Alternatives to Diigo

A web annotation and bookmarking service with a browser extension for highlighting, tagging and saving pages. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as Diigo.

  • Hypothesis

    Highlights and annotates any web page or PDF, privately or in a group.

    FreeOpen sourceWebBrowser extension

    Hypothesis is open source under BSD-2-Clause and free, with private, group and public annotation layers, but it offers no tagged bookmark library or outliner.

  • Glasp

    A browser extension and mobile app for highlighting text on web pages and PDFs and collecting notes.

    FreeProprietaryAndroidiOSBrowser extension

    Glasp highlights web pages and PDFs for free, adds iOS and Android apps and an API, and is built around a social hosted service.

  • Liner

    Browser extension for highlighting, bookmarking and AI-summarizing webpages.

    FreemiumProprietaryBrowser extension

    Liner combines highlighting, bookmarking and AI summaries of pages, PDFs and videos, with AI features processed in the cloud and likely limited on the free tier.

  • Raindrop.io

    Bookmark manager with collections, tags, full-text search and previews.

    FreemiumProprietaryWindowsmacOSLinuxAndroidiOSWebBrowser extension

    Raindrop.io focuses on bookmarks with collections, tags and previews on every platform, but lacks web page highlighting and sticky notes, and full-text search is paid.

  • WebScrapBook

    Captures web pages into an organised, annotatable local archive.

    FreeOpen sourceBrowser extension

    WebScrapBook is open source under MIT and keeps annotated captures in a local archive instead of a hosted service, though full features need a companion backend server.

Also worth comparing

These listings name Diigo as their own alternative, so the relationship runs both ways.

  • Obsidian Web Clipper

    Official browser extension that saves web pages and highlights to an Obsidian vault as files.

    FreeProprietaryiOSBrowser extension

    Diigo is a freemium annotation and bookmarking service with highlights, sticky notes and tags kept in a hosted library, with archiving on a premium plan.

Similar software

Related functionality, not a direct replacement.