Compare software

Web Highlights vs Glasp: catalog facts
Web Highlights	Glasp
Free The extension is free to install and use without signing up.	Free The extension and mobile apps are free.
Browser extension	Android, iOS, Browser extension
Highlights persist on web pages and PDFs after reload Notes and tags for organising research	Highlights both web pages and PDFs Extensions for Chrome, Safari, Edge and Firefox
Proprietary extension Notes live in the extension's own app rather than plain files	Built around a social, hosted service AI features depend on the company's servers
Browser extension	Downloadable app, Browser extension
Closed source	Closed source
License not stated	License not stated
No account 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 October 1, 2026	Official website Full listing and sources Checked September 24, 2026

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