This privacy policy covers use of Hypothesis on the open web. For use of Hypothesis in a learning management system (LMS), see our companion privacy policy.

This privacy policy informs you of our policies regarding the collection, use, and disclosure of personal information of users of our website and/or services. We pride ourselves in ensuring that we collect, use, process and erase any personal information in accordance with current applicable laws in the United States of America (USA) and the General Data Privacy Regulation (GDPR). We’ve written a short blog post about our GDPR compliance.

If you have requests or questions concerning your personal information, please contact us at

Hypothesis offers annotation services, which you can use by signing up for an account where you will be asked to acknowledge and agree to our privacy policy. Some parts of those services are also available for anyone to view without an account, such as public annotations. We also publish an organizational website which in turn includes our annotation services so people can annotate our website.

We do not ask visitors to opt in just to access our organizational website because we have taken specific steps not to collect any personal information on the website using cookies or other means. The only cookies we use are de-identified, helping us understand how the website is used in general and to make it faster and easier to use. The website does enable you to opt in separately to do things like file support requests, receive emails, and/or follow our social media accounts, each of which may collect personal information from you to fulfill your request and are outlined below. Because our annotation se