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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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Perplexity
S
Rows
A
NotebookLM
S
OpenRouter
S
TaglineAI search done right. Cited answers, not chat theater.Spreadsheets with AI + live integrations baked in.Google's research notebook. Turns your docs into a podcast.One API, every model. Pay-as-you-go, no subscriptions.
CategoryResearchDataResearchDev Platform
PricingFree + $20/mo ProFree + $19-$89/user/moFreePay per token — model-dependent
Best forReplacing Google for any question where you want a cited answer in seconds.Ops teams, marketers, anyone building dashboards from multiple sources.Students, researchers, anyone with a stack of PDFs or a topic to learn.Developers experimenting across models. Apps that want fallback logic.
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Upload anything, ask questions, get cited answers
  • Audio Overview turns docs into a 10-min podcast
  • Great for studying
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Google-only
  • Can be slow on large corpora
  • Slight markup over direct API
  • Some provider features not exposed
Kai's verdictS-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.S-tier for model-shopping. I use this for every prototype before committing.
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