>>ry8806+(OP)
I was so hopeful for Cactus.chat built on matrix, but like all products built on the matrix protocol, you have to follow their mantra of being unusable and undiscoverable. The main page for cactus chat even quit hosting the JS file and none of the maintainers think that's a problem lol.
Still a cool comments product and I still use it on my blog.
https://cactus.chat/