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Open-Source Alternatives

Free Alternative to OpenAI Assistants API

2 free & open-source projects that replace OpenAI Assistants API.

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vs OpenAI Assistants APIskillsskillsfastmcpfastmcp
Stars33k28k
Forks2.8k2.4k
Contributors3030
Last CommitSep 8, 2026Jul 20, 2026
LicenseMITApache-2.0
LanguageTypeScriptPython

Tired of proprietary APIs for your AI agent skills?

Discover skills, the open agent skills tool that offers a powerful, flexible, and completely free alternative to commercial AI development platforms like OpenAI Assistants API. Build sophisticated AI agents by defining and integrating custom functions with ease.

  • ๐Ÿ› ๏ธ Define AI agent tools
  • ๐Ÿ”Œ Integrate custom functions
  • ๐Ÿš€ Develop agent workflows
  • ๐Ÿงช Test agent capabilities
  • ๐ŸŒ Share reusable skills

With skills, you get robust agent capabilities without any subscriptions or vendor lock-in. It's free forever, empowering your AI projects.

Elevate your AI agent development today. Explore skills on Fossy: https://fossy.dev/vercel-labs/skills

#OpenSourceAI#AIAgents#DeveloperTools#FreeSoftware#VercelLabs#TypeScript#AICommunity
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