ZeroBounce Cleans Lists.1Lookup Prevents Problems.

ZeroBounce focuses on cleaning existing email lists—1Lookup prevents bad emails from entering your system in the first place. Real-time validation, fraud detection, and superior accuracy for modern businesses that need instant results.

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Real-Time Validation

ZeroBounce requires file uploads and processing time. 1Lookup validates emails instantly at 120ms for form validation and user registration.

120ms response time

Real-time API

Better Accuracy

Enterprise deliverability accuracy vs ZeroBounce's 97%. Our advanced algorithms and real-time verification deliver superior results.

Advanced fraud detection

SMTP + DNS + heuristic checks

Prevention > Cleanup

Prevent bad emails at the source with instant validation during signups and forms— no more clean-up cycles.

Block disposable emails

Role/account risk signals