BillionVerify

What it does

We rebuilt BillionVerify from the infrastructure up — and added the step before verification. Upload limits are gone: drop in a CSV of any size, close the tab, we email you when it's clean. You only pay for definitive answers — unknown results are free, rechecks free for 24 hours. New Email Finder turns a name and domain into a verified work email, one at a time, in bulk, or by company, and only charges on a match. Real-time API, native MCP server, 20 free credits a day.

The email verification tool built for scale. Real-time SMTP checks, bulk list cleaning, and API with 99.9% accuracy. 20 free credits a day, up to 600 a month.

An email checker tells you whether an email address can receive mail before you send to it. The BillionVerify email checker reads each address, looks up mail servers for its domain, and asks a receiving server whether that mailbox exists, all without sending a message. In about a second you get a clear status: valid, invalid, catch-all, disposable, role, or unknown. That is what email verification means in practice: proving an address is real and safe to use, not only that it looks right. A format check catches typing mistakes. Only a live SMTP check shows that a mailbox accepts mail. BillionVerify runs both, so one email verifier covers sign-up forms, sales prospecting, and list cleanup…from billionverify.com

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