About
We built the verifier we wished existed.
A product by Elevate Clients Inc.
Single-engine tools left a quarter of every list unresolved. So we built something that doesn’t.
We spent years running cold email campaigns and buying credits from every major email verification service. The results were always the same: 70-80% of the list came back clean, and 20-30% came back as “catch-all,” “accept-all,” or “unknown.”
That 20-30% is the most valuable segment of a B2B list. Catch-all domains include Microsoft 365 tenants, Google Workspace accounts, and most enterprise mail servers. Marking them as “unknown” and skipping them means leaving the best contacts on the table.
Different verification engines have different strengths. The primary engine we use is fast and reliable for obvious bounces. The secondary engine specializes in deep SMTP-level verification of catch-all domains using waterfall routing techniques most verifiers don’t attempt.
LeadList Verifier combines both into a single workflow. Upload once, get results from two engines. The first pass handles the easy 70-80%. The second pass resolves the hard 20-30%. You get a definitive answer for every email.
Principles
How we build.
Accuracy over speed
Two verification engines because one isn't enough. The extra pass takes a few more minutes and resolves thousands of unknowns. We won't trade correctness for a faster benchmark number.
Pay for what you use
No subscriptions. No monthly minimums. No expiring credits. Buy a pack when your list is ready, verify, download. Credits stay valid forever.
Trust through transparency
Every credit movement is logged in your transaction history. Failed jobs auto-refund. The dashboard shows exactly what's happening, not a spinner.
Built for engineers
REST API, CSV uploads, webhook delivery, audit logs. Built by developers who verify their own lists every week.
2
Verification engines run in sequence
<200ms
Median single-email verification
100
Free credits on every signup
Try the two-pass difference.
100 free credits on signup. No credit card required.