Open source alternatives to Codex App

By GitHub stars it is Orca, with 124,398 stars and a commit on 14 Nov. Choose Orca when you want Claude Code, Grok, Gemini and other agent CLIs side by side in one window, not only OpenAI's Codex. Next come T3 Code (59,583 stars) and Paseo (24,010 stars).

Yes. The code of all 7 is public under MIT or Apache 2.0, so you can use them with no licence fee. Running one yourself costs the server and your time to look after it, and some makers also sell a hosted plan.

Start from the job you use Codex App for. Choose T3 Code when you want one desktop app for Codex, Claude Code, Cursor and other agents rather than an app for one provider. Choose Orchestrator.inc when you want workers from several agent makers, each in its own worktree, with pull requests tracked to merge.

6 of the 7: Orca, T3 Code, Paseo, Orchestrator.inc, Jean and Dray. Each tool's page says what it needs to run.

All 7 we track had a commit in the last 30 days, among them Orca, T3 Code, Paseo and Paradev. A recent commit shows the project is kept up, not that it will stay that way.

Apache 2.0 (4), MIT (3). MIT, BSD and Apache let you change and reuse the code freely.

The hosting. Codex App's maker runs the servers for you; with an open source tool the updates, backups, security fixes and support are yours, unless you take the maker's hosted plan. Features differ too, so check what each one imports and exports before you move your data.