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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
A
OpenRouter
S
Rows
A
Perplexity
S
TaglineAI-powered networked notes. Roam with a brain.One API, every model. Pay-as-you-go, no subscriptions.Spreadsheets with AI + live integrations baked in.AI search done right. Cited answers, not chat theater.
CategoryProductivityDev PlatformDataResearch
Pricing$10/moPay per token — model-dependentFree + $19-$89/user/moFree + $20/mo Pro
Best forKnowledge workers + thinkers who want AI in their second brain.Developers experimenting across models. Apps that want fallback logic.Ops teams, marketers, anyone building dashboards from multiple sources.Replacing Google for any question where you want a cited answer in seconds.
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
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Expensive for just notes
  • Smaller community than Obsidian
  • Slight markup over direct API
  • Some provider features not exposed
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Not a general chatbot
  • Answers can be shallow on complex topics
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.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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