HarnessesFramework

Mastra

TypeScript framework for agents, workflows, memory and evals, with a hosted platform.

Maker
Mastra
Kind
framework
Interface
SDK
Open source
Open source · Licence: Apache-2.0 except ee/ directories (enterprise licence) · GitHub
GitHub stars
28,865 (GitHub API, 2026-10-17)
Models
—
Pricing
Framework open source. Platform Starter $0/mo (100K obs events, 24 CPU hrs); Teams $250/mo; Enterprise custom; Gateway tokens at market rate +5.5%. (source: official page, checked 2026-10-16)
MCP support
Yes
Subagents
Yes
Headless / scripted mode
—
Sandboxing
Yes
Official site
https://mastra.ai
Sources
mastra.ai/pricing · api.github.com/repos/mastra-ai/mastra · mastra.ai/docs/connections/mcp · mastra.ai/docs/subagents · mastra.ai/docs/sandbox/overview (docs checked 2026-10-17)
Other frameworks
Claude Agent SDK, OpenAI Agents SDK, smolagents, LangGraph

Every value comes from the official site or docs, or from the GitHub API, on the date shown. A blank (—) means the value isn't stated or wasn't verified. It never means 'no'. Pricing is copied from official pages and changes often. No affiliate links.