Add-ons are free and available in Third-Party Add-ons section in the official EPiServer Add-on Store. Starting from version 1.2.0, packages can also be installed in Visual Studio.
Disqus for EPiServer allows adding comments on pages as content properties, blocks or by displaying in the specified rendering areas. MVC and WebForms sites are supported. Available localization: English and Swedish.
Please see documentation below for more information about add-ons installation, discussion settings and how Disqus comments can be added on pages.