Open source alternatives to Codex

2 projects on starwire do the same job. Ranked by how much of what Codex does each one covers, read from its README and website. Ties go to the most active.

What Codex does

  1. Coding agent that edits a repocore
  2. Run tasks in parallel in cloud sandboxescore
  3. Run commands and tests
  4. Terminal CLI
  5. Open pull requests
  6. Code review
  7. IDE extension

Each dot in the table is one job, in this order. Square dots are core jobs and count double. Full means yes, half means partly. "See the evidence" under a project shows the line behind each one. Coverage is what a project documents, not how well it works or how hard it is to move to. How we score this

ProjectCoversStarsCommits, 12 weeksLast releaseClosed vs openedSetupLicense
ParadevOpen source app for running several coding agents in parallel on your own plans Same job, different way78%16k+208
1,814
 4 days ago25% Install like an app MIT
Covers 1 of 2 core jobs. Partly: Coding agent that edits a repo. Not shown: IDE extension.See the evidence
  • Coding agent that edits a repocorePartlyRun Claude Code, Codex, or another CLI agent
  • Run tasks in parallel in cloud sandboxescoreYesUse cloud workspaces without keeping your own computer connected.
  • Run commands and testsYesrun the relevant tests, and preview your app
  • Terminal CLIYesScript it from any shell: create workspaces, launch agents
  • Open pull requestsYesreview, commit, push, and open pull requests
  • Code reviewYesa pull request pane with checks, review threads, and merge
  • IDE extensionNot shownNeither the README nor the website mentions it.
anteSelf-contained Rust agent harness that works like Claude Code or Codex Replaces it72%2.0k+14
136
 2 days ago100% Uses the terminal Apache-2.0
Covers 1 of 2 core jobs. Partly: Run tasks in parallel in cloud sandboxes; IDE extension. Not shown: Open pull requests.See the evidence
  • Coding agent that edits a repocoreYesadd error handling to src/main.rs
  • Run tasks in parallel in cloud sandboxescorePartly**Background Jobs**
  • Run commands and testsYesIt runs the suite, fixes its own mistake
  • Terminal CLIYescoding agent that lives in your terminal
  • Open pull requestsNot shownNeither the README nor the website mentions it.
  • Code reviewYesreview this for security issues
  • IDE extensionPartlyeditor plugins and integrations, over stdio

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