Mastra develops a TypeScript-first agent framework aimed at making it easier for developers to build and deploy AI agents. Public accounts note the framework’s rapid adoption and describe it as the third-fastest-growing JavaScript framework ever measured. The framework is reported to be running in production at customers such as Replit, PayPal, Adobe, and Marsh McLennan. Financially, Mastra recently raised a $22M Series A led by Spark Capital following early backing from Scale Asia Ventures. The company is framed as part of the AI-native developer infrastructure layer and has emphasized developer-focused product and team experience as drivers of its growth.

Total raised

$22M

Funding rounds

1

Latest round

Series A

Latest activity

Apr 2026