Tools · Comparison

Alethea vs Connected Papers vs NotebookLM

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

	Alethea	Connected Papers	NotebookLM
What it is	ALETHIA AI is a research and development studio building at the intersection of two of the most transformative technologies of our time: Generative AI and…	A unique, visual tool to help researchers and applied scientists find and explore papers relevant to their field of work.	Grounds a model entirely in documents you upload, and will read the result back as a two-host podcast.
Category	Research	Research	Research
Pricing	Paid	Paid	Freemium · Free · Pro via Google AI plans
How it bills	Not published	Not published	Free
Free tier	No	No	Yes
Rating	Not yet rated	Not yet rated	Not yet rated
Features	—	—	Answers grounded strictly in your sources Citations to the exact passage Audio Overview podcast generation Study guides and briefing documents Large upload allowance
What works	Sits in Research, one of the better-covered categories here — easy to compare	Sits in Research, one of the better-covered categories here — easy to compare	Does not wander outside your documents Citations make checking easy Audio Overviews are genuinely useful
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 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	Cannot reason beyond the sources given Upload limits on the free tier Audio hosts have a fixed style

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