Aider vs GitHub Copilot
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.
GitHub Copilot
GitHub Copilot autocompletes code as you type and now includes an agent mode that plans and edits across multiple files. Deeply integrated with VS Code, JetBrains and GitHub itself. If you're comparing Copilot vs Windsurf, Copilot wins on ecosystem depth while Windsurf is the stronger free alternative. Cursor offers a similar agent experience with a dedicated AI editor.
Pick Aider if you want developers who want a free, open-source, terminal-based ai coding assistant. Pick GitHub Copilot if you want developers who want ai completions inside their existing editor with full github integration. Both have a free way to try them, so the fastest answer is to open each and run your real task.