codex
Apache-2.0 · Commercial use OK
codex is a free, open-source alternative to GitHub Copilot. It can be used without subscription fees — and its source code is open for anyone to inspect, modify and self-host.
License
Apache-2.0
GitHub
Replaces
1 commercial tools
GitHub stars
⭐ 101.4k
Written in
Rust
Forks
15.2k
Last activity
today
Growth (7 days)
+1,887 ★
About
Lightweight coding agent that runs in your terminal Its license (Apache-2.0) is permissive: free to use, modify and redistribute — including inside commercial and proprietary products.
What switching gets you
- No subscription, no per-seat pricing — free forever, for individuals and companies alike.
- Your data stays with you: it can run locally or on your own servers, with no vendor lock-in.
- The source code is public — auditable, extensible and maintained in the open by its community.
An open-source alternative to
Other alternatives worth a look
open-design🎨 The open-source Claude Design alternative. 🖥️ Local-first desktop app. 🖼️ Your coding agent becomes the design engine: prototypes, landing pages, dashboards, slides, images & video — real files, HTML/PDF/PPTX/MP4 export. 🤖 Claude Code / Codex / Cursor / GemipiAI agent toolkit: unified LLM API, agent loop, TUI, coding agent CLIopeninterpreterA coding agent for open models like Kimi K3kilocodeKilo is the all-in-one agentic engineering platform. Build, ship, and iterate faster with the most popular open source coding agent.qwen-codeAn open-source AI coding agent that lives in your terminal.