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The Lens vs Publish or Perish: catalog facts
The Lens	Publish or Perish
Freemium Free to search, with paid subscriptions offered for some features.	Free Free desktop software from Anne-Wil Harzing.
Web	Windows, macOS
Patents and scholarly works in one search Built-in charts and analysis of results	Calculates a range of citation metrics, including the h-index Exports results to several file formats or the clipboard
Analysis of very large result sets can time out Some features require a subscription	Depends on third-party data sources for its citation data Desktop only, for Windows and macOS
Web application	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
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.