ZeroBounce vs NeverBounce on a 12k dirty list

ZeroBounce vs NeverBounce on a 12k dirty list

A marketer inherited a 12,000-row scraped list and ran it through both verifiers before sending.

— ZeroBounce: flagged 2,340 invalid, 890 catch-all, 410 abuse/spam-trap risk
— NeverBounce: flagged 2,180 invalid, 910 catch-all, no trap scoring

Sent the ZeroBounce-cleaned set (removed invalid + traps): bounce came in at 1.1%. The unverified control batch of 500 bounced at 8.6% and the mailbox got temp-blocked.

Pros (ZeroBounce): spam-trap and abuse scoring, activity data.
Pros (NeverBounce): cheaper per credit, faster bulk.
Cons (both): catch-alls stay a coin flip.

Verdict: 4.5/5 ZeroBounce for cold lists, 4/5 NeverBounce for known-clean re-checks.

Who it's for: anyone sending to scraped data. Skip verification only on opt-in lists under 60 days old.