Tools · Comparison

Connected Papers vs Litmaps vs Perplexity AI

All three are research tools. Here is what separates them.

	Connected Papers	Litmaps	Perplexity AI
What it is	A unique, visual tool to help researchers and applied scientists find and explore papers relevant to their field of work.	Litmaps accelerates your entire literature review. Discover important papers faster and transform how you do research with dynamic visualizations.	AI-powered search engine providing accurate, sourced answers using LLMs and real-time web search.
Category	Research	Research	Research
Pricing	Paid	Paid · $10/mo	Freemium · $20/mo
How it bills	Not published	Flat monthly	Flat monthly
Free tier	No	No	Yes
Rating	Not yet rated	Not yet rated	4.6 from 5,400 reviews
Features	—	—	Real-time web search Cited sources Pro Search deep research File analysis Image search Code execution Collections API access
What works	Sits in Research, one of the better-covered categories here — easy to compare	Publishes its price openly — $10/mo Sits in Research, one of the better-covered categories here — easy to compare	Accurate with citations Real-time information Excellent for research Clean interface Generous free tier
What does not	No free tier — it has to be paid for before it can be tried Does not publish a price on its own site, so the cost is only clear after signing up 44 other tools in this catalogue claim to do the same job 12 tools in the same category have a free tier	No free tier — it has to be paid for before it can be tried 44 other tools in this catalogue claim to do the same job 12 tools in the same category have a free tier	Pro features behind paywall Sometimes shallow answers Limited creative tasks Fewer integrations

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