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Omnivore vs Diigo: catalog facts
Omnivore	Diigo
Free Free and open source under the AGPL-3.0 licence.	Freemium Free to use, with premium features such as archived web pages.
Web, Self-hosted, Browser extension	Web, Browser extension
Highlights, notes and labels on saved articles Newsletters by email, PDFs and RSS feeds in one place	Highlights and sticky notes on web pages and PDFs Tags and a personal library for saved pages
Hosted service closed, so you must run your own server Maintained by the community after the company stepped back	Page archiving requires a premium plan Closed source hosted service
Self-hosted	Web application, Browser extension
Open source	Closed source
License: AGPL-3.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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