No. Your site will not be negatively impacted if you use Fathom Analytics instead of Google Analytics. You can read our in-depth article on this subject here: Does removing Google Analytics hurt your search engine/SEO ranking? Since our embed script is MUCH smaller (and loads via our global CDN), your site will load faster using Fathom. This is good for your SEO. Note: if you see errors in a page speed tester, that’s due to our script blocking non-human visits (like the crawlers used to check websites in some page speed testers).