Compare AI tools

	Perplexity S	Gemini A	NotebookLM S	Ollama S
Tagline	AI search done right. Cited answers, not chat theater.	Google's answer. Best integrated with Workspace + free for a lot.	Google's research notebook. Turns your docs into a podcast.	Run LLMs locally. One-line install, GUI optional.
Category	Research	Chatbots	Research	Dev Platform
Pricing	Free + $20/mo Pro	Free + $20/mo Advanced (bundled with 2TB Drive)	Free	Free + open source
Best for	Replacing Google for any question where you want a cited answer in seconds.	Anyone already on Google, research tasks, summarizing long documents.	Students, researchers, anyone with a stack of PDFs or a topic to learn.	Devs wanting offline/local LLMs for privacy or experimentation.
Strengths	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Native Google Workspace integration Very long context (1M+) Deep Research feature Free tier is generous	Upload anything, ask questions, get cited answers Audio Overview turns docs into a 10-min podcast Great for studying	Run Llama, Mistral, Qwen, etc. on your laptop Simple CLI + API Hardware-aware (picks the right quant)
Weaknesses	Not a general chatbot Answers can be shallow on complex topics	Writing quality trails Claude Over-refusals on edge content UI is cluttered	Google-only Can be slow on large corpora	Needs beefy laptop for larger models Speed way behind cloud APIs
Kai's verdict	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.	S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.	S-tier for local inference. If you care about privacy or want to tinker, install this today.
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