Isso – Ich schrei sonst – is a lightweight commenting server written in Python and JavaScript. It aims to be a drop-in replacement for Disqus.
See isso-comments.de for a live demo, more details and documentation.

Install Isso from PyPi:
pip install isso
Then, follow the Quickstart guide.
If you're stuck, follow the Install guide, see Troubleshooting and browse the the full documentation.
[!NOTE]
The Docker image tagging scheme for stable releases was changed from:latestto:releaseas of March 2024 (#970, #1012)
A Docker image with
the latest stable release is provided at ghcr.io/isso-comments/isso:release,
while isso:latest is rebuilt on every push to the master branch. See
Using Docker.
The maintainers recommend pinning the image to a
release tag, e.g.
isso:0.13.0.
Refer to the docs for Installing from Source.
#isso via IRC on Libera.ChatMIT, see LICENSE.