Open-Source Code & Development AI Tools (2026) 10 apps

The best open-source code & development AI tools on HyperStore — compare features, pricing and ratings.

10 free 8 with API 10 open source

These are the best open-source Code & Development AI tools in 2026. Every one of the 10 tools below is open-source, so you can self-host it, audit the code and avoid vendor lock-in.

Top picks include AI Horde, fast.ai and MarsX. Among them, 10 offer a free plan and 8 ship a developer API.

Every tool is independently curated by HyperStore. Compare features, pricing and ratings below to find the right fit for your Code & Development workflow.