ZeroBounce review: email verification and deliverability tools

What is ZeroBounce?

ZeroBounce is an email verification and deliverability platform operated by Hertza L.L.C. from Santa Barbara, California. It has been running for 10+ years. Its tools follow three steps:

1. Clean your list: email validation finds invalid, disposable and inactive addresses, spam traps, abuse emails and catch-all domains; AI scoring rates how likely a catch-all or risky address is to engage; Activity Data shows recently active recipients; Email Finder and Domain Search look up professional addresses.
2. Build sender reputation: inbox warmup, inbox placement tests and email server tests check your setup before a campaign.
3. Monitor: blacklist monitoring and DMARC monitoring catch problems early.

ZeroBounce guarantees 99.6% validation accuracy, says it cleans 1 million addresses on popular domains such as Gmail in under 45 minutes (250,000 on less common domains take up to 2.3 hours), and offers 40+ integrations with email marketing platforms, CRMs and website builders. On security, it lists SOC 2 Type II and ISO 27001 certification and GDPR, HIPAA and CCPA compliance; uploaded files are deleted after 30 days.

Who ZeroBounce is for

• Email marketers cleaning an old or imported list before a campaign, to cut hard bounces and protect sender reputation.
• Sales and outreach teams who need verified B2B addresses and an email finder.
• SaaS and ecommerce sites that verify addresses at sign-up through the real-time API.
• Agencies managing deliverability for several clients.

ZeroBounce does not send email itself; pair it with a sender such as those in the EmailOctopus review or the Moosend review. More tools are on our marketing and SEO page.

ZeroBounce pricing

Validation and scoring cost one credit per address; Email Finder uses 20 credits per successful search. Unknown results and duplicates are free. Prices in USD, October 2026:

The $99 ONE plan also includes 250 warmup seeds, 100 inbox placement tests, 10,000 Email Finder or Domain Search queries, 10 blacklist monitors, 1 DMARC monitor domain and 100 email server tests, plus Activity Data, faster file processing and VIP 24/7 support. Subscribers get 15% off extra pay-as-you-go credits, and their unused credits roll over.

Payment goes through Stripe, in most major currencies; the checkout defaults to your region's currency.

Why choose ZeroBounce

You only pay for definite answers: unknown results and duplicates cost nothing, and the free tier refills every month, so small senders can check a few addresses without paying. Pay-as-you-go credits suit occasional cleanups, while ONE bundles verification with warmup and monitoring for teams that send every week. Catch-all validation and AI scoring help with the addresses many verifiers can only mark as risky.

Good to know: credits, refunds and cancellation

• Credit expiry: for accounts registered after June 1, 2026, purchased credits expire two years after your most recent credit purchase; they do not expire while you have an active ONE subscription.
• Free credits: the 100 monthly validations require signing up with a business or premium email domain.
• Money-back guarantee: only for a first ZeroBounce ONE subscription, within 30 days, and only if you have used little of it (for example no more than 500 emails validated).
• Cancellation: ONE is month-to-month; cancel in the billing section of your account or through support, effective from the next billing date.
• Support is available 24/7, with phone lines in the US and UK and email at support@zerobounce.net.