8 layers of email validation in one API call. Catch disposable emails, fix typos, verify mailboxes, score risk — before bad data hits your database. Every feature on every plan. No upsells.
Try it — type any email
Disposable or mistyped email passes your form
Welcome email hits a dead inbox and bounces hard
Your ESP flags high bounce rates on your domain
Gmail and Outlook start routing you straight to spam
Paying users never see your emails — revenue disappears silently
Disposable or mistyped email passes your form
Welcome email hits a dead inbox and bounces hard
Your ESP flags high bounce rates on your domain
Gmail and Outlook start routing you straight to spam
Paying users never see your emails — revenue disappears silently
Companies lose an average of $12.9 per invalid email in wasted marketing spend.
Based on the Gartner Data Quality “1-10-100” rule — bad data costs 10x more to clean and 100x more if left unresolved.
Drop-in email validation that blocks fakes, catches typos, and scores every address — plus built-in bulk validation, email finder, and exportable reports. No premium tiers. No locked features. You get everything from day one.
Every signal combined into a single 0–100 score. One number, one decision.
Reject
Review
Safe
Clean entire lists in one go. Upload, validate, download — that simple.
Enter a name and domain. We test common patterns and return the most likely valid address.
One endpoint. Any language. Copy, paste, ship.
Sign up free. Get your key instantly. No approval process, no sales call, no credit card.
POST to /api/v1/verify with the email address. One header, one field. That's it.
Score, verdict, and all 8 checks in one JSON response. Under 50ms every time.
Same validation quality. A fraction of the price. No gimmicks — just honest, transparent pricing side by side.
| Feature | MailSentryBest Value — Try Free | ZeroBounce | NeverBounce | Kickbox |
|---|---|---|---|---|
| Free Plan | Yes, 1,000/mo with all features | No | No | No |
| 10K Emails/Mo Cost | $9 (all features included) | $99 | $49 | $80 |
| 50K Emails/Mo Cost | $29 (all features included) | $379 | $99 | $400 |
| Per-Email Cost (10K) | $0.0009 | $0.0099 | $0.0049 | $0.008 |
| Typo Correction | Yes, automatic in all plans | Yes (standard) | Yes (automatic) | Yes (standard) |
| Risk Scoring | Yes, 0-100 in all plans | Yes (AI, may need sub) | Yes (AI in higher plans) | Yes (proprietary, standard) |
| Setup Time | 30 seconds | Minutes | Minutes | Minutes |
| API Speed | <50ms | ~20ms | ~15ms | <1s |
Pricing based on publicly available information as of March 2026. Prices may vary by plan and region.
No first-month bait. Early adopter pricing — locked in for 12 months.
The price you see today is the price you pay. No surprises after month one.
Lock In Your Price Now →No credit card required. Cancel anytime. Every plan includes all 8 validation layers.
Perfect for experimenting and testing
Ideal for ambitious creators building solo
Fuel your startup's growth engine
Power your platform at scale
Built for teams that move millions
Early adopter pricing — sign up now and your rate is locked for 12 months.
All plans include all 8 validation layers. Upgrade or downgrade anytime.
When you hit your limit, requests pause — no overage charges. Upgrade anytime or buy additional credits from your dashboard for instant access to more checks.
One REST API. No SDKs to install, no plugins to configure. If your language can make an HTTP request, you're ready.
curl -X POST https://api.mailsentry.dev/v1/verify \
-H "X-API-Key: your-api-key" \
-H "Content-Type: application/json" \
-d '{"email": "jane@example.com"}'{
"email": "jane@example.com",
"score": 92,
"verdict": "valid",
"checks": {
"syntax": true,
"mx_records": true,
"smtp_valid": true,
"disposable": false,
"role_based": false,
"free_provider": false,
"did_you_mean": null
}
}If it can make an HTTP request, it works with MailSentry.
View API DocumentationLock in launch pricing before we raise it. Get your API key in 30 seconds. 1,000 checks/month free. No credit card, no commitment.