Mastra
Mastra is a YC Winter 2025 (W25) company. Based in Remote. Team of 8.
About Mastra
Summary
Mastra builds an open-source TypeScript framework that lets product developers construct, deploy, and evaluate production AI agents and applications. It ships primitives for multi-step workflows, autonomous agents, retrieval-augmented generation, and output evaluation, replacing the need to wire these components together from scratch. The target user is a software developer who needs to ship agent-based features, including human-in-the-loop workflows and long-running agents, without building core infrastructure by hand.
Go-to-market
Mastra targets product developers directly through an open-source, self-serve distribution model, with a paid tier for deployment, observability, and support visible on the public pricing page.
From the Y Combinator listing
The Javascript framework for building AI agents, from the Gatsby devs
Mastra is the easiest way to build a production AI application, built by the team that brought you Gatsby. We provide a complete set of AI primitives: workflows for complex operations, agents for autonomous decisions, RAG for knowledge integration, and evals for quality & accuracy. Mastra is open-source, modular, and built in Typescript for product developers. You can deploy Mastra on any cloud, and it gives you a straightforward syntax to solve the hardest problems building with AI: human-in-the-loop workflows, agent memory and tool selection, and output quality.
Facts
- B2B / B2B -> Engineering, Product and Design
- Remote
- 8
- Active
- Early
Founders (3)
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