BillionVerify is a professional email verification service that helps businesses validate email addresses with 99.9% accuracy before sending.Bad email data costs businesses money. Every bounced email hurts sender reputation, wastes marketing spend, and skews campaign analytics. BillionVerify solves this by verifying email addresses through multi-layer checks — syntax validation, domain verification, MX record checks, SMTP mailbox verification, and AI-powered detection — all in under 300ms.What we detect:- Invalid and non-existent email addresses- Disposable and temporary emails- Role-based addresses (info@, support@, admin@)- Spam traps that can get your domain blacklisted- Catch-all domains that accept any addressHow businesses use BillionVerify:- Clean subscriber lists before email campaigns to reduce bounce rates- Verify user emails at signup to block fake registrations- Validate prospect data before sales outreach- Maintain list health with regular bulk verificationWe integrate with 25+ platforms including Mailchimp, HubSpot, Salesforce, Klaviyo, SendGrid, Zapier, and Make. Our REST API with webhooks enables custom integrations with any workflow.Since launch, BillionVerify has verified over 1 billion emails for 10,000+ businesses across 200+ countries.Pricing starts at $0.8/month with credit-based plans. One-time packages are also available. Every new account gets 100 free verification credits — no credit card required. Credits never expire.All data is processed through TLS encryption and is not stored after verification.
Written by the business, not verified by us.Billionverify (billionverify.com) has a 4.6 out of 5 rating on OK.one, based on 14 user reviews collected here. It is listed under Electronics & Technology and its reputation is excellent. Praise is nearly unanimous, with 93% rating it 4 stars or higher; The business has replied to 100% of negative reviews. Last updated 2026-10-25.
After verifying, export is not working. Saying : Failed to download results
Danny, we're sorry you couldn't download your results after verification. We've identified the issue and will fix it right away. Thank you for flagging this and sharing the exact error message. — BillionVerify Team
Billionverification is the best email verifier ever, and they have been easiest platform to use
Thank you, Adedayo. We're glad BillionVerify has been so easy to use. We designed the platform to make email verification straightforward, with bulk CSV uploads for checking a whole list in one place. We appreciate your recommendation and you taking the time to share your experience. — BillionVerify Team
Thank you, Rana. We're glad you're finding BillionVerify useful for email verification. Our checks cover syntax, DNS, MX, and SMTP to help you assess the addresses on your list. We appreciate your support. — BillionVerify Team
api works, but sometimes it always warn me credit not enough, but actually no.
Thank you, Rotomold Luban. We're glad the API is working for you. We built it to make email verification straightforward to integrate into your workflow. We take your feedback about insufficient-credit warnings seriously. Clear, reliable balance messages matter, and we appreciate you flagging this alongside your positive experience with the API. — BillionVerify Team
BillionVerify is a professional email verification service that helps businesses validate email addresses
Thank you, Ovidiu. We're glad BillionVerify has been helpful for validating email addresses. Our verification combines syntax, DNS, MX, and SMTP checks to help businesses make informed decisions about their email lists. We appreciate your review and your support. — BillionVerify Team
Thank you, Doxa. We built BillionVerify to make email verification simple: every address goes through syntax, DNS, MX, and SMTP checks, and you get a clear result you can act on. Catch-all addresses are reported as their own category instead of being counted as valid, and unknown results aren't charged. We appreciate you taking the time to leave a review. — BillionVerify Team
Thank you, Dr. Daniel. Value is something we deliberately build into how verification is priced: unknown results aren't charged, so you only pay when we can give you a definitive answer, and purchased credits never expire. We also report catch-all addresses as their own category rather than counting them as valid, which keeps the results honest about what you're actually getting. We appreciate you taking the time to share this. — BillionVerify Team
I run an AI voice-agent business and verify the emails for my B2B lead pipeline through BillionVerify before any outreach goes out. It's been genuinely solid for us. The thing that impressed me most is how it handles the "unsure" domains — the catch-alls and marginal addresses where other tools just throw up an ambiguous result. BillionVerify actually resolves a much higher portion of those, so I'm not scrubbing leads that might have been good, or worse, keeping bad ones. For my outbound volume, that granularity is worth more than the raw accuracy figure. On top of that, the pricing is the best I've found for what you get. Most comparable services want more per email, especially at the batch sizes I run. BillionVerify is cheap enough that verifying my list costs almost nothing against what bad data would cost me in bounced emails and burned sender reputation. The verification itself is fast and the API is straightforward to plug into my workflow. Honest rec — if you're doing heavy lead gen and just want clean data without the premium price tag, this does the job.
Thank you, Lewis. We're glad BillionVerify has become a dependable part of your AI voice-agent lead pipeline. We built the API for straightforward integration and designed our results to keep ambiguous cases visible: catch-all addresses are reported separately rather than counted as valid, and unknown results aren't charged. That granularity helps teams protect sender reputation without automatically discarding potentially valuable B2B leads. It's great to hear the speed, clarity, and pricing are delivering value at your outbound volume. We appreciate the thoughtful recommendation. — BillionVerify Team
Fantastic and accurate! It's got a clean UI, detailed generation of email verification results, and it's just as accurate as MillionVerifier.
Thank you, Kris. We designed BillionVerify to pair a clean, straightforward interface with detailed verification results, so teams can understand each address instead of receiving only a pass-or-fail label. It's great to hear the accuracy has matched your expectations and that BillionVerify compared so well in your workflow. We appreciate your support. — BillionVerify Team
BillionVerify is a professional email verification service that helps businesses validate email addresses with 99.9% accuracy before sending. Bad email data costs businesses money. Every bounced email hurts sender reputation, wastes marketing spend, and skews campaign analytics. BillionVerify solves this by verifying email addresses through multi-layer checks — syntax validation, domain verification, MX record checks, SMTP mailbox verification, and AI-powered detection — all in under 300ms. What we detect: - Invalid and non-existent email addresses - Disposable and temporary emails - Role-based addresses (info@, support@, admin@) - Spam traps that can get your domain blacklisted - Catch-all domains that accept any address How businesses use BillionVerify: - Clean subscriber lists before email campaigns to reduce bounce rates - Verify user emails at signup to block fake registrations - Validate prospect data before sales outreach - Maintain list health with regular bulk verification We integrate with 25+ platforms including Mailchimp, HubSpot, Salesforce, Klaviyo, SendGrid, Zapier, and Make. Our REST API with webhooks enables custom integrations with any workflow. Since launch, BillionVerify has verified over 1 billion emails for 10,000+ businesses across 200+ countries. Pricing starts at $0.8/month with credit-based plans. One-time packages are also available. Every new account gets 100 free verification credits — no credit card required. Credits never expire. All data is processed through TLS encryption and is not stored after verification
Thank you for taking the time to share such a detailed review. We're glad BillionVerify's multi-layer verification, bulk list cleaning, integrations, and real-time API stood out to you. We built the platform to make accurate email validation straightforward for both marketing teams and developers, and it's great to know that came through in your experience. We truly appreciate your support. — BillionVerify Team
Billionverify is the best tool to verify emails. The interface is user friendly and super easy to use. The results provided by Billionverify are 99.99% accurate.
Thank you, Mujtaba. Making verification simple was a deliberate design goal — upload a CSV or call the API, and you get a clean, actionable result without wading through settings. Under that simple interface is a validation engine built for 99.9% accuracy, with sub-300ms API responses and disposable, role-based, and catch-all detection running on every check. Great to hear it's delivering the results you expected.
I'm not massively technical but I've found this extremely easy to use and setup for my own business and my clients. It's greatly improved the quality of our email addresses - and the engagement / support from the founder (Leo) is great.
Thanks, Will. You've described exactly who we build for — you shouldn't need to be technical to keep your lists clean. Bulk CSV cleaning, 25+ integrations, and a real-time API are all there when you want them, all running at 99.9% accuracy, so managing your own lists and your clients' stays straightforward either way. And we intend to keep support hands-on as we grow. Glad it's made a real difference to your email quality.
Great tool, but they ate up my credits a while ago. Regarding cleaning the email lists, they're even better than Never Bounce, but they eat up your credits!.
Glad to hear our list cleaning came out ahead of NeverBounce for you — that's exactly the kind of result BillionVerify is built for: real-time verification with 99.9% accuracy so every list you clean actually gets cleaner, not just smaller. We also take credit efficiency seriously and keep refining our validation logic so credits are spent on genuine verification work. Thanks for the feedback and for using BillionVerify.
I like billionverify for it being user-friendly and really easy to use and actually deliver what it promises to do, and extremely fast at doing so
Glad it’s working well for you. BillionVerify is designed as a fast, accurate email verification and validation service to help clean email lists and improve deliverability. Great to hear it’s delivering as expected.
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