Disqus

  1. Sign up at https://disqus.com/profile/signup/intent/
  2. After creating your Disqus account get the Universal Embed Code.
  3. https://help.disqus.com/customer/en/portal/articles/472097-universal-embed-code
  4. You have to remove the commenting from the sections highlighted
  5. Here's the code from my site:
Disqus Code