Mastra

Founded by Shane Thomas in 2024

A TypeScript framework + cloud for building, observing, and orchestrating AI agents & workflows with unified APIs and dev-friendly tools.

Cost

Free Tier, Paid

Rating

★ People love it

Time to value

Quick Setup (< 1 hour to try simple agents; more time to configure production workflows and observability)

You can use Mastra when you want to build AI agents in a modern JavaScript/TypeScript stack—whether for prototyping or production. It offers agents that maintain memory, workflows (durable graph-based state machines), observability for agent behaviour, vector/RAG tools, and unified provider APIs that let you switch LLMs easily. Great for dev teams building multi-agent apps, copilots, RAG pipelines, or any system needing orchestration, tracing, and modular agents.

What Mastra does

Create agents in TypeScript/Node with memory and tool-callingDefine and run workflows that chain LLM/tool/agent steps with branching/retriesEmbed RAG capabilities (vector store, embeddings, query, rerank) in agentsSwitch LLM providers via a unified API/interfaceObserve/tracing agent executions (tool calls, memory usage, performance, errors)Evaluate agent output (using cloneable scorers, structured output APIs, etc.)TypeScript-first agent & workflow framework with unified APIsDurable workflows: graph-based state machines with pauses, retries, human-in-the-loop supportBuilt-in observability: tracing, evaluation, performance / cost metrics step-by-stepSeamless RAG support: vector store + embeddings + metadata filtering + rerankingUnified provider abstraction (swap LLMs easily)Developer-friendly UX: CLI, templates, structured outputs, observability dashboards