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PubMed vs Open Knowledge Maps: catalog facts
PubMed	Open Knowledge Maps
Free Free to use, run by a US government agency.	Free Free to use; run by a non-profit funded by supporting members.
Web	Web
Over 40 million biomedical citations in one place Advanced search, clinical queries and MeSH browsing	Visual overview of a research topic Very large index of open research outputs
Mostly citations and abstracts; full text depends on PubMed Central or publishers Limited to biomedical and life-sciences subjects	AI mapping is still in beta Maps are built from metadata, not full text
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 October 1, 2026	Official website Full listing and sources Checked September 26, 2026

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