Email validation,
at factory prices.
The same industry-grade verification the big players use — at 30× less.
98.42% accuracy. 50,000 daily credits. $49 a month. No asterisks.
Trusted by teams at
Six things. All of them done.
We didn't build a 47-feature platform. We built the email validator we wished existed when we were paying $499/mo to send 100k emails.
Single verify
Paste one email. Get an instant valid / invalid / catch-all verdict in under 200ms — with SMTP, MX and syntax check.
Bulk CSV upload
Drag in a list of 1,000 or 1,000,000. We process it in parallel, deduplicate, and stream results you can export.
Catch-all detection
MailboxVerifier doesn't just stop at valid / invalid. It surfaces the catch-all addresses that quietly wreck your sender reputation.
Real-time dashboard
A live history of every job, every result, every status. Filter, sort, re-verify, export — your data is never locked away.
Built for cold emailers
Drop your bounce rate from 8% to under 1%. Protect your domain reputation. Stop paying mailbox providers to reject you.
Honest, plain pricing
$49 a month. 50,000 daily credits. That's the whole pricing page. No seat fees. No usage tiers. No enterprise upsell.
Three steps.
Zero learning curve.
You don't need to read a manual. You don't need a sales call. You sign up, you verify, you ship.
Paste or upload
Drop a single email into the verify box — or upload a CSV with up to a million rows. We auto-detect the column.
We run the checks
Syntax, MX records, SMTP handshake, role-account and disposable heuristics — run in parallel across our infrastructure.
Get clean results
Each row comes back tagged valid, invalid, or catch-all. Filter, sort, and export to CSV in two clicks.
Numbers, not adjectives.
We measure, we publish, we don't round up. Here's exactly what the platform is doing right now.
Where 98.42% actually comes from.
Every release is scored against a labelled corpus of 100,000+ addresses. Ground truth is established by manual SMTP probes. We retest weekly and publish every number.
Same engine. Wildly different invoice.
The other guys built email validation in 2014 and never re-priced it. We re-built the stack from scratch and decided to pass the savings to you.
One endpoint. The whole validator.
One POST, a Bearer token, and a JSON body. You get a verdict, a machine-readable status, and your remaining credits in under 200ms. No SDK lock-in, no GraphQL, no surprises.
https://api.mailboxverifier.com/v1/validateBearer ev_…application/json{ "email": "..." }curl -X POST https://api.mailboxverifier.com/v1/validate \
-H "Authorization: Bearer ev_3f7c2a91b4e8d6f0" \
-H "Content-Type: application/json" \
-d '{"email":"founder@stripe.com"}'{
"email": "founder@stripe.com",
"status": "valid",
"code": 1,
"message": "OK",
"creditsRemaining": 49831
}
{
"email": "dead@nobody.invalid",
"status": "invalid",
"code": 2,
"message": "Mailbox does not exist",
"creditsRemaining": 49830
}
Four statuses. That's the whole vocabulary.
One plan.
The whole product.
We don't do tiers, add-ons, or "contact sales". You get everything for a flat $49/month.
- 1,000 free credits to try
- 50,000 daily credits
- Bulk list cleaning
- Single email verification
- API access
- Enterprise-grade accuracy
- Credit top-ups available
- ✕Annual lock-in
- ✕Seat fees
- ✕Usage-tier upsell calls
- ✕Hidden per-feature paywalls
30× more affordable than the cheapest competitor. · Try it free. If we're not the best validator you've ever used, keep your data.
Questions we get a lot.
Can't find what you're looking for? Email hi@mailboxverifier.com — a real person will write back.
Stop overpaying
for valid emails.
50,000 daily verifications. 98.42% accuracy. $49 a month.
If that sounds too good, start the free trial and prove us wrong.