Disqus
Below is an example of an embedded Disqus forum. Please feel free to leave a comment.
If you need help using Google Sites, please post your questions in the Google Sites Help Forum. I do not answer general support queries here.
Sign up at https://disqus.com/profile/signup/intent/
After creating your Disqus account get the Universal Embed Code.
https://help.disqus.com/customer/en/portal/articles/472097-universal-embed-code
You have to remove the commenting from the sections highlighted
Here's the code from my site:
