Isso

Isso is a lightweight commenting server designed as an alternative to Disqus. It allows you to embed a commenting system on your website with ease, providing a seamless experience for both administrators and users. Features include Markdown support for flexible and rich text formatting, user control allowing users to edit or delete their own comments within a configurable time window, moderation queue for quality control ensuring comments are approved before being publicly visible, SQLite backend making it lightweight and easy to manage, Disqus and WordPress import for easy migration of existing comments, and configurable JS client with a single JavaScript file embed that supports major browsers.