Compare AI tools
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 | Replicate S | v0 S | Rows A | |
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| Tagline | AI-powered networked notes. Roam with a brain. | Run any open-source AI model with an API call. | Vercel's AI-powered UI generator. Prompt to shadcn component. | Spreadsheets with AI + live integrations baked in. |
| Category | Productivity | Dev Platform | Design | Data |
| Pricing | $10/mo | Pay per second of compute | Free + $20/mo | Free + $19-$89/user/mo |
| Best for | Knowledge workers + thinkers who want AI in their second brain. | Developers using open-source models (Flux, SDXL, Whisper, etc). | Frontend devs, PMs prototyping UIs, anyone on Next.js. | Ops teams, marketers, anyone building dashboards from multiple sources. |
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| Kai's verdict | A-tier. Niche but beloved. If you've outgrown Notion, try this. | S-tier for open-source model APIs. The default in this space. | S-tier. If you're on Vercel/shadcn, this is cheating. | A-tier. The most interesting spreadsheet in years. Great for ops dashboards. |
| Link | Open → | Open → | Open → | Open → |