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Diigo vs Glasp: catalog facts
Diigo	Glasp
Freemium Free to use, with premium features such as archived web pages.	Free The extension and mobile apps are free.
Web, Browser extension	Android, iOS, Browser extension
Highlights and sticky notes on web pages and PDFs Tags and a personal library for saved pages	Highlights both web pages and PDFs Extensions for Chrome, Safari, Edge and Firefox
Page archiving requires a premium plan Closed source hosted service	Built around a social, hosted service AI features depend on the company's servers
Web application, Browser extension	Downloadable app, Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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