Diigo

A web annotation and bookmarking service with a browser extension for highlighting, tagging and saving pages.

FreemiumProprietaryWebBrowser extension
Official websitediigo.com

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About Diigo

Diigo lets you bookmark and tag web pages, highlight text, and add sticky notes directly on pages and PDFs as you browse. Saved items go into a personal online library, and an Outliner helps structure links, references and notes into a research base.

Groups allow research to be shared with classmates, colleagues or friends. A premium tier adds archived copies of web pages that keep your annotations even if the original page disappears. It suits students and researchers who collect and annotate a lot of online material.

Strengths

  • Highlights and sticky notes on web pages and PDFs
  • Tags and a personal library for saved pages
  • Outliner for structuring research
  • Groups for sharing collections

Limitations

  • Page archiving requires a premium plan
  • Closed source hosted service

Details

Pricing
FreemiumFree to use, with premium features such as archived web pages.
License
Proprietary
Developer
Diigo
Platforms
Web, Browser extension
How it runs
Web application, Browser extension
Best suited for
Students and researchers who annotate and organise online sources
Last verified
Added
Provenance
Facts checked against the developer's own pages and store listings, 1 sources on file.

Alternatives to Diigo

Compare all

Software that can replace Diigo for an important use case, and what changes if you switch.

  • 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.

Diigo as an alternative

Listings that name Diigo as an alternative.

  • 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 necessarily a direct replacement.

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