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