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Glasp vs Diigo: catalog facts
Glasp	Diigo
Free The extension and mobile apps are free.	Freemium Free to use, with premium features such as archived web pages.
Android, iOS, Browser extension	Web, Browser extension
Highlights both web pages and PDFs Extensions for Chrome, Safari, Edge and Firefox	Highlights and sticky notes on web pages and PDFs Tags and a personal library for saved pages
Built around a social, hosted service AI features depend on the company's servers	Page archiving requires a premium plan Closed source hosted service
Downloadable app, Browser extension	Web application, 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.