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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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Perplexity S | Otter.ai B | HeyGen S | Devin A | |
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| Tagline | AI search done right. Cited answers, not chat theater. | Meeting transcription veteran. Cross-platform, team-friendly. | AI avatar videos. Record once, speak any language. | Cognition Labs' autonomous coding engineer. |
| Category | Research | Meetings | Video | Agents |
| Pricing | Free + $20/mo Pro | Free + $17-$30/user/mo | Free + $24-$65/mo | $500/mo |
| Best for | Replacing Google for any question where you want a cited answer in seconds. | Teams on Windows/PC. Anyone needing cross-platform coverage. | Course creators, multilingual marketers, anyone scaling video content. | Engineering teams offloading tickets. Ops/platform work. |
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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. | B-tier. Granola is better UX but Otter works everywhere. Pick based on your platform. | S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code. | A-tier for the right use case. Not for solo devs. If you manage engineers, try one license. |
| Link | Open → | Open → | Open → | Open → |