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Open Knowledge Maps vs The Lens: catalog facts
Open Knowledge Maps	The Lens
Free Free to use; run by a non-profit funded by supporting members.	Freemium Free to search, with paid subscriptions offered for some features.
Web	Web
Visual overview of a research topic Very large index of open research outputs	Patents and scholarly works in one search Built-in charts and analysis of results
AI mapping is still in beta Maps are built from metadata, not full text	Analysis of very large result sets can time out Some features require a subscription
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 September 26, 2026

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