Aider vs Devin AI
Both are AI code tools. Here’s how they compare on pricing, use case and popularity — so you can pick the right one without opening ten tabs.
Aider
Aider is a free, open-source command-line AI coding tool that connects to your git repo and edits files directly. It works with any AI model (GPT-4o, Claude, etc.) and has strong multi-file editing, test-running and commit support. Popular with developers who prefer terminal workflows.
Devin AI
Devin by Cognition is an autonomous AI software engineer that can plan, code, debug and deploy complete tasks. It operates with its own shell, editor and browser to carry out multi-step engineering work independently.
Pick Aider if you want developers who want a free, open-source, terminal-based ai coding assistant. Pick Devin AI if you want delegating complete software engineering tasks to an ai agent. Both have a free way to try them, so the fastest answer is to open each and run your real task.