Compare software

Glasp vs Web Highlights: catalog facts
Glasp	Web Highlights
Free The extension and mobile apps are free.	Free The extension is free to install and use without signing up.
Android, iOS, Browser extension	Browser extension
Highlights both web pages and PDFs Extensions for Chrome, Safari, Edge and Firefox	Highlights persist on web pages and PDFs after reload Notes and tags for organising research
Built around a social, hosted service AI features depend on the company's servers	Proprietary extension Notes live in the extension's own app rather than plain files
Downloadable app, Browser extension	Browser extension
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	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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