MillionVerifier review

MillionVerifier checks email addresses one at a time, in uploaded lists, or through an API for signup forms. It labels results as good, risky, or bad. For list cleaning, it accepts CSV, TXT, and XLSX files and says it returns a cleaned list in minutes; its product description also says it can handle lists of millions of addresses.

The company claims 99%+ accuracy and offers a refund for emails it cannot verify with certainty. That is a vendor claim, not independent evidence of accuracy. Core verification is sold through one-time credit packs rather than a monthly plan. According to the published pricing information, 10,000 credits cost $39 and never expire. Larger pack prices are not published. EverClean is a separate recurring service that monitors contacts in Mailchimp, HubSpot, or ActiveCampaign; its price and limits are not published.

The clearest advantage is the pay-as-you-go model: the listed 10,000-credit pack costs $39 once, has no recurring billing, and does not expire. That suits teams cleaning a list occasionally better than a subscription that keeps charging between jobs. There is also a free single-address checker for support or sales use, though that is not the same as a free plan for bulk verification.

The service covers several workflows: file uploads, individual checks, bulk processing, and a REST API for real-time signup verification. The product describes the API as low-latency with generous rate limits, but it does not publish a numeric request cap in the published pricing details. EverClean may appeal to teams that want new contacts checked continuously in supported ESPs rather than scheduling one-off cleanups; its price and account limits are not listed.

A Reddit thread called MillionVerifier’s pricing competitive, and one commenter said it was among the options they were comparing for price and API speed. That same commenter said EmailListVerify was ahead on personal experience, so treat the discussion as a lead to investigate, not a quality verdict.

The main buying problem is price visibility. The published pricing information lists just one core pack—10,000 credits for $39—and says larger packs cost more without publishing their tiers. That makes it hard to calculate unit costs for regular bulk work or compare MillionVerifier fairly with alternatives before committing. A Reddit user processing 100,000 addresses a week said their MillionVerifier costs had risen sharply, though the post gives no bill or per-email rate to verify the scale of that increase.

The limits are also thinly documented here. Exact API rate limits, larger credit-pack sizes, and EverClean’s price and contact caps are not published. The free single-email checker does not establish that bulk use is free, and the listed pricing says there is no free plan. Finally, the 99%+ accuracy figure is a company claim; the published material does not provide independent accuracy results. The refund promise is useful in principle, but the qualifying rules and refund process are not specified.

MillionVerifier’s core verification runs on one-time credit purchases, not a monthly or annual plan. According to the published pricing details, 10,000 credits cost $39, and the credits never expire. That works out to $3.90 per 1,000 credits at this pack’s price; it is not a published rate for larger purchases.

Larger pay-as-you-go packs are available, but their exact prices and credit amounts are not published, so we can’t compare the tier jump or say when bulk buying lowers the unit cost. Check the current checkout price against your list size before committing.

EverClean is a separate recurring subscription for ongoing list monitoring. Its price and limits are not published, so you’ll need a quote or current plan details to calculate the ongoing cost. The pricing details list no free plan. The main billing distinction is simple: credits are a one-time purchase with no expiry, while EverClean recurs. Don’t treat the $39 pack as the price for continuous monitoring.

Switching starts with your list or signup flow. MillionVerifier accepts CSV, TXT, or XLSX uploads and returns a cleaned list; its REST API is another route for verifying addresses at signup. The service also describes EverClean connections for Mailchimp, HubSpot, and ActiveCampaign. The published details don’t specify migration tools, export formats for results, or how existing suppression and risk labels transfer, so confirm those points before moving a live workflow.

Credits don’t expire, which avoids a subscription deadline for occasional cleaning. But EverClean is a separate recurring product, and its price and limits are not published. That makes the cost of moving ongoing monitoring harder to assess.

We don’t have Reddit posts or comments in the published material, so we can’t substantiate a common reason users leave MillionVerifier. Before switching away, check whether you can retrieve the cleaned list and preserve any decisions your ESP relies on. The available details don’t document account-level data export or a cancellation process.