A reliable, customizable and privacy-focused serverless comment system with no coding required. Top features:
DISQUS - Disqus is a global comment system that improves discussion on websites and connects conversations across the web.
Realtidbits - Powering the Realtime Social Layer for Entertainment, Local Media and High Traffic Blogs.
Commento - A fast, bloat-free comments system to foster discussion on your website
HashOver - HashOver is a PHP comment system intended as a replacement for services like Disqus.
Hyvor Talk - The Best Commenting Platform For Your Website
Facebook Comments - Facebook comments plugin lets people comment on content on the site using their Facebook account.