Re:Ten years of professional blogging – what I’ve learned
by KajMagnus on Tuesday December 19, 2017 @03:20AM
(#15958611)
Or this: https://www.kajmagnus.blog/new-embedded-comments/ (open source like Isso and Schnack, or hosted for those who don't want to install anything)
https://github.com/posativ/isso
or this:
https://blog.webkid.io/moving-from-disqus-to-schnack/
You could also install Discourse on a subdomain (quick docker-based install on a $5/month server) and use that for comments.