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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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TaglineAI-powered networked notes. Roam with a brain.Spreadsheets with AI + live integrations baked in.Build a full app from a prompt. Stripe-ready.Terminal-based AI pair programmer. Git-aware, model-flexible.
Categoryproductivitydatadesigncoding
Pricing$10/moFree + $19-$89/user/moFree + $25-$100/moFree (open source) + whatever API you use
Best forKnowledge workers + thinkers who want AI in their second brain.Ops teams, marketers, anyone building dashboards from multiple sources.Non-devs + solopreneurs shipping MVPs.Developers who want open-source tooling with full control.
Strengths
  • AI auto-links related notes
  • Generates backlinks + summaries
  • Clean, minimal UX
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Generates full apps + DB + auth
  • Good for non-developers
  • Ships faster than hand-coding
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
Weaknesses
  • Expensive for just notes
  • Smaller community than Obsidian
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Complexity ceiling
  • Can generate brittle code
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
Kai's verdictA-tier. Niche but beloved. If you've outgrown Notion, try this.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier. The strongest 'no-code' AI builder right now. Great for founder MVPs.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.
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