Aider is the open-source AI pair programmer that works in your terminal with your existing codebase. It edits files and commits to git automatically, supports 100+ LLMs, and consistently tops AI coding benchmarks — the choice of developers who want full control.
Strengths
Limitations
Software Developers
Pair program with LLMs in the terminal to build new projects or extend existing codebases.
IDE Users
Trigger aider from within their preferred editor by adding code comments requesting changes.
Yes, Aider is free to use.
Yes, Aider provides an API for developers.
Yes, Aider is open source.
Aider is available on Mac, Windows, Linux.
Aider integrates with Claude 3.7 Sonnet, DeepSeek R1, DeepSeek Chat V3, OpenAI o1, OpenAI o3-mini, GPT-4o, Git, Discord.
Aider is offered as both cloud and self-hosted (hybrid) deployment.
No graphical interface; runs purely in the terminal, which some find limiting Also, Steeper learning curve than IDE extensions like Cursor or Copilot
Aider is best suited for Software Developers, IDE Users.
Common uses for Aider include start a new project with ai pair programming, build on an existing codebase, request new features, test cases, or bug fixes by voice, automatically lint and test code changes.
Replit is the closest alternative to Aider, followed by Cursor and GitHub Copilot.
Aider and Replit are both used for developer tools -- specifically coding assistants. See the full side-by-side comparison for pricing and feature differences.
Aider's published pricing · verified Sep 15, 2026
Free
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