Email verifiers compared: catch-all is where they differ

Email verifiers compared: catch-all is where they differ

List verification isn't optional — a 5% bounce rate tanks domain reputation fast. The split is how each handles catch-all domains.

ZeroBounce
— Pros: scores catch-alls with confidence levels, AI activity data, good accuracy
— Cons: pricier per verification

MillionVerifier
— Pros: cheap, fast, generous free trial, simple bulk
— Cons: marks catch-alls as 'unknown' — you decide the risk

NeverBounce
— Pros: real-time API, solid accuracy, good integrations
— Cons: mid-tier pricing, catch-all handling conservative

The catch-all problem: 20-40% of B2B domains accept all mail, so verifiers can't confirm deliverability. Aggressive tools guess (risky), conservative ones flag unknown (you bounce or skip).

The move: verify, then send to catch-alls only on a separate warmed domain to isolate bounce risk.

Verdict: 4/5 ZeroBounce for accuracy, 5/5 MillionVerifier for price-per-result.

Who it's for: anyone whose bounce rate creeps over 3%.