Open source OpenAI Codex alternatives

All OpenAI Codex alternatives

1. A

   A

   Aider

   49.5KstarsLike

   Aider is an open source command-line tool for pair programming with large language models. It maps your repository so the model understands the codebase, edits multiple files in place and commits each change to git with a descriptive message, which makes edits easy to review or undo. It works with models from Anthropic, OpenAI, Google, DeepSeek or local ones, accepts voice input and can lint and test after edits.

   8 Aider alternatives

   Pros

   • Free and open source, and works with any model, including local ones
   • Commits each change to git for easy review and rollback
   • Repository map gives the model context across the codebase

   Cons

   • Terminal-only workflow is less approachable than IDE tools
   • Model API costs are on you unless you run local models
   • Results depend heavily on the model you choose

   Cost / License

   FreeOpen source

   Categories

   AI Coding Assistants

   Platforms

   WindowsMacLinux

   Features

   Autonomous coding agentChat with your codebaseGit integrationTerminal integration

   Visit websiteMore about Aider
2. 

   

   Cline

   70.2KstarsLike

   Cline is an open source AI coding agent that runs inside VS Code and compatible editors. It plans tasks, creates and edits files, runs terminal commands and can drive a browser to test web apps, asking for approval at each step unless you grant more autonomy. You bring your own API key for providers like Anthropic, OpenAI and Google or use local models, and MCP servers extend what it can do.

   9 Cline alternatives

   Pros

   • Open source agent that runs inside VS Code
   • Bring your own API key or use local models
   • Asks for approval at each step, keeping you in control

   Cons

   • API costs can climb quickly on long agent tasks
   • Step-by-step approvals can slow down routine work

   Cost / License

   FreemiumOpen source

   Categories

   AI Coding Assistants

   Platforms

   WindowsMacLinux

   Features

   Autonomous coding agentChat with your codebaseIntegrationsTerminal integration

   Visit websiteMore about Cline