Best AI tools for developers

Developer AI is two categories that are quickly merging: editor-integrated autocomplete (GitHub Copilot, Codeium, Tabnine) and AI-first IDEs that rebuild the editor around chat (Cursor, Windsurf). For multi-file refactors and ticket-grade tasks, the new generation of coding agents (Devin, Replit Agent, Cline, Aider) actually ships PRs.