Compare AI tools
Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via
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Elicit S | Perplexity S | NotebookLM S | Claude Agent SDK S | |
|---|---|---|---|---|
| Tagline | AI research assistant for academic literature. | AI search done right. Cited answers, not chat theater. | Google's research notebook. Turns your docs into a podcast. | Anthropic's SDK for building your own agents on Claude. |
| Category | research | research | research | agents |
| Pricing | Free + $12-$42/mo | Free + $20/mo Pro | Free | API usage + SDK is free |
| Best for | Grad students, researchers, anyone doing literature reviews. | Replacing Google for any question where you want a cited answer in seconds. | Students, researchers, anyone with a stack of PDFs or a topic to learn. | Developers building custom agents for their own company/product. |
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| Kai's verdict | S-tier for academic research. Nothing else comes close for systematic reviews. | S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week. | S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs. | S-tier for builders. The right primitives. What Kai is built on under the hood. |
| Link | Open → | Open → | Open → | Open → |