free tool
Free email provider checker
A shared provider gives inboxes to millions of unrelated people, so the domain says nothing about the company. Check whether an address is on one.
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faq
Free email provider checker: common questions
Is Gmail always personal?
Addresses ending in @gmail.com are personal. Companies using Google Workspace have their own domain, which we report as business with Google Workspace detected.
What about Outlook.com vs Microsoft 365?
Outlook.com and Hotmail are consumer services; Microsoft 365 runs on the company domain. We tell them apart from their mail servers.
Can I download the provider list?
Yes — the free email providers list is published as open data in TXT, CSV and JSON.