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Aider vs Windsurf
A factual side-by-side comparison of Aider and Windsurf. We compare pricing, categories, free tiers and official websites — no invented scores.
Updated 2026-10-22
Quick take
Aider is Free; Windsurf is Freemium. If you want to start free, check the free or freemium option first; otherwise compare the categories and taglines below.
| Pricing | Free | Freemium |
|---|---|---|
| Categories | Coding | Coding |
| Best for | Open-source CLI pair programming | The agentic IDE from Codeium |
| Free tier | Yes — free or freemium | Yes — free or freemium |
| Website | aider.chat | windsurf.com |