Disqus offers the best add-on tools for site owners to power discussions, increase engagement, and earn revenue.
GraphComment is the next generation comments system. No more disorganized discussions piled on several pages. With GraphComment, you can easily follow the relevant discussions. The BubbleRank sort the answers in order of relevance.
An embeddable comment widget for websites, blogs, ecommerce & static pages. Joint Comments distributes JOINT tokens (erc-20 based cryptocurrency) to publishers based on the value of traffic.
It is free to use up to 250k page views / month.
A commenting server similar to Disqus and IntenseDebate
Licensed under AGPL: https://github.com/phusion/juvia/blob/master/LICENSE.TXT.This app doesn't have any features at the moment.Discontinued
Per project's README: Juvia is currently unmaintained. See https://github.com/phusion/juvia
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...
LiveRe is an alternative to Disqus based in South Korea and used by LG, Samsung, Nike, Kia, Hyundai, ... Like Disqus you it allow social log-in. It allow comment with attachment such as image & video.This app doesn't have any features at the moment.