Instruments Restructuring Charges Non-GAAP Net Loss Year Ended December 31, 2021 ($76,677) 25,424 1,111 23,299 3,284 ($23,559) 2022 ($139,919) 42,332 654 35,216 8,078 7,332 ($46,307) Three Months Ended December 31, 2021 ($34,244) 7,742 144 12,400 1,882 ($12,076) 2022 ($32,980) 12,146 13 3,775 2,016 7,332 ($7,698) 40