Massive Sites is a private, internal tool used by our own team to build and publish the websites we operate. It is not offered to the public and has no external users.
With the account owner's consent, the tool uses the Google Site Verification API and the Google Search Console API only to verify ownership of our own domains, add them as Search Console properties and submit their sitemaps. It does not read Gmail, contacts, files or any other Google data.
Details are in our Privacy Policy.