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

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