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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Perplexity S | Synthesia A | GitHub Copilot B | Fathom S | |
|---|---|---|---|---|
| Tagline | AI search done right. Cited answers, not chat theater. | Enterprise AI avatar video for training + comms. | Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration. | Meeting notes, free forever for individuals. |
| Category | Research | Video | Coding | Meetings |
| Pricing | Free + $20/mo Pro | $22-$89/mo + enterprise | Free (limited) + $10/mo Pro + $19/mo Business | Free for individuals + $15-$29/user/mo teams |
| Best for | Replacing Google for any question where you want a cited answer in seconds. | Enterprise L&D, corporate training, internal comms. | Teams with GitHub already. Devs who don't want to change IDEs. | Solo operators, freelancers, small teams on a budget. |
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| Kai's verdict | S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week. | A-tier. HeyGen wins for creators, Synthesia wins for enterprise. | B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't. | S-tier for solo + free. The best free option, hands down. |
| Link | Open → | Open → | Open → | Open → |