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The Lens vs Open Knowledge Maps: catalog facts
The Lens	Open Knowledge Maps
Freemium Free to search, with paid subscriptions offered for some features.	Free Free to use; run by a non-profit funded by supporting members.
Web	Web
Patents and scholarly works in one search Built-in charts and analysis of results	Visual overview of a research topic Very large index of open research outputs
Analysis of very large result sets can time out Some features require a subscription	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 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.