Compare AI tools

	Elicit S	Perplexity S	NotebookLM S	Copy.ai A
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.	AI GTM platform. Workflows for sales + marketing ops.
Category	research	research	research	marketing
Pricing	Free + $12-$42/mo	Free + $20/mo Pro	Free	Free + $49-$249/mo
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.	RevOps + marketing ops automating repetitive tasks.
Strengths	Searches 125M+ papers Extracts + synthesizes findings across papers Systematic review workflow	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Upload anything, ask questions, get cited answers Audio Overview turns docs into a 10-min podcast Great for studying	Workflow builder for GTM automations CRM enrichment + outbound sequences Scales better than ad-hoc prompts
Weaknesses	Academic-only Can hallucinate citations — verify everything	Not a general chatbot Answers can be shallow on complex topics	Google-only Can be slow on large corpora	Overlaps with general chatbots Workflow setup takes time
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.	A-tier for ops automation. B-tier for simple copy (use Claude).
Link	Open →	Open →	Open →	Open →