IntenseDebate vs. Isso
Take a look at this side-by-side comparison of IntenseDebate and Isso.
At a Glance
IntenseDebate
About IntenseDebate
IntenseDebate is a blog commenting system that supports Typepad, Blogger and Wordpress blogs. The system allows blog owners to track and moderate comments from one place with features like threading, comment analytics, user reputation, and comment aggregation.
Isso
About Isso
Isso is a lightweight commenting server written in Python and JavaScript, referred to as "Ich schrei sonst" in German.