Here are the published million-address prices, each read on the vendor's own pricing page in September 2026. Bouncer charges $2,000 and Kickbox $2,999, and Kickbox credits expire one year from purchase. Reoon lists $960, emailverify.io $1,015 and MillionVerifier $449. Emailable lists its large tiers as custom.
A million-row export is rarely a million distinct addresses. Merged CRMs and repeat event lists carry duplicates, and ZapBounce removes them before billing, so you pay for each address once. Unknowns are the second driver: Yahoo-hosted domains and servers that greylist often return no verdict, and those rows cost you nothing.
Catch-all rows are billed at one credit each, because the extra probe is a real finding. Around 28% of a typical B2B list sits on catch-all domains, so on a B2B million, expect that share to show up as its own count in your results.
Expiry is the hidden cost on a big buy. A million credits bought to clean a list in stages only holds its value if the credits last. ZapBounce credits never expire, while Kickbox and Hunter expire theirs after 12 months.
If you verify every month rather than once, a monthly plan costs 15% less than pay-as-you-go, and unused credits roll over while the plan is active. For a one-off million, bulk verification takes your file and returns your columns with the result fields added. The full ladder is on pricing, and what verification costs per 1,000 covers smaller lists.
Related questions
How much is it per email to verify 1 million addresses?
$0.00095 a check at ZapBounce pay-as-you-go, which is $949 for 1,000,000. Unknown results and duplicates are never billed, so rows with no verdict add nothing to the bill.
Do I have to verify 1 million emails at once?
No. Buy the credits once and run the list in batches whenever you like, because ZapBounce credits never expire. A monthly plan works too, at 15% less, with unused credits rolling over while the plan is active.
Is verifying a million emails worth the cost?
For a list you plan to mail, usually yes. Mail to invalid addresses returns hard bounces on your sending domain, and at $949 a million the check costs under a tenth of a cent per address.