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Web HighlightsOmnivore
Free

The extension is free to install and use without signing up.

 Free

Free and open source under the AGPL-3.0 licence.

Browser extension Web, Self-hosted, Browser extension
  • Highlights persist on web pages and PDFs after reload
  • Notes and tags for organising research
  • Highlights, notes and labels on saved articles
  • Newsletters by email, PDFs and RSS feeds in one place
  • Proprietary extension
  • Notes live in the extension's own app rather than plain files
  • Hosted service closed, so you must run your own server
  • Maintained by the community after the company stepped back
Browser extension Self-hosted
Closed source Open source
License not stated License: AGPL-3.0
No account needed Not stated if an account is needed
Not stated if it works offline Works offline

Checked October 1, 2026

Checked September 23, 2026

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