Diigo vs Hypothesis (2026): which should you pick?

Pick Diigo if

• Fits if you highlight and leave notes on web pages and PDFs as you research
• Works for teachers, who can apply for a free account that manages student accounts

Look elsewhere if

• Tight if you're staying free, with ads and only 500 bookmarks and 100 highlights, ever
• Skip it if you need an Android app, as the Google Play link on Diigo's tools page led nowhere when checked
• Pricey if all you want is unlimited PDF storage or outliners, since that's Professional at $59 a year
• Pricey if a team needs a shared library and group annotation, which is Business at $10 a user a month
• Watch out: Kindle is the only integration listed, and the Business trial's length isn't stated

Pick Hypothesis if

• Fits if you read and mark up web pages alone or in a small private group
• Works for teachers who want students annotating readings inside the LMS

Look elsewhere if

• Skip it if you want paid prices on the page, as none are published for Bronze, Silver or Gold
• Tight if your school has more than 3,000 students, because the paid tiers cap seats at 1,000, 2,000 and 3,000 and larger needs a sales call
• Pricey if you need LMS integration or analytics, which are not on the free plan
• Not for you if you want a phone app, as only a browser extension and a bookmarklet are listed

Diigo

• The Free plan shows ads and stops at 500 bookmarks and 100 highlights over the lifetime of the account.
• Cached pages and image storage start at Standard; unlimited PDF storage and outliners need Professional at $59 a year.
• Team library storage, collaborative annotation and the admin console are limited to Business at $10 per user a month.
• The tools page links to an Android app, but its Google Play listing returned a not-found page when checked.

Hypothesis

• No prices are published for Bronze, Silver or Gold; the pricing page says per student per year and points to sales.
• The paid tiers cap user seats at 1,000, 2,000 and 3,000, with a sales contact for anything larger.
• LMS integration, partner workshops and analytics are not on the Free plan.

Diigo

Bookmarks, tags and a personal library

Saved pages go into a cloud library and are tagged for later retrieval. Each item can be set as private or public.

Highlights and sticky notes

Highlight text and add sticky notes directly on web pages and PDFs while browsing; the annotations are still on the page when you come back to it.

Outliner

Arrange links, references and your own notes into a structured outline for a piece of research. Unlimited outliners are part of the Professional plan.

Groups

A group builds a shared library for a class, team or company that members can add to, search and discuss through annotations on the page.

Archived web pages

Paid plans store cached copies of bookmarked pages with their annotations intact, so they stay readable if the original source goes offline.

Import, export and API

The tools page lists bookmark and Kindle highlight import, library and PDF export, saving by email, automatic publishing to a blog and the Diigo API.

Hypothesis

Annotate any page

Highlight and comment on online articles, websites, videos and PDFs, and turn annotations into threaded discussions.

LMS integration

Connects to Canvas, Blackboard, Moodle, D2L Brightspace and Sakai through LTI so readings can be set inside a course.

Private groups

Annotation can be shared inside private groups, which the pricing page lists on the free plan.

Tagging other users

Mention classmates or colleagues in an annotation to notify them and draw them back into the reading.

Analytics and auto-grading

Silver and Gold add an LMS reporting dashboard and automatic grading of student annotations.

Chrome extension and bookmarklet

The web annotator works through a Chrome extension or bookmarklet in any modern browser released within the last 12 months.

Diigo

• Free$0

  Ad-supported, with lifetime caps of 500 cloud bookmarks and 100 webpage and PDF highlights.

• Standard$40

  per year

  No ads, with unlimited bookmarks, highlights, image storage and cached pages, plus Kindle highlight import.

• Professional$59

  per year

  Everything in Standard, plus unlimited PDF storage and unlimited outliners.

• Business$10

  per user / month (billing basis not stated)

  Everything in Professional, plus an unlimited team library, collaborative web and PDF annotation in a team, and an admin console.

Hypothesis

• Free$0

  Core annotation and private groups, with self-service support.

• BronzeCustom

  Priced per student per year with no figure shown. LMS integration, up to 1,000 seats, partner workshops, email support.

• SilverCustom

  Priced per student per year with no figure shown. Up to 2,000 seats, advanced analytics, auto-grading, Hypothesis Academy.

• GoldCustom

  Priced per student per year with no figure shown. Up to 3,000 seats, unlimited training, dedicated CSM, premium support.

Diigo

• Education

  Free teacher and student accounts

  Teachers can apply for a free account with more capabilities than the normal free plan, including a Teacher Console for creating and managing student accounts. Schools can apply for an education domain.

Hypothesis

No public discounts listed.