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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Dev Platform
Agents
Video
Coding
Image
Productivity
Writing
Marketing
HeyGen S | Perplexity S | Fathom S | Suno S | |
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| Tagline | AI avatar videos. Record once, speak any language. | AI search done right. Cited answers, not chat theater. | Meeting notes, free forever for individuals. | Prompt to full song with vocals, instruments, the works. |
| Category | Video | Research | Meetings | Audio |
| Pricing | Free + $24-$65/mo | Free + $20/mo Pro | Free for individuals + $15-$29/user/mo teams | Free + $10/mo + $30/mo |
| Best for | Course creators, multilingual marketers, anyone scaling video content. | Replacing Google for any question where you want a cited answer in seconds. | Solo operators, freelancers, small teams on a budget. | Jingles, intros, demos, sketches, personal use. |
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| Kai's verdict | S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code. | 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. | S-tier in its category. The first AI music tool I'd actually listen to. |
| Link | Open → | Open → | Open → | Open → |