Honest comparison
MailTester vs ZeroBounce
ZeroBounce is one of the biggest names in email verification, and it earned that position. The question is whether you need everything it bundles — and whether you should pay roughly double per verification for it.
The honest version
Where each tool genuinely wins
Choose MailTester for
- Well under half the price at volume — $159 vs ~$390 per 100K
- Inbox placement testing and blacklist monitoring included, not sold separately
- Anti-greylisting engine turns more “unknowns” into definitive answers
- Credits never expire — no use-it-or-lose-it pressure
ZeroBounce is strong at
- Strong enterprise compliance story (SOC 2, GDPR tooling)
- Data append services (name, location) on top of verification
- A large partner and integration ecosystem
Features
Feature by feature
| Feature | MailTester | ZeroBounce |
|---|---|---|
| Real-time SMTP verification | Yes | Yes |
| Disposable & role detection | Yes | Yes |
| Anti-greylisting retries | Yes | Yes |
| Inbox placement testing included | Yes | No |
| Blacklist monitoring included | Yes | No |
| Team accounts with shared credits | Yes | Yes |
| Credit expiry | Never expire | Never expire |
| Free tier | 100 verifications | 100/month |
Price comparison
| Feature | MailTester | ZeroBounce |
|---|---|---|
| 5,000 verifications | $19 | ~$39 |
| 100,000 verifications | $159 | ~$390 |
| 1,000,000 verifications | $499 | ~$2,250 |
Published list prices as of June 2026, rounded. Always confirm current pricing on the vendor's site.
The bottom line
If you need data appends and enterprise procurement boxes ticked, ZeroBounce is a fine choice. If you need accurate verification plus deliverability tooling at the best per-email price, MailTester does the same core job for roughly half the cost.
Test us against ZeroBounce on your own list.
Run the same 100 addresses through both — your first 100 verifications here are free, so the experiment costs nothing.