MillionVerifier

What it is

MillionVerifier is a pay-as-you-go email verification service. You upload a list or call the API, and each address comes back as ok, catch-all, unknown, invalid or disposable. There is no subscription: you buy a pack of credits, and paid credits never expire. It sits in the same category as ZeroBounce and NeverBounce, but it competes on price, not on extra features. There is no scoring model, no inbox placement testing and no blacklist monitoring.

Ownership changed in 2026. The Terms of Service published on 19 October 2026 name Southern Vector Limited, a New Zealand company, as the provider. Southern Vector bought the MillionVerifier business assets from GBD Software as a Service, the Hungarian company that ran it before. The terms say the new owner took over valid unused credits and the credit ledger, and that a transfer cannot cancel, expire or reduce them. The help center’s policy-update log does not mention the sale, so most customers will only find out by reading the terms.

The question this page answers: is MillionVerifier still the cheap first pass before Smartlead or Instantly, and does the new owner change that? Our answer: yes for the credits, which are protected in writing. Your data terms need a second look before your next large upload.

Why it shows up in RevOps stacks

• It is the cheapest serious bulk verifier. 50,000 checks cost $89 ($0.00178 each), and 1 million cost $449. Cold-email teams use it as the bulk pass that removes clearly invalid addresses before anything more expensive runs.
• Catch-alls cost nothing unless they resolve. MillionVerifier says its catch-all engine turns 30% to 40% of catch-all addresses into valid or invalid at one standard credit. Catch-all and unknown results it can’t resolve are not charged.
• It connects to where lists go. The site lists 40 integrations, including HubSpot, Pipedrive, Mailchimp and Smartlead (connected with your Smartlead API key). There is a single-address and a bulk REST API, with test keys that force each result type. Zapier, Clay and Instantly are not on its integration list, so for those you verify by CSV or API before upload.

Pricing reality

The homepage confirms two prices: 50,000 credits for $89 and 1 million for $449. Packs go from 10,000 to 50 million, with volume pricing above that, and the site says plans start at $39. New accounts get 100 free credits with no card. Switching on Auto Top-Up adds 10% extra credits to each payment, and every 5 million credits bought earns 1 million free.

Because credits never expire, the tier you buy matters more than the list price. A team verifying 50,000 new addresses a month pays $1,068 a year buying the $89 pack each month. Buying the 1 million pack covers 20 months for $449, or about $270 a year. ZeroBounce’s ONE subscription at the same volume costs roughly $4,500 a year.

Best for

Outbound and RevOps leads at B2B teams verifying 20,000 to 1 million addresses a month from Apollo, Clay or scraped sources, where most domains are not catch-alls and the job is to remove invalid addresses at the lowest cost. It also works for agencies reselling verification, which its API docs explicitly allow.

Don’t buy it as your only verifier if catch-all domains are more than about 15% of your list, if a bounce has already burned a sending domain, or if security review needs a SOC 2 report. We found no SOC 2 attestation published by MillionVerifier, so ask for one before procurement starts.

Versus the alternatives

ZeroBounce is the market leader. It scores catch-alls from 0 to 10, holds SOC 2 Type 2 and sells deliverability tools. Pick it when catch-alls are a large share of your list, or run it as a second pass on only the catch-all and unknown results MillionVerifier returns. That keeps ZeroBounce volume to a fraction of the list.

NeverBounce, now owned by ZoomInfo, is the other long-established verifier, at about $8 per 1,000 with credits that expire after 12 months. Pick it only if you already run its CRM sync.

Built-in sequencer verification is the fastest-growing option. Instantly verifies at 0.25 credits per lead and Smartlead sells an add-on at upload. Pick it below about 5,000 new contacts a month, where one less vendor matters more than price.

If none of them fit, the problem is the list source. Fix sourcing with waterfall enrichment, then place the verifier where the cold email infrastructure stack shows it.

Watch-outs

• Your data processor may have changed. The August 2026 privacy policy and DPA named GBD as controller and processor, and the new governing law is New Zealand’s. New Zealand has an EU adequacy decision, but your DPA should name the company that now holds the data. Guard: before the next large upload, ask support for a DPA signed by Southern Vector Limited and check the subprocessors page; until you have it, upload only business addresses you would be comfortable disclosing in a breach notice.
• Catch-all claims are unproven. The 30% to 40% resolution rate is the vendor’s. Prospeo, a competitor, reports MillionVerifier resolving only 5% of catch-alls, and Instantly’s 2026 benchmark notes weaker catch-all detection and problems with Yahoo addresses. Guard: send a 2,000-address sample from your own sources and compare hard bounces on catch-alls marked valid against the same sample run through ZeroBounce.
• Free risky results are not guaranteed. The terms call the no-charge rule for unknown and catch-all results a discretionary goodwill programme, not a permanent feature. Guard: budget every address at full price, so a policy change does not break your cost model.
• The money-back guarantee starts too late. It refunds your last payment only if more than 4% of addresses marked ok hard-bounce, you emailed them within 7 days, and you verified by file upload. Inbox providers flag senders at around 2%. Guard: treat the guarantee as a refund, not as protection, and send new lists from a secondary domain first. Email deliverability for cold outreach covers the threshold.