Perusall is a social web annotation tool intended for use by students at schools and universities. It allows users to annotate the margins of a text in a virtual group setting that is similar to social mediaâÂÂwith upvoting, emojis, chat functionality, and notification. It also includes automatic AI grading.
Perusall began as a research project at Harvard University. It later became an educational product for students and teachers.
As of 2024, Perusall states more than 5 million students have used the tool at over 5,000 educational institutions in 112 countries."
Perusall integrates with learning management systems such as Moodle, Canvas and Blackboard to aid with collaborative annotation.
The tool supports annotation of a range of media including text, images, equations, videos, PDFs and snapshots of webpages.