ZeroBounce

ZeroBounce is an email validation and deliverability tool. It checks whether email addresses are real, active, and safe to send to before they enter your outreach - catching invalid, disposable, and spam-trap addresses that would otherwise damage your sending domain. In a recruiting or business development workflow it's the hygiene step before a send: clean an enriched candidate or prospect list so bounces don't spike. It runs in bulk or in real time via API, and pairs with enrichment providers as a final verification pass.

• Clean a sourced candidate list before an outreach sequence to cut hard bounces.
• Score catch-all addresses that validation cannot resolve, then decide who to send.
• Verify addresses through the API as they enter your ATS/CRM, not in a batch later.

• Teams sending at volume where hard bounces are already a real problem.
• Not for small lists; entry is $99/mo with a 10,000-credit minimum.
• Buyers who need third-party security certifications on file for a vendor.

Zerobounce holds a 4.7/5 rating on G2 across roughly 1,361 reviews. Reviewers consistently praise validation accuracy and deliverability scoring for protecting sender reputation; the most common criticism is that pricing feels expensive at higher volumes. The free tier is appreciated for validating small lists before committing.

Consolidated from 1367 reviews across G2 · Updated April 23, 2026