Cactus Comments is a federated comment system for the web, based on the Matrix protocol. The system is easily embedded, respects you and your users privacy and is completely free and open source.


Remark.as is described as 'Have a real conversation again' and is a comment platform in the social & communications category. There are more than 25 alternatives to Remark.as, not only websites but also apps for a variety of platforms, including Self-Hosted, SaaS, Wordpress and Linux apps. The best Remark.as alternative is Disqus, which is free. Other great sites and apps similar to Remark.as are Zoomment, Isso, utterances and EchoThread.
Cactus Comments is a federated comment system for the web, based on the Matrix protocol. The system is easily embedded, respects you and your users privacy and is completely free and open source.


Remark42 is a self-hosted, lightweight, and simple (yet functional) comment engine, which doesn't spy on users. It can be embedded into blogs, articles or any other place where readers add comments.


HashOver is a PHP comment system intended as a replacement for services like Disqus. HashOver is free and open source software, under the GNU Affero General Public License. HashOver adds a "comment section" to any website, by placing a few simple lines of JavaScript or...

HTML Comment Box is an easy wasy for your website to receive, and optionally approve/delete comments from your visitors.
ommentics is a free, advanced PHP comment script with many features. Professionally written and with open source code, its main aims are to be integrable, customizable and secure. It is designed to be integrated into existing pages.



A commenting server similar to Disqus and IntenseDebate
Licensed under AGPL: https://github.com/phusion/juvia/blob/master/LICENSE.TXT.





IntenseDebate is the premier commenting system available on the Internet for blogs and websites. IntenseDebate comments enhances and encourages conversation on your blog or website. With IntenseDebate you can give your blog readers the opportunity to better engage your blogs...
Commentar is a self hosted open source commenting system which can easily be integrated into any existing system. It is a modular system and some features that will be implemented are:
Master Comments System is a very compact comments system with basic options:
Comments can be accepted from all users or only registered users. Admin can Edit/Delete/Ban. Users can Edit/Delete their last posted comment. Admin can view the IP/Browser of the user who posted the com.