Email verification
ZeroBounce
Checking email lists before a campaign
ZeroBounce checks email addresses through bulk uploads and a real-time API. It is useful for identifying invalid or unresolved addresses before a list moves into a sending platform.
Our research notes
Keep each returned status and verification date with the address. Treat unknown results as unresolved, then apply a separate rule for which contacts are eligible to enter the campaign.
Why choose it
Bulk and API validation suit both spreadsheet reviews and automated list preparation. The service separates validation from additional scoring, which helps teams choose the checks they actually need.
What to consider
Validation is not permission to send and does not prove current employment or interest. Scoring uses additional credits, and credit-expiry rules depend on the subscription and purchase terms.
Pricing
ZeroBounce lists 100 free monthly verifications for signups with a business or premium domain. Pay-as-you-go starts at $39 for 2,000 validations; ZeroBounce ONE is listed at $99 per month. Validation costs one credit per address, with no charge for unknown results.
Pricing checked 28 October 2026. Billing terms, taxes, usage limits and add-ons can change. See the vendor's pricing. (opens in a new tab)