Cusdis is an open-source, privacy-first comment system designed as a lightweight alternative to Disqus, which you can easily embed in a static blog. In this article, I show the integration using partials and a dispatcher in Hugo, discuss moderation, and check the real overhead on requests and transfer added by the widget.

Cusdis is a great, lightweight comment system, but its isolation inside an iframe means the default look rarely fits a polished blog. Instead of modifying the library’s source code, I’ll show you how to use JavaScript and the srcdoc attribute to inject your own styles directly into the widget.

Complete guide to deploying Cusdis comment system with Docker and Caddy reverse proxy on any VPS. Includes CORS configuration for embedded widgets.