Mastra is an open-source TypeScript framework for AI agents and agentic workflows. It gives JavaScript and TypeScript developers primitives for agents, tools, memory, RAG, workflows and evals, plus built-in observability and deployment, so AI features can live in the same stack as a web app.
Key features
- Agents with tools and memory
- Typed workflows with branching and suspend/resume
- RAG and evals
- Built-in observability and tracing
- Mastra Connect with 23 providers and about 900 tools (Oct 7, 2026)
- MCP support, including MCP Events (Oct 23, 2026)
Who it's for
Mastra is for TypeScript developers and product teams who want to build agents without switching to Python.
Common use cases
- Customer support agents
- Internal copilots connected to SaaS tools
- Multi-step AI workflows in Next.js apps
- MCP servers and clients
Pricing
Mastra's framework is free and open source; the platform offers paid enterprise plans. Check the official site for current plan details.
Why Mastra is trending
Agent Controller went GA on Oct 6, 2026, Mastra Connect launched on Oct 7, 2026 with 23 providers and about 900 tools, and MCP Events followed on Oct 23, 2026.
Sources: mastra.ai
How to get started with Mastra
- Visit the official Mastra website at https://mastra.ai and read the quickstart in the docs.
- Sign up or install it, depending on whether you use the hosted service or the open-source version.
- Try it on a small project first, then connect it to your existing stack and CI.
- Review the pricing page before scaling usage so costs stay predictable.
Is Mastra worth it?
Mastra is a well-established tool with an active team and frequent releases in October 2026. For teams that match the use cases above, it's worth evaluating against the alternatives listed here, and the freemium model makes it easy to try before committing.
Alternatives
- LangChain.js: JS port of LangChain
- Vercel AI SDK: TypeScript toolkit for AI apps
FAQ
What is Mastra?
Mastra is an open-source TypeScript framework for building AI agents and workflows, with memory, observability and deployment built in.
Is Mastra free?
Yes, the framework is open source and free; enterprise platform plans are paid.
What language is Mastra written in?
TypeScript.
Does Mastra support MCP?
Yes, Mastra supports the Model Context Protocol.