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Open Knowledge Maps vs PubMed: catalog facts
Open Knowledge Maps	PubMed
Free Free to use; run by a non-profit funded by supporting members.	Free Free to use, run by a US government agency.
Web	Web
Visual overview of a research topic Very large index of open research outputs	Over 40 million biomedical citations in one place Advanced search, clinical queries and MeSH browsing
AI mapping is still in beta Maps are built from metadata, not full text	Mostly citations and abstracts; full text depends on PubMed Central or publishers Limited to biomedical and life-sciences subjects
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.