Review of Mastra
Mastra is an open-source framework written in TypeScript to build advanced AI agents, multi-agent workflows and conversational apps. Built by the team behind Gatsby, it ships a full stack: tools, memory, evals, observability and deployment. Available self-hosted under Apache-2.0 or via a cloud platform with Enterprise controls (RBAC, SSO, VPC), it is one of the most modern agent frameworks available.
Mastra: Construisez des agents IA TypeScript modernes, avec mémoire, outils et déploiement Enterprise.
Best for
- TypeScript teams building AI agents
- Startups wanting an open-source framework
- Projects needing memory and evals
- Enterprises with RBAC or VPC needs
Not ideal for
- Non-developers wanting visual builders
- Teams writing only Python
- Very simple single-prompt use cases
- Projects with zero hosting budget
Pros & cons
- ✅ Modern TypeScript framework ideal for JS teams
- ✅ Complete stack: tools, memory, evals, observability
- ✅ Fully open-source Apache-2.0 license
- ✅ Cloud platform with RBAC, SSO and VPC hosting
- ✅ Active community backed by Y Combinator and $36M raised
- ⚠️ Developer-only scope, not for non-coders
- ⚠️ Documentation still evolving quickly
- ⚠️ Cloud platform paid above basic usage
- ⚠️ No built-in visual no-code editor
Our verdict
Mastra is one of the most mature AI agent frameworks available today. Its promise — a complete TypeScript stack to build agents with memory, observability and evals — is delivered with a high engineering bar. For JS/TS teams wanting to build a solid, maintainable AI product, it is probably the best open-source option right now. The companion cloud platform brings Enterprise features (RBAC, SSO, VPC hosting) that make it a credible alternative to proprietary stacks. Mastra is not aimed at non-technical users: code, architecture and evaluation skills are required. But for TypeScript-savvy teams, it is a powerful accelerator. The $36M raise and active community further guarantee a strong trajectory in the coming quarters.
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FAQ
Is Mastra really open source?
Yes, the bulk of the framework is published under Apache-2.0 on GitHub and can be self-hosted freely.
Do I need to code to use Mastra?
Yes, Mastra targets TypeScript developers. There is no built-in visual no-code editor.
What does the cloud platform offer?
Hosting, observability, access controls (RBAC, SSO), audit logs and VPC-based hosting.
Does Mastra support multiple LLMs?
Yes, it integrates with OpenAI, Anthropic, Google and most major LLM providers.
Who is behind Mastra?
Mastra is built by the team behind Gatsby and backed by Y Combinator with $36M raised.