ZeroBounce is an online email validation and list‑cleaning service that helps businesses improve their email deliverability. It scans and verifies email addresses to identify invalid, risky, or high‑risk contacts so marketers send campaigns only to real, active inboxes. The platform claims high accuracy (~99.6 %) and offers bulk and real‑time API validation, along with tools like spam‑trap detection and typo correction. ZeroBounce also emphasizes data security and compliance with standards like GDPR and HIPAA. The service is widely used to clean lists, reduce bounce rates, and protect sender reputation.