Klaviyo Inc. announced record-breaking results for the 2025 Black Friday Cyber Monday (BFCM) period, reporting over $3.8 billion in Klaviyo Attributed Value (KAV), an increase of 27% year-over-year. Nearly 20,000 customers achieved their best sales day ever during this period. The company delivered more than 22.7 billion messages, up 25% from the previous year, and observed an 11% year-over-year rise in consumer spending despite a 10% decrease in discount rates. Text message revenue grew by 25% year-over-year as send volume increased by 34%, and email and text contributed to 42% of total revenue, rising to 43% on peak days. Usage of AI-driven product recommendations increased by 45% year-over-year, resulting in a 71% surge in revenue from those messages. Klaviyo also highlighted the adoption of personalized website pages and AI-powered customer service as factors contributing to increased customer engagement and conversion.