Mastra — TypeScript AI Agent Framework

Core Features

Agents with Tools

const agent = new Agent({
  name: "Research Assistant",
  instructions: "You help users research topics.",
  model: openai("gpt-4o"),
  tools: { search: searchTool, summarize: summarizeTool },
});

Workflows

Multi-step, branching workflows with automatic state management:

const workflow = new Workflow({ name: "content-pipeline" })
  .step("research", researchStep)
  .step("write", writeStep, { after: "research" })
  .step("review", reviewStep, { after: "write" });

RAG

Built-in vector storage and retrieval with chunking strategies.

Memory

Persistent conversation memory across sessions with thread management.

50+ Integrations

Pre-built connectors for GitHub, Slack, Notion, Google, Stripe, and more.

Evals

Test agent quality with built-in evaluation framework.

FAQ

Q: What is Mastra? A: A TypeScript AI agent framework from the Gatsby team. Build agents with tools, workflows, RAG, memory, evals, and 50+ integrations. 22K+ GitHub stars, MIT licensed.

Q: How is Mastra different from LangChain.js? A: Mastra is TypeScript-native with first-class type safety, built-in workflow engine, persistent memory, and a scaffold CLI. More opinionated and production-oriented.