HyperComments

Disqus is the web’s most popular discussion system. It's a global comment system that improves discussion on websites and connects conversations across the web.

Powering the Realtime Social Layer for Entertainment, Local Media and High Traffic Blogs

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...

Comments Box is a social plugin that enables user commenting on your site. Features include moderation tools and distribution. Social Relevance: Comments Box uses social signals to surface the highest...

Livefyre is an embeddable real-time commenting platform that turns comments on any site into live conversations, increases the quality of those conversations, and drives traffic to content around the web. …

talkatv is an open source comment service much like Disqus or IntenseDebate .

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

coComment is a service for managing, powering and researching conversations online. When using coComment, you can keep track of your comments across any site, share them with friends, and get …

Moot Inc. is a Helsinki/Oregon based company on a mission to re-imagine internet forums and commenting.

An engaging comment system that offers competitive features to increase traffic and engagement for a passionate user-base.

SolidOpinion is a reputation based comment system

Hosted comment system for blogs and CMS. Publishers can embed Echo on any site and turn their static pages into a real-time stream of diggs, tweets, facebook updates, comments and …