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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Windsurf
A
OpenRouter
S
Cline
A
Rows
A
TaglineCodeium's agentic IDE. Cascade agent + strong free tier.One API, every model. Pay-as-you-go, no subscriptions.Open-source VS Code agent. Reads + writes + runs.Spreadsheets with AI + live integrations baked in.
CategoryCodingDev PlatformCodingData
PricingFree + $15/mo ProPay per token — model-dependentFree (open source) + your API costsFree + $19-$89/user/mo
Best forDevelopers who want Cursor-like power for less money.Developers experimenting across models. Apps that want fallback logic.VS Code users who want agentic coding without changing IDEs.Ops teams, marketers, anyone building dashboards from multiple sources.
Strengths
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
Weaknesses
  • Smaller community
  • Model selection more limited
  • Slight markup over direct API
  • Some provider features not exposed
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
Kai's verdictA-tier. Close second to Cursor. If $5/mo matters, start here.S-tier for model-shopping. I use this for every prototype before committing.A-tier. Best free agentic option in VS Code. Use with Claude for best results.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.
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