Compare AI tools

	Windsurf A	Cline A	OpenRouter S	GitHub Copilot B
Tagline	Codeium's agentic IDE. Cascade agent + strong free tier.	Open-source VS Code agent. Reads + writes + runs.	One API, every model. Pay-as-you-go, no subscriptions.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.
Category	coding	coding	dev platform	coding
Pricing	Free + $15/mo Pro	Free (open source) + your API costs	Pay per token — model-dependent	Free (limited) + $10/mo Pro + $19/mo Business
Best for	Developers who want Cursor-like power for less money.	VS Code users who want agentic coding without changing IDEs.	Developers experimenting across models. Apps that want fallback logic.	Teams with GitHub already. Devs who don't want to change IDEs.
Strengths	Cheaper than Cursor Cascade agent for multi-file tasks Solid free tier	Free extension for VS Code Plan + Act modes Model-agnostic (Claude, GPT, local) Sees terminal output and iterates	300+ models from one endpoint Automatic fallbacks between providers No subscription — just pay what you use	Great enterprise story Works in your existing IDE Chat + autocomplete
Weaknesses	Smaller community Model selection more limited	Can burn tokens fast if not watched Less polished than Cursor	Slight markup over direct API Some provider features not exposed	Less agentic than Cursor/Claude Code Model quality varies
Kai's verdict	A-tier. Close second to Cursor. If $5/mo matters, start here.	A-tier. Best free agentic option in VS Code. Use with Claude for best results.	S-tier for model-shopping. I use this for every prototype before committing.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.
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