[KajMagnus]

Then you might find Talkyard interesting: https://blog-comments.talkyard.io — reminds of Disqus, in that it's threaded, best first (optionally). (I'm developing it.)

> showing some CORS error

In my case, I found it annoying when cookies gradually stopped working, and eventually I had to make the software use custom HTTP headers instead of cookies.

> Seems that mostly spammers comment

The more interesting the contents of the blog is, the more real humans will like it and post comments? (if they can find it)

But a "Our company posts something each day, even if nothing has happened" blog, or AI fluff, attracts only spammers?