Diigo review

Diigo treats a bookmark as the start of research rather than the end. Its extension lets you highlight text in multiple colors and attach sticky notes to specific parts of a page, and those marks reappear whenever you return to the original page. Notes can be private, public or shared with a group, and threaded discussions turn a page into a shared reading. Annotation works on PDFs too, and you can import Kindle highlights and notes. The Outliner structures links, references and your own notes into an organized research base. Premium plans archive pages with annotations intact, can store multiple versions of the same URL, and let you upload a page that is dynamic or behind a login. Search covers full text, highlights and sticky notes. Standard costs $40 a year and Professional $59 a year, while Business costs $10 per user a month with team annotation and an admin console. The free plan has ads and limited storage.

Who it is for

students and teams who annotate live web pages

Price

Free plan with ads; Standard $40 a year, Professional $59 a year, Business $10 per user a month.

Standard $40/year
Quoted from the vendor pricing page on November 13, 2026.

Key features

• Highlights in multiple colors and sticky notes that reappear on the original page
• Annotate web pages and PDFs as you browse
• Outliner to structure links, references and notes into a research base
• Archived web pages kept with annotations intact on premium plans
• Import Kindle highlights and notes

Strengths and weaknesses

• Strength: Full-text search covers highlights, sticky notes and page titles
• Strength: Can upload a page even if it is dynamic or behind password protection
• Strength: Groups and a Business plan with collaborative web and PDF annotation
• Weakness: Free plan shows ads
• Weakness: Unlimited highlights, cached pages and PDF storage require a premium plan
• Weakness: Interface and tools are older than newer bookmark apps

Key facts

• Free plan: Yes, with ads
• Paid plans: Standard $40, Professional $59 a year
• Team plan: Business, $10 per user a month
• Users: 9 million plus, according to Diigo

Where it ranks

Diigo is No. 5 in our Best Bookmark Managers verdict.