Discover, enrich, and verify professional business contacts from trusted sources, then turn your leads into opportunities. Every result shows where it came from and how sure we are, so you never send into the dark.
No inferred address is ever labelled verified. Try the live engine →
Awaiting input. This box runs the real verification engine the moment you press Run: syntax, disposable and role detection, and a live MX lookup.
Give us a person and their company domain. LeadOS infers the most likely address from the domain's email convention, ranked by how common each pattern actually is, then checks the domain live. You see every candidate it considered, not just the winner.
Syntax, disposable and role detection, live MX lookup, and a mailbox-level SMTP probe that never sends a message. Catch-all domains are flagged, not guessed. You get a scored verdict and a full diagnostic trace explaining exactly how we got there.
Source, method, and confidence travel with each value. When a contact is inferred from a pattern, it says so. When broad discovery has no connected data source, the product tells you plainly instead of inventing a result. No fabricated people, ever.
A find or a verify costs one credit. A failed check never costs you anything.