Best Open Source Alternatives to OpenAI Assistants API

2 open-source tools that can replace OpenAI Assistants API. Compare tech stacks, licenses and stars below.

MCPMIT

Ultra-lightweight, self-hosted personal AI agent framework in Python with WebUI, tools, memory, MCP, and multi-agent wor

47k·AI Agents·Open source

Alternative to

MCPNOASSERTION

Mastra is a TypeScript framework for building AI agents, workflows, and MCP servers.

27k·AI Agents·Open source

Alternative to