An email verification service used to check deliverability before a list goes into a cold email campaign.
Visit the ValidTo website →Verifying a list built from permutation or enrichment before it ever hits a sending inbox.
Catching invalid or risky addresses before they damage sender reputation
Verifying emails generated by a permute-and-check workflow, not just scraped ones
A final check step before any list goes live in a campaign
ValidTo is our standing choice for list verification — it's the last step before anything goes into a sending platform, on every list regardless of source.
We haven't found a reason to swap it out. Verification is one of those steps where consistency matters more than chasing marginal differences between providers, so we don't re-evaluate it campaign to campaign.
Pricing changes frequently — check ValidTo's website for current plans.
Verification is infrastructure, not strategy — the goal is a tool you trust and stop thinking about. ValidTo has been that for us.
What matters more than which verifier you pick is that verification happens on every list, every time, with no exceptions for 'this one's probably fine.'