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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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TaglineRun any open-source AI model with an API call.Vector + raster AI for designers. Actually controls the output.Meeting notes, free forever for individuals.AI-powered networked notes. Roam with a brain.
CategoryDev PlatformImageMeetingsProductivity
PricingPay per second of computeFree + $12-$48/moFree for individuals + $15-$29/user/mo teams$10/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Designers, brand teams, anyone needing vector output or tight style control.Solo operators, freelancers, small teams on a budget.Knowledge workers + thinkers who want AI in their second brain.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Exports SVG vectors — rare in AI image gen
  • Strong style control + consistency
  • Brand kit for consistent outputs
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • AI auto-links related notes
  • Generates backlinks + summaries
  • Clean, minimal UX
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Less hyped than Midjourney
  • Learning curve for non-designers
  • Bot-joining model
  • Team features gated
  • Expensive for just notes
  • Smaller community than Obsidian
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for designers. The only one that takes vectors seriously.S-tier for solo + free. The best free option, hands down.A-tier. Niche but beloved. If you've outgrown Notion, try this.
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