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OpenRouter
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Rows
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Reflect
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Leonardo.ai
A
TaglineOne API, every model. Pay-as-you-go, no subscriptions.Spreadsheets with AI + live integrations baked in.AI-powered networked notes. Roam with a brain.Gamer + creator image gen with model fine-tuning built in.
CategoryDev PlatformDataProductivityImage
PricingPay per token — model-dependentFree + $19-$89/user/mo$10/moFree + $12-$60/mo
Best forDevelopers experimenting across models. Apps that want fallback logic.Ops teams, marketers, anyone building dashboards from multiple sources.Knowledge workers + thinkers who want AI in their second brain.Indie game devs, illustrators, anyone training custom style models.
Strengths
  • 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
  • AI auto-links related notes
  • Generates backlinks + summaries
  • Clean, minimal UX
  • Train your own models on your style/character
  • Great for game art + concept art
  • Generous free tier
Weaknesses
  • Slight markup over direct API
  • Some provider features not exposed
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Expensive for just notes
  • Smaller community than Obsidian
  • General output behind Midjourney
  • Can be overwhelming
Kai's verdictS-tier for model-shopping. I use this for every prototype before committing.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier. Niche but beloved. If you've outgrown Notion, try this.A-tier for creators training custom looks. B-tier for general use.
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