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Open Knowledge Maps vs BASE (Bielefeld Academic Search Engine): catalog facts
Open Knowledge Maps	BASE (Bielefeld Academic Search Engine)
Free Free to use; run by a non-profit funded by supporting members.	Free Free to search in the browser.
Web	Web
Visual overview of a research topic Very large index of open research outputs	Focused on open-access academic content Draws on thousands of institutional repositories
AI mapping is still in beta Maps are built from metadata, not full text	Anti-scraper check requires modern JavaScript and can slow page loads Covers repository content, so some paywalled literature will be missing
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked October 2, 2026

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