Klaviyo IPO Presentation Deck

GAAP to Non-GAAP reconciliation (cont'd) Non-GAAP Free Cash Flow (in thousands) Net Cash Used in Operating Activities Acquisition of Property and Equipment Capitalization of Software Development Costs Non-GAAP Free Cash Flow Revenue Net Cash Used in Operating Activities Margin Non-GAAP Free Cash Flow Margin Q1'21 (5,451) Q2'21 (176) Q3'21 (166) ($3,978) $10,478 ($17,140) ($12,098) ($19,421) ($7,721) ($17,324) (486) Q4'21 $58,271 $66,949 $75,876 (16.5%) 11.0% (6.8%) 15.7% (22.6%) (2,936) (1,577) (3,059) (4,004) (5,961) (4,427) (1,429) Q1'22 (159) Q2'22 (218) (13.5%) Q3'22 (723) (585) Q4'22 ($9,605) $7,376 ($19,203) ($15,316) ($23,643) ($14,405) ($22,336) $18,587 $13,921 (19.6%) (7.1%) (14.5%) $20,914 $15,552 (25.3%) (17.1%) (23.8%) (13.2%) (18.7%) Q1'23 $89,544 $99,322 $109,023 $119,168 $145,235 $156,088 (898) (1,306) (325) 14.4% 12.8% 10.0% 8.9% 2023 Ⓒ Klaviyo Q2'23 $41,474 (444) (1,530) $39,500 Confidential $164,586 25.2% 24.0% 60

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