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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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Reflect
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OpenRouter
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TaglineAI-powered networked notes. Roam with a brain.One API, every model. Pay-as-you-go, no subscriptions.Vercel's AI-powered UI generator. Prompt to shadcn component.Spreadsheets with AI + live integrations baked in.
CategoryProductivityDev PlatformDesignData
Pricing$10/moPay per token — model-dependentFree + $20/moFree + $19-$89/user/mo
Best forKnowledge workers + thinkers who want AI in their second brain.Developers experimenting across models. Apps that want fallback logic.Frontend devs, PMs prototyping UIs, anyone on Next.js.Ops teams, marketers, anyone building dashboards from multiple sources.
Strengths
  • AI auto-links related notes
  • Generates backlinks + summaries
  • Clean, minimal UX
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Ships working React + Tailwind code
  • Shadcn/ui native
  • One-click deploy to Vercel
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
Weaknesses
  • Expensive for just notes
  • Smaller community than Obsidian
  • Slight markup over direct API
  • Some provider features not exposed
  • Best for shadcn stack
  • Iterating can be fiddly
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
Kai's verdictA-tier. Niche but beloved. If you've outgrown Notion, try this.S-tier for model-shopping. I use this for every prototype before committing.S-tier. If you're on Vercel/shadcn, this is cheating.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.
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