A bad email in a prospecting list is costly: it degrades sender reputation, inflates bounce rates, and eventually sends your campaigns to spam. BillionVerify, formerly known as EmailVerify.ai, positions itself precisely on this problem. It’s a platform dedicated to verifying email addresses that checks, before sending, whether an address actually exists and is capable of receiving messages. The tool relies on real-time SMTP verification, which it claims is 99.9% accurate, and on a very aggressive pricing model compared to historical players in the sector. Whether you’re doing B2B cold email, managing client lists in an agency, or validating signups on an online store, the goal remains the same: keep only clean addresses. In the sections that follow, we detail what BillionVerify actually is, its features, use cases, advantages, pricing model, and our conclusion.
What is BillionVerify?
The essentials
BillionVerify is an online email verification service. Its role is to determine whether an address is valid, active, and deliverable, without having to send it a real message. To do this, it combines several checks: syntax verification, control of the domain’s MX records, then SMTP verification that directly queries the receiving server. Added to this are specialized detections: disposable addresses, generic accounts like info@ or contact@, catch-all domains, and spam traps. The product exists in three complementary usage modes: verification of a single address, bulk processing via CSV file import, and an API to automate validation in applications or conversion funnels. It addresses both marketers and developers.
Key features
BillionVerify revolves around several key features. Individual verification returns a detailed status: SMTP results, MX records, deliverability score, and reputation information. Bulk verification allows you to import a CSV file with live progress tracking, email notifications, and segmented results ready for export, accompanied by validity distribution charts. The real-time API returns structured JSON responses and executes SMTP verification at the heart of workflows, which is useful for validating an address at the moment of signup. On the detection side, the tool identifies disposable addresses, bounces, catch-all domains with confidence scores, role-based accounts, and spam traps. A white-label service allows agencies to offer verification under their own domain, with client spaces and brand control. Finally, integrations cover nine named tools (Mailchimp, SendGrid, HubSpot, Salesforce, ActiveCampaign, Klaviyo, Pipedrive, Zapier, Make) plus a WordPress plugin, to connect verification to your existing setup.
Use cases
BillionVerify’s uses revolve around the quality of sending lists. In B2B cold email prospecting, it serves to clean a purchased or scraped base before the first sequence, to protect the sender domain’s reputation. Agencies use it to sanitize their clients’ lists and guarantee correct deliverability rates. In e-commerce, verification at the moment of signup prevents registering false or disposable addresses, which improves base quality and limits fraud. SaaS teams use it for account creation fraud prevention. Sales reps targeting local businesses verify collected addresses before outreach. In all these scenarios, bulk mode for periodic cleaning and the API for real-time validation naturally complement each other.
Advantages
The first benefit is financial and operational: by removing invalid addresses, you reduce bounce rate, protect sender reputation, and prevent campaigns from landing in spam. The second is the simplicity of the free model: 100 verifications per day offered permanently, without a credit card, allow you to test the tool on real samples before any commitment. The third is usage flexibility: interface for non-technical users, CSV files for high volumes, API for developers. The announced cost, around $0.001 per verification on packs, remains very low compared to traditional solutions, making the tool accessible to freelancers and SMEs alike. Finally, the many integrations avoid manual exports and insert verification directly into tools already in use.
Pricing
BillionVerify offers a permanent free tier of 100 verifications per day, including syntax and domain validation, disposable detection, and SMTP verification, with no payment information required. Beyond that, one-time credit packs are available: 20,000 credits for $20, 50,000 for $45, 100,000 for $80, 200,000 for $150, 500,000 for $200, and 1 million for $350, or roughly $0.001 per credit with increasing volume discounts. Monthly and annual subscriptions also exist, with up to 60% savings on the annual plan, but their exact price is not publicly displayed. Payments go through card, PayPal, or wire transfer, via Stripe.
Conclusion
BillionVerify is a focused and effective tool for one precise task: cleaning your email lists before sending. Its SMTP verification, its detection of problematic addresses, its API, and its integrations make it a solid technical link for prospecting and e-commerce. The daily free offer and readable credit packs make it easy to try and affordable. It’s not a complete email platform: you’ll need to pair it with a sending tool. For those who mainly want to reduce their bounce rate and protect their sender reputation, it’s a pragmatic solution worth testing on your own data.