Netlify Green Hosting

Hi, does anyone happen to know why I’m getting two different sustainability ratings for my website depending on if I use the default Netlify domain, or the custom domain to check ?

The website’s default domain is the following:

And this is it’s green rating:

However when I use the custom domain

I get this grey rating:

Any insights would be much appreciated on this!

Thank you in advance.


I’m not sure how trustworthy this rating is in the first place, since it seems to think Netlify sites are hosted by Google Inc.

A more elaborate check (although it makes use of the exact same service plus lighthouse) can be found here: