Alternatives to Disqus

https://cusdis.com/

https://commento.io/

https://posativ.org/isso/

https://commentbox.io/

https://www.barkdull.org/software/hashover

I'd go for https://www.discourse.org/ if you are hosting a long-term project where SEO & UI matters.

If it's a dev blog, then go https://utteranc.es/ or https://giscus.app/

I use Giscus :)

I've been collecting all the commenting tools in my blog post: https://darekkay.com/blog/static-site-comments/

https://fastcomments.com/

https://commento.io/

https://www.chatwoot.com/

https://github.com/chatwoot/chatwoot

A blog post comparing several solutions:

https://satchel.com/live-chat/