Disqus (/dɪsˈkʌs/) is an American blog comment hosting service for websites and online communities that use a networked platform.

Users have the option to pay fees to remove ads and access extra features.

[16] Privacy issues have been noted as inherent in the use of services like Disqus, which serve their content through third-party JavaScript widgets.

Information tracked by Disqus, which may be disclosed to third parties, includes pseudonymous analytics data, such as a user's IP address, their web browser version and installed add-ons, and their referring pages and exit links.

[23] In September 2014, it announced an update to its privacy policy: "Disqus will be using anonymous interest data for content personalization and ad targeting.

On the Disqus site, the user can only load small batches of successively older comments by scrolling down.

[25] In 2013, a Swedish group called Researchgruppen obtained and exposed a large number of anonymous Disqus identities through the application programming interface (API).

[26] The group cooperated with the Bonnier tabloid, Expressen, who subsequently visited some of the commenters in their homes, confronting them with their allegedly racist, misogynic, and derogatory sentiments.

Researchgruppen said their database contained millions of comments from Disqus users around the world who are at risk of de-anonymization.

[30] On October 6, 2017, Disqus announced that a snapshot of its database from 2012, containing 17.5 million users' email addresses, login names and sign-up dates from between 2007–2012, had been exposed.

[38] Disqus also injects untrusted and potentially dangerous third party advertising code into containing webpages.