Cost / License
- Free
- Open Source (MIT)
Platforms
- Self-Hosted



Sites and apps similar to HTML Comment Box include Discourse, which is open source and free for personal use. Other options are Disqus, Zoomment, Isso and EchoThread. Comment Platforms like HTML Comment Box are a crowded field, with more than 25 alternatives for self-hosting and Linux.



Feature-rich and lightning fast forums. Works standalone or as a Rails engine. Markdown by default, with plugins for code highlighting, KaTeX math, and BBCode. No JavaScript required. Easy deployment on Heroku or with Ansible.



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...

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...
Real-time audience engagement platform - moderated live Q&A, live blogs, polls and match centers embedded on your own website.




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





Livefyre was an embeddable real-time commenting platform that turned comments on any site into live conversations, increased the quality of those conversations, and drove traffic to content around the web.

Comments Box is a social plugin that enables user commenting on your site. Features include moderation tools and distribution.

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.