What's the best email verification provider?

Question

NeverBounce validated my emails as valid but I got 13% bounce rate. What providers are more accurate?

GTM Practitioner · Accepted Answer

Single-provider validation is unreliable. Different providers have different strengths. Provider comparison (community feedback): | Provider | Strengths | Weaknesses | Cost |
|----------|-----------|------------|------|
| ZeroBounce | Good accuracy, fast | Expensive at scale | $0.008/email |
| MillionVerifier | Cheap, good catch-all detection | Slower | $0.0004/email |
| NeverBounce | Fast, good API | High false positive rate (13%+ bounces reported) | $0.008/email |
| Findymail | Validates during enrichment | Can miss some invalids | Included in enrichment |
| LeadMagic | Good accuracy | Can be expensive at scale | $0.01/email | Recommended strategies: - For cold email campaigns (strict): Use ZeroBounce + MillionVerifier together (both must pass), reject catch-alls
- For CRM enrichment (moderate): Single provider (ZeroBounce), accept catch-alls for nurture
- For budget-conscious: MillionVerifier alone, reject catch-alls

What's the best email verification provider?

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Provider	Strengths	Weaknesses	Cost
ZeroBounce	Good accuracy, fast	Expensive at scale	$0.008/email
MillionVerifier	Cheap, good catch-all detection	Slower	$0.0004/email
NeverBounce	Fast, good API	High false positive rate (13%+ bounces reported)	$0.008/email
Findymail	Validates during enrichment	Can miss some invalids	Included in enrichment
LeadMagic	Good accuracy	Can be expensive at scale	$0.01/email