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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Hex A | Perplexity S | Fathom S | Gemini A | |
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| Tagline | Modern data notebook with Magic AI assistant. | AI search done right. Cited answers, not chat theater. | Meeting notes, free forever for individuals. | Google's answer. Best integrated with Workspace + free for a lot. |
| Category | Data | Research | Meetings | Chatbots |
| Pricing | Free + $28+/user/mo | Free + $20/mo Pro | Free for individuals + $15-$29/user/mo teams | Free + $20/mo Advanced (bundled with 2TB Drive) |
| Best for | Data teams at startups + enterprises. | Replacing Google for any question where you want a cited answer in seconds. | Solo operators, freelancers, small teams on a budget. | Anyone already on Google, research tasks, summarizing long documents. |
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| Kai's verdict | A-tier for data teams. S-tier if you already live in SQL + Python. | S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week. | S-tier for solo + free. The best free option, hands down. | A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google. |
| Link | Open → | Open → | Open → | Open → |