Instacomment is described as 'A free comment service allowing website owners to instantly add a comment system to any website or blog'. There are more than 10 alternatives to Instacomment, not only websites but also apps for a variety of platforms, including Self-Hosted solutions, Wordpress, SaaS and Blogger. The best alternative is Disqus, which is free. Other great sites and apps similar to Instacomment are Hyvor Talk (Paid), Joint Comments (Free), IntenseDebate (Free) and Metype (Freemium).
Docuss is a comment/discussion/collaboration system for your website or web app, based on Discourse. Features: - Add comments or full discussion topics to your web pages - Create menus or buttons with attached comments/discussions - Host it yourself or have it hosted for you