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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Writesonic B | Perplexity S | Groq S | Elicit S | |
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| Tagline | SEO-first AI writer. Optimized for ranking content. | AI search done right. Cited answers, not chat theater. | The fastest AI inference in the world. Crazy low latency. | AI research assistant for academic literature. |
| Category | Marketing | Research | Dev Platform | Research |
| Pricing | Free + $15-$99/mo | Free + $20/mo Pro | Free tier + pay-as-you-go API | Free + $12-$42/mo |
| Best for | Content marketers churning out SEO articles. | Replacing Google for any question where you want a cited answer in seconds. | Developers who need sub-100ms LLM responses. | Grad students, researchers, anyone doing literature reviews. |
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| Kai's verdict | B-tier. Use Claude + manual SEO thinking. Writesonic is fast but generic. | S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week. | S-tier for speed. When latency is the product, start here. | S-tier for academic research. Nothing else comes close for systematic reviews. |
| Link | Open → | Open → | Open → | Open → |