BillionVerify

BillionVerify is a professional email verification service built to solve one problem: bad email data costs businesses money. Every bounced email hurts sender reputation, wastes marketing spend, and skews campaign analytics. We built BillionVerify to give teams of every size access to accurate, fast, and affordable email verification. Since launch, our platform has processed over 1 billion email verifications for businesses across 200+ countries, covering everything from single API lookups at signup to bulk list cleaning of millions of records. Invalid email addresses are the hidden tax on email marketing. They inflate list sizes, trigger bounces, damage sender scores, and ultimately reduce the number of real people who see your message. Our mission is to eliminate that waste. We built a multi-step verification pipeline that goes beyond surface-level syntax checks. Every email submitted to BillionVerify passes through format validation, DNS and MX record lookups, SMTP connection testing, and mailbox confirmation. This layered approach is why we maintain 99.9% accuracy across providers worldwide. We also believe verification should be accessible. That is why we offer 100 free daily verifications, API pricing starting at $0.001 per email — only $1 for 1,000 emails — with volume discounts down to $0.00014 per email, and a pay-as-you-go model with no monthly minimums. Whether you are a solo founder cleaning a prospect list or an enterprise team verifying millions of records per month, BillionVerify scales to fit. What We Offer Real-time verification API with 99.9% accuracy and response times under 300ms, designed for signup forms, checkout flows, and CRM integrations Bulk email list cleaning that processes up to 50,000 emails per hour with progress tracking, duplicate removal, and exportable reports in CSV and Excel formats Disposable email detection that identifies temporary and throwaway addresses from thousands of known providers, blocking fake signups before they enter your database Role-based email identification that flags generic addresses like info@, support@, and admin@, helping you reach actual decision-makers instead of shared inboxes Catch-all server detection that identifies domains configured to accept all emails, giving you accurate risk assessment for addresses that cannot be confirmed at the mailbox level Spam trap detection and sender reputation protection that identifies known honeypot addresses before they trigger blacklisting or deliverability penalties Why Choose BillionVerify? With over 1 billion emails verified, we have tested our systems against every major email provider, regional ISP, and enterprise mail server configuration. Our global verification infrastructure is distributed across multiple regions to ensure consistent speed and reliability regardless of where the target mailbox is hosted. The API responds in under 300ms, and our bulk processing engine handles up to 50,000 emails per hour. We support 25+ native integrations with popular marketing platforms and CRMs, plus a well-documented REST API for custom implementations. Our verification results include detailed status codes, risk scores, and actionable flags so you can make informed decisions about every address on your list.