Directory / Mastra
Mastra
Verified
TypeScript agent framework with workflows and evaluation hooks.
Mastra is an open-source TypeScript framework for agents with workflows, tools, memory, and evaluation hooks. It targets application teams building the control plane in TypeScript.
- Model support
- Multi-model
- Deployment
- Self-hosted
- Open source
- Yes
- License
- Apache-2.0
- Pricing model
- Free
- Added / updated
- 19 Aug 2026 / 19 Aug 2026
Assessment
Mastra fits a TypeScript application that owns its agent control plane. The framework has no hosted agent service. In-framework evaluations need independent hold-out cases to serve as a gate.
Strengths
- TypeScript-native agents and workflows.
- Apache-2.0, model-agnostic.
- Docs include evaluation and observability hooks alongside chat.
Limitations
- Younger than LangGraph; fewer integrations and examples.
- Hosting and sandbox capacity remain adopter responsibilities.
- Framework evaluations need hold-out cases to support release decisions.