BigCommerce Results Presentation Deck

(as of 6/30/23) 3 ...and enterprise accounts outpacing non-enterprise accounts and partner and services revenue +44% YoY +46% $51M $55M Q1 +44% $61M Q2 Q3 2019 +44% +40% $67M $71M T Q4 Q1 +44% $80M Q2 Q3 Enterprise ARR ($M) +48% $101M $90M 2020 +54% +58% $123M +51% $112M 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 +78% $160M Q3 Q4 2021 +68% +68% $207M +72% $189M $173M Q1 +35% $216M +30% $224M Q2 Q3* Q4 2022 +21% $229M +14% $236M Q1 Q2 2023 31

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