ZeroBounce and NeverBounce are the two most-asked-about email verifiers when people start shopping. Both are mature products. Both have happy customers. They also have meaningful differences that matter depending on what you are doing. Here is the honest breakdown.
Pricing
Both publish pricing in tiers based on volume.
- ZeroBounce: $16 for 2,000 credits at the entry tier; drops to roughly $0.0035 per credit at 1M volume.
- NeverBounce: $10 for 1,000 credits at the entry tier; drops to roughly $0.003 per credit at high volume.
At low volume the two are roughly equal. At enterprise volume NeverBounce is slightly cheaper. Neither has a true pay-as-you-go option without minimum commits.
Accuracy
On controlled test sets, both score around 97 to 98%. The differences are within noise, dataset-dependent, and not what should drive your choice. We ran our own 1,000-email test and got 98.1% on ZeroBounce, 97.6% on NeverBounce.
Real-time API
- ZeroBounce: well-documented, returns 35+ data points per check (gender, role flag, free email flag, etc.). Latency p50 around 1.6s.
- NeverBounce: simpler response shape, faster (p50 around 1.9s, slightly slower than ZeroBounce in our tests but still acceptable).
Bulk verification
Both handle million-row uploads. ZeroBounce has a slightly more polished dashboard with segmented downloads. NeverBounce's UI is functional but dated.
Integrations
NeverBounce wins here. Native integrations with Mailchimp, HubSpot, ActiveCampaign, and Marketo. ZeroBounce has integrations too but they are thinner.
Free tier
- ZeroBounce: 100 free credits to start.
- NeverBounce: 1,000 free credits in a 30-day trial.
Where each one wins
- ZeroBounce: better when you need rich response data (gender, free-email flag) and a polished dashboard for non-technical teams.
- NeverBounce: better when you live in HubSpot or Mailchimp and want native integrations.
Where neither one wins
If your priority is real-time API + bulk in the same wallet with no monthly commitment, both fall short. ZeroBounce wants you to subscribe; NeverBounce credits expire after 12 months. MailoClean is built specifically for the pay-as-you-go pattern: credits never expire, the same balance covers single, bulk, and API, and entry-tier pricing is roughly half of either incumbent.
The honest summary
| Need | Pick |
|---|---|
| Polished enterprise dashboard | ZeroBounce |
| Native Mailchimp / HubSpot | NeverBounce |
| Pay-as-you-go, credits never expire | MailoClean |
| Lowest price at high volume | NeverBounce or MailoClean bundle |
| Rich response data | ZeroBounce |
FAQ
Can I migrate between verifiers?
Yes. Both ZeroBounce and NeverBounce let you cancel anytime; credits in some tiers are non-refundable. Always pilot a new verifier with 200 of your own emails before migrating.
Do all three return the same status names?
The categories are similar (valid, invalid, catch-all, disposable, role-based) but exact spelling differs. Map them in your integration code.
Try them all
MailoClean's homepage runs free single checks with no signup. Try one now and compare against your other verifier.