Bouncer Checks SMTP.
BounceZero Checks Everything.

BounceZero adds Bayesian + ML scoring, social signal verification, and plain-English explanations on top of standard SMTP verification. BounceZero's 5-stage pipeline with 65+ signals achieves 99.8% accuracy - more than the ~97-98% from SMTP-only tools like Bouncer.

BounceZero starts at $3 per 1,000 emails with credits that never expire. Bouncer starts at $8 per 1,000 (1,000-credit minimum), falling to $6/1K at 10K, $4/1K at 100K and $2/1K at 1M - verified against usebouncer.com/pricing on 7 August 2026, consistent with our July 2026 review. At entry and mid volumes BounceZero is cheaper; at 1M Bouncer is cheaper per check.

BounceZero provides a confidence score (0-100), risk classification (Deliverable, Risky, Undeliverable), spam trap detection, disposable email detection, and role address detection - plus plain-English explanations that tell you exactly why each email was classified the way it was.

Yes. Export your list from Bouncer as CSV and upload to BounceZero. Column auto-detection handles any format. Use 100 free monthly credits to test before purchasing.

Bouncer is based in Ireland (EU) and is GDPR compliant. BounceZero is also fully GDPR compliant, hosted on OVH UK infrastructure, with a Data Processing Agreement (DPA) available at bouncezero.io/dpa. Both services process email addresses - neither stores the emails you verify beyond the retention period disclosed in their privacy policy.

For lists above 100K emails, BounceZero's pricing is significantly lower ($3/1K vs Bouncer's €8+/1K). Processing speed is comparable at approximately 10,000 emails per minute via bulk upload. BounceZero's bulk jobs run in parallel across multiple workers - no queue waiting even for million-row uploads.