# Mastra

Open-source TypeScript framework (Apache 2.0) for agents, workflows and RAG. Mastra is free, with no paid plan attached, at mastra.ai.

## Facts

- **Pricing tier:** Free
- **Works on:** API, Self-hosted, CLI
- **Works in browser:** No

## Capabilities

- Open-source TypeScript framework (Apache 2.0) for agents, workflows and RAG
- Drops directly into existing React/Next.js apps or runs standalone
- Built-in workflow engine with suspend/resume and human-in-the-loop steps

## FAQ

### What is Mastra?

Mastra is listed under Agent Frameworks (Developers), in the AI Agents & Automation category on Flocci AI Tools. Open-source TypeScript framework (Apache 2.0) for agents, workflows and RAG. It is free, with no paid plan attached, and it lives at mastra.ai.

### Is Mastra free?

Mastra is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 396 entries on Flocci AI Tools with no upgrade path built in.

### Can I use Mastra in a browser, or is there an app?

Mastra needs to be installed or self-hosted — it doesn't run in a browser tab. It is available on an API, self-hosting and the command line.

### What can Mastra do?

Mastra does 3 things the catalog singles out: Open-source typescript framework (apache 2.0) for agents, workflows and rag; drops directly into existing react/next.js apps or runs standalone; built-in workflow engine with suspend/resume and human-in-the-loop steps.

### What is the best free alternative to Mastra?

Agno is the closest free alternative: it sits in the same Agent Frameworks (Developers) sub-category and is free. AWS Strands Agents, CAMEL and Claude Agent SDK also start free. The full list is on the alternatives page.

## Related

- [Mastra alternatives](https://aitools.flocci.in/alternatives/mastra)
- [Agent Frameworks (Developers)](https://aitools.flocci.in/category/ai-agents-automation/agent-frameworks-developers)
- [Best free AI agent frameworks for developers](https://aitools.flocci.in/best/best-agent-frameworks-developers)
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Source: Flocci AI Tools — https://aitools.flocci.in/tool/mastra

Facts last verified: October 2026