The email verification service that confirms every mailbox exists before you send. 99.9% SMTP accuracy, real-time API, and bulk list cleaning in one platform.
Validate one email before it enters a lead list, signup flow, or outbound workflow. The result shows status, SMTP verification, MX records, and reputation details in one product surface.
Every check runs automatically on every request — bulk or API.
Check individual emails for validity, deliverability, and reputation. No account required.
Identify and block temporary email services before they pollute your list.
Detect emails likely to bounce before sending, protecting your sender reputation.
Four automated checks run in sequence for every address.
Validates format against RFC standards. Catches typos, invalid characters, and structural errors instantly.
Confirms the domain exists and has valid mail server records configured to receive email.
Opens a real connection to the receiving mail server. No test email sent, no spam risk.
Verifies the specific address exists on the server and is deliverable before you send.
Fast enough for sign-up forms, reliable enough for production pipelines.
<200ms
Cached Latency
Previously seen addresses
1–3s
Full SMTP Check
Complete verification
99.9%
Accuracy
SMTP-level precision
99.99%
Uptime
Enterprise reliability
Every verification tool in one platform.
Upload lists of any size and get clean, export-ready results with status breakdown.
Remove invalid, risky, and inactive addresses to improve deliverability before every campaign.
Verify addresses in real time during signup, enrichment, or automation workflows.
BillionVerify achieves 99.9% accuracy through a real SMTP connection to each mailbox. The process covers syntax validation, MX record lookup, and direct SMTP handshake — confirming the specific address exists before you send.
Previously seen addresses return in under 200ms from cache. A full SMTP verification completes in 1–3 seconds. Bulk jobs process up to 50,000 emails per hour.
All data is protected with 256-bit SSL encryption. BillionVerify is fully GDPR and CCPA compliant. Email addresses are automatically deleted after processing and never shared with third parties.
Verification catches invalid, disposable, and risky addresses before you hit send. Removing syntax errors, dead domains, and non-existent mailboxes upfront eliminates the hard bounces that damage sender reputation.
The Starter plan is $20 for 20,000 credits at $0.001 per email — the lowest per-email rate of any major email verification service. Volume pricing scales down to $0.00035 per email at 1M credits. A free tier provides 100 verifications daily with no credit card required. See the full email verification pricing on our pricing page.
Yes. You get 100 free verifications every day — no credit card, no signup required. The free tier includes all features: syntax checks, domain verification, SMTP validation, and disposable email detection.
To verify an email address, BillionVerify runs four checks automatically: (1) syntax validation against RFC standards, (2) domain existence and DNS lookup, (3) MX record check to confirm the domain accepts mail, and (4) a direct SMTP handshake to confirm the specific mailbox exists. The full process completes in under 3 seconds with no test email sent.
An email verification service checks whether an email address is real, deliverable, and safe to contact before you send. BillionVerify goes beyond basic syntax checking with real SMTP-level mailbox verification — confirming the specific address exists on the receiving mail server. This eliminates hard bounces, spam traps, and disposable addresses from your list.
SMTP-level verification with 99.9% accuracy. Real-time API and bulk processing included.
100 free verifications daily · 99.9% SMTP-level accuracy · No credit card required
