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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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Dev Platform
Agents
Voice
Video
Audio
Research
Coding
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Image
Meetings
Design
Productivity
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Data
Marketing
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Windsurf
A
Cline
A
Rows
A
Grammarly
A
TaglineCodeium's agentic IDE. Cascade agent + strong free tier.Open-source VS Code agent. Reads + writes + runs.Spreadsheets with AI + live integrations baked in.Grammar check + tone + AI drafting, everywhere you type.
CategoryCodingCodingDataWriting
PricingFree + $15/mo ProFree (open source) + your API costsFree + $19-$89/user/moFree + $12-$15/mo Premium + team plans
Best forDevelopers who want Cursor-like power for less money.VS Code users who want agentic coding without changing IDEs.Ops teams, marketers, anyone building dashboards from multiple sources.Non-native English writers, business email, anyone who types a lot.
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
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
Weaknesses
  • Smaller community
  • Model selection more limited
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
Kai's verdictA-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.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.
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