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.Pick tools (2 selected)
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writing
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Lex A | Perplexity S | |
|---|---|---|
| Tagline | Google Docs with an AI collaborator baked in. | AI search done right. Cited answers, not chat theater. |
| Category | writing | research |
| Pricing | Free + $12/mo | Free + $20/mo Pro |
| Best for | Essays, long-form drafts, thinking on the page. | Replacing Google for any question where you want a cited answer in seconds. |
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| Kai's verdict | A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form. | S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week. |
| Link | Open → | Open → |