The TS-native option we keep reaching for. Smaller surface than LangGraph, cleaner DX, mature enough for prod. First-class workflows, evals, and RAG support out of the box. The right call for any TypeScript team shipping agent-driven features.
Mastra is the TypeScript-native agent framework that doesn’t feel like a LangChain port. Workflows, evals, RAG, and integrations are first-class; the API surface is small enough to learn in an afternoon.
What’s in the box
Workflows give you a typed state machine. Evals are built in — no separate library to wire up. RAG patterns ship with sensible defaults (Postgres + pgvector, Pinecone, etc.). The agent loop is opinionated in ways that save time on the things 90% of teams want.
Where it falls short
Newer than LangGraph, smaller community. If your team is Python-first or needs LangChain’s broader integration catalog, this isn’t the right tool. For TypeScript shops, the trade is generally worth it.