Klaviyo, Inc. Q3 2026 Earnings Recap

Klaviyo shares fell 2.6% after earnings, a roughly flat reaction. Revenue grew 25% to $387 million, while the call emphasized early adoption of Composer and other AI tools; the transcript excerpt does not identify a clear driver of investor disappointment.

Key Takeaways

• Q3 revenue was $387 million, up 25% year over year; the company said annualized run rate had passed $1.5 billion.
• Klaviyo reported more than 211,000 customers and over $100 billion in Klaviyo-attributed customer value over the last 12 months, up 25% from the same period a year earlier.
• In the three weeks after Composer’s latest release, daily active accounts more than doubled to over 10,000, weekly credit usage more than tripled to 18 million, and credits per active account rose 60%.
• More than 70,000 accounts were using Klaviyo’s MCP server, with usage doubling quarter over quarter; management said Composer usage was growing faster.
• The excerpt provides no margin, profitability, or forward-guidance figures, limiting assessment of the quarter beyond growth and product-adoption metrics.