A agentindex
Comparison

Mastra vs OpenAI Agents SDK

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

Mastra

The TypeScript-first agent framework.

  • + Best-in-class DX for TS/JS teams
  • + Includes evals and memory out of the box
  • − Elastic license limits some commercial hosting
  • − Smaller community than Python options

OpenAI Agents SDK

OpenAI's lightweight agents SDK (Swarm successor).

  • + Minimal and readable abstraction
  • + First-class OpenAI tracing and guardrails
  • − OpenAI models first
  • − Young ecosystem
Spec Mastra OpenAI Agents SDK
Category framework framework
License Elastic-2.0 MIT
Open source Yes Yes
Self-hostable Yes Yes
MCP support Yes Yes
Pricing free free
Starting price BYOK usage cost BYOK usage cost
Models claude, gpt, gemini, byok gpt
Languages typescript python
GitHub stars 25.4k 27.4k
Last activity 2026-06-25 2026-06-24