toolAgent Frameworks1 min read
Mastra
The TypeScript answer to LangGraph and CrewAI. If you live in Next.js, this is the agent framework you want.
An open-source TypeScript framework for building production AI agents, deterministic workflows, and RAG pipelines — bundles directly into existing React, Next.js, or Node apps with no Python service to host.
Summary
Mastra ships agents, typed workflows, RAG, evals, and observability as one stack — built by the team behind Gatsby and routed through 40+ model providers via a single interface. Agents reason and pick tools dynamically; workflows give you a graph-based engine with branching, suspend/resume, and human-in-the-loop steps for the cases where you can't afford a model to improvise. Eval and tracing primitives ship in the same package, so you're not stitching together three SaaS dashboards before your first agent goes to production.
For Next.js teams the integration is the point: drop Mastra into an existing app, expose agents through route handlers, and stream UI with Vercel AI SDK and AI Elements. This is the bridge between "we want AI in our product" and "our React engineers can ship it next sprint" — no Python microservice, no separate runtime, no handoff to a different team.