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Publish or Perish vs The Lens: catalog facts
Publish or Perish	The Lens
Free Free desktop software from Anne-Wil Harzing.	Freemium Free to search, with paid subscriptions offered for some features.
Windows, macOS	Web
Calculates a range of citation metrics, including the h-index Exports results to several file formats or the clipboard	Patents and scholarly works in one search Built-in charts and analysis of results
Depends on third-party data sources for its citation data Desktop only, for Windows and macOS	Analysis of very large result sets can time out Some features require a subscription
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 26, 2026

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