NeverBounce is a specialized email verification and list-cleaning service designed to help organizations improve deliverability, reduce bounce rates, and maintain a healthy sender reputation. Founded in 2014 in Cleveland, Ohio by Brad Owen, the company set out to solve the problem of inaccurate and stale email data using a fast, API-first approach rather than slow, manual list processing.
The product is organized around four core components: Clean (bulk list verification), Verify (real-time single or small-batch checks), Sync (ongoing automated list hygiene synced with email service providers), and Integrate (developer tools such as REST APIs, JavaScript widgets, and webhooks). Under the hood, NeverBounce runs a proprietary, multi-step verification workflow that combines syntax checks, DNS and MX lookups, SMTP handshakes, and heuristics to classify addresses as valid, invalid, disposable, accept-all, or unknown. It also appends additional metadata and preserves all custom columns from uploaded files.
In March 2019, NeverBounce was acquired by DiscoverOrg, which subsequently rebranded as ZoomInfo. The technology has since been embedded into ZoomInfo’s broader go-to-market data platform, while the NeverBounce product continues to be sold as a standalone service for customers that just need email verification. As part of ZoomInfo, NeverBounce benefits from deeper integrations into popular CRMs and marketing tools and is marketed as "NeverBounce by ZoomInfo" in many partner directories and marketplaces.
Today, NeverBounce reports being trusted by well over 100,000 organizations globally for one-off list cleaning, ongoing database hygiene, and point-of-entry email validation in signup flows and lead capture forms. While customers consistently praise its speed, integrations, and ease of use, more recent reviews also highlight concerns around rising prices, stricter credit-expiration policies, and inconsistent support responsiveness, especially for smaller accounts.