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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
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Hume AI
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TaglineCodeium's agentic IDE. Cascade agent + strong free tier.Spreadsheets with AI + live integrations baked in.Google's answer. Best integrated with Workspace + free for a lot.Voice AI that reads + expresses emotion.
CategoryCodingDataChatbotsVoice
PricingFree + $15/mo ProFree + $19-$89/user/moFree + $20/mo Advanced (bundled with 2TB Drive)Free tier + pay-as-you-go
Best forDevelopers who want Cursor-like power for less money.Ops teams, marketers, anyone building dashboards from multiple sources.Anyone already on Google, research tasks, summarizing long documents.Therapy apps, customer service, any voice agent where emotion matters.
Strengths
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • Detects + mirrors emotional tone
  • EVI (Empathic Voice Interface) feels different
  • Expressive voice output
Weaknesses
  • Smaller community
  • Model selection more limited
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Niche use case
  • Pricing ramps fast
Kai's verdictA-tier. Close second to Cursor. If $5/mo matters, start here.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.A-tier in its niche. The only one that actually gets emotion right.
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