Tools · Comparison

Connected Papers vs Litmaps vs OpenSEO

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

	Connected Papers	Litmaps	OpenSEO
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.	OpenSEO is the open source alternative to Ahrefs and Semrush. Keyword research, backlinks, rank tracking, and site audits, billed by usage instead of a $100-plus monthly subscription. Self-host it free, or connect it to your AI agents over MCP.
Category	Research	Research	Research
Pricing	Paid	Paid · $10/mo	Freemium
How it bills	Not published	Flat monthly	Not published
Free tier	No	No	Yes
Rating	Not yet rated	Not yet rated	Not yet rated
Features	—	—	—
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	—
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	—