Verify Email AddressesSMTP-Level Verification with 99.9% Accuracy

BillionVerify achieves 99.9% accuracy through a multi-layer process that includes syntax validation, MX record lookup, SMTP mailbox confirmation, and disposable email detection. Every address goes through all layers to ensure reliable results.

Bulk verification processes up to 50,000 emails per hour. Upload a CSV file and get cleaned results quickly. For single checks, cached results return in under 200ms, and full SMTP verification completes in 1-3 seconds — ideal for sign-up forms and CRM integrations.

All data is protected with 256-bit encryption and we are fully GDPR and CCPA compliant. Email addresses are automatically deleted after processing, and we never store or share your data with third parties.

We identify invalid, disposable, and risky addresses before you hit send. By catching syntax errors, dead domains, and non-existent mailboxes upfront, most users reduce bounce rates from 15% to under 2%.

Pay-as-you-go starts at $0.005/email. Volume pricing goes as low as $0.001/email for high-volume packages. A free tier provides 100 verifications daily with no credit card required.

Yes. You get 100 free verifications every day with no credit card or signup required. The free tier includes all features — syntax checks, domain verification, SMTP validation, and disposable email detection. Upgrade anytime for higher volume.