Diigo
FREEMIUM
Social bookmarking with annotation and research tools.
About
Diigo is a bookmarking tool that allows users to save, tag, and annotate web pages. It supports highlighting, sticky notes, and group collaboration. Diigo is used for research, content curation, and knowledge sharing.
Pricing
Pricing Type
Freemium
Starting Price
$5
Billing
Billed monthly
Last checked: February 19, 2026