Listmint vs MillionVerifier: Bulk Email Verifier Compared (2026)

gavel Our verdict

Both Listmint and MillionVerifier are credible bulk email verifiers that claim 97 to 99 percent accuracy on standard mailboxes. The core difference is maturity and pricing curve. Listmint is a newer, lean, pay-as-you-go tool built for small marketers who want the cheapest entry price into email hygiene. MillionVerifier is the proven category veteran with a recurring 100-per-month free tier, wide ESP integrations, a bounce guarantee, and the lowest cost per email once you cross 100,000 verifications.

Choose Listmint if you have a one-off small list and want the lowest possible entry cost. Choose MillionVerifier if you clean lists monthly, need integrations with Mailchimp, Klaviyo, HubSpot, or ActiveCampaign, or plan to verify more than 100,000 emails per month.

If you need finding and verification bundled into a single subscription at a fraction of either tool's cost, Mailsfinder delivers 300,000 credits for $9.99 per month. That is 30x cheaper per verification than Listmint at 5K volume, and 15x cheaper than MillionVerifier at 50K volume.

$0.002

Listmint entry cost per email

$0.0005

MillionVerifier at 2M scale

$0.0000333

Mailsfinder per verification

Feature-by-feature comparison

The tools look similar on the surface but diverge on integrations, pricing curve, free tier, and the depth of their operating history. Here is how each one stacks up across 13 dimensions that actually affect bulk verification workflows.

Feature	Listmint	MillionVerifier
Core focus	Budget bulk verifier	Proven bulk verifier at scale
Recurring free plan	close Trial credits only	check_circle 100 verifications per month
Entry PAYG price	$10 5,000 emails ($0.002 each)	$19 5,000 emails ($0.0038 each)
Cheapest published tier	$299 / 250K $0.0012 per email	$999 / 2M $0.0005 per email
Claimed accuracy	97 to 99 percent	99 percent
Real-time API	check_circle	check_circle Faster documented latency
Bulk list processing	check_circle CSV upload	check_circle CSV plus native ESP sync
Catch-all handling	Flag only	Flag plus confidence score
Native ESP integrations	Zapier, webhooks	Mailchimp, Klaviyo, ActiveCampaign, HubSpot
Bounce guarantee	close No public policy	verified Credit refund on breach
G2 rating	Limited Fewer than 20 reviews	4.8 / 5 ~150 reviews
Subscription option	Pay-as-you-go only	PAYG plus monthly bundles
Best fit	Solo marketers, one-off cleanups	Agencies, ESP-native workflows, high volume

Pricing at scale: 1K to 1M verifications

The right verifier depends heavily on volume. Listmint wins the entry price race, MillionVerifier flattens the curve as you scale, and Mailsfinder collapses the entire pricing model into a flat subscription. Here is the total cost side by side.

Monthly volume	Listmint	MillionVerifier	Mailsfinder
1,000 verifications	$10 5K bundle minimum	Free 100/mo tier plus $19 topup	Free 100/day covers this
10,000 verifications	~$20 $0.002 per email	~$29 $0.0029 per email	$9.99/mo 300K credits included
100,000 verifications	~$159 $0.00159 per email	~$139 $0.00139 per email	$9.99/mo 14x cheaper than MV
500,000 verifications	~$598 Two 250K bundles	$299 $0.000598 per email	$19.98/mo 2 months of Starter
1,000,000 verifications	~$1,196 Four 250K bundles	~$499 Half of 2M plan	$249 lifetime 2M credits, one payment

Prices reflect published PAYG and subscription tiers as of June 2026. Listmint volumes above 250K require stacking bundles. MillionVerifier volumes between published tiers are interpolated from official PAYG rates.

verified What Listmint does better

check_circle Cheapest entry price on the market at $10 for 5,000 verifications, roughly half of MillionVerifier at the same tier.
check_circle Simple pay-as-you-go model with no monthly commitment. You buy credits, use them, and stop paying.
check_circle Clean, minimal interface. New users can upload a list and process it within about five minutes of signing up.
check_circle Documented real-time API for applications that need signup-form verification without a bulk workflow.
check_circle Bulk mid-tier pricing lands at $0.0012 per email, competitive against most other budget verifiers in the same range.

hub What MillionVerifier does better

check_circle Recurring 100 verifications per month free tier with no card required, one of the largest in the category.
check_circle Cheapest cost per email at high volume ($0.0005 at 2M scale), roughly half of Listmint at similar tiers.
check_circle Native integrations with Mailchimp, Klaviyo, ActiveCampaign, and HubSpot so lists can be cleaned inside the ESP.
check_circle Public bounce guarantee. If verified emails bounce above the stated threshold, affected credits are refunded.
check_circle Long, public G2 track record at 4.8 stars across roughly 150 reviews, making the accuracy claim independently verifiable.

Choose Listmint if...

arrow_rightYour list is small (under 50,000 emails per month) and you want the cheapest possible one-time cleanup.
arrow_rightYou do not want any recurring subscription and prefer buying credits only when a list needs cleaning.
arrow_rightYou export your list from your ESP as a CSV and re-import cleaned results manually. No native ESP sync is needed.
arrow_rightYou are a solo operator or a very small team and reviews are not a hard requirement for vendor selection.

Choose MillionVerifier if...

arrow_rightYou clean lists monthly and want to lock in the lowest cost per email at 100,000 or higher volumes.
arrow_rightYou want to verify lists directly inside Mailchimp, Klaviyo, ActiveCampaign, or HubSpot without a CSV round trip.
arrow_rightYou need a written bounce guarantee to protect against downside risk on client contracts.
arrow_rightYou want a large, public G2 review base to independently verify accuracy claims before committing.
arrow_rightYou want a recurring free tier that always resets, useful for testing new integrations without spending credits.

savings 15 to 30x cheaper at scale

The low-cost alternative: Mailsfinder

Listmint and MillionVerifier are both good tools, but they only do half the job. Both are verification-only. If you also need to find new emails to verify, you are still paying a separate finder tool on top. That doubles your cost stack.

Mailsfinder collapses finding and verification into a single subscription. $9.99 per month gets you 300,000 credits that work for either action. At that rate, one verification costs $0.0000333. That is 30x cheaper than Listmint at 5K volume and 15x cheaper than MillionVerifier at 50K volume. If you outgrow the monthly plan, the $249 lifetime tier gives you 2,000,000 credits with no recurring fee.

The trade-off is honest. Mailsfinder does not offer native ESP sync into Mailchimp or Klaviyo yet. If you clean lists inside your ESP without export, MillionVerifier stays the better fit. If your workflow is API-first or CSV based, Mailsfinder is the cheapest full-stack option available.

Metric	Listmint	MillionVerifier	Mailsfinder
Cost per verification	$0.002	$0.0038 entry	$0.0000333
Credits at $9.99/mo	~5,000 one-time	Free tier only	300,000
Recurring free tier	Trial only	100 per month	100 per day (3,000/mo)
Finder bundled	close	close	check_circle Yes
Lifetime option	close	close	$249 for 2M credits

alternate_email

Mailsfinder Starter

$9.99 / month

300,000 credits included, finder plus verifier bundled

check_circle 99 percent verification accuracy
check_circle Real-time API for signup verification
check_circle Bulk CSV upload with duplicate removal
check_circle 100 free credits daily, no card needed
check_circle $249 lifetime plan for 2,000,000 credits

Try Mailsfinder free Talk to Sales

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Our evaluation methodology

Every comparison on Mailsfinder is built on the same six-criterion framework. We do not rank on marketing claims. Every metric below is triangulated from published pricing, third-party reviews, and community reports.

database

Result depth

We test the granularity of each verifier's response schema: does it return just valid or invalid, or does it also flag catch-all, role, disposable, and confidence scores that inform suppression logic.

speed

Processing throughput

We benchmark real-time API latency and bulk list throughput at 10K, 100K, and 500K rows to see how each tool holds up when a campaign deadline is on the line.

paid

Effective cost per email

We calculate the true cost per valid email across every published tier, including any hidden charges, minimum bundle sizes, and per-seat fees that inflate the on-paper price.

hub

Native integrations

We map every native connector into ESPs (Mailchimp, Klaviyo, ActiveCampaign, HubSpot) and workflow tools (Zapier, webhooks) so teams know if a CSV round trip is avoidable.

reviews

Cross-source reviews

We cross-reference G2, Capterra, and Reddit threads to find themes that vendor marketing pages hide, especially around real bounce rates, refund practices, and support quality.

verified_user

Guarantees and compliance

We check for written bounce guarantees, GDPR posture, data retention windows, and refund terms. These are the details that matter when the tool is part of a client contract.

Frequently asked questions

Is Listmint or MillionVerifier more accurate? expand_more

Both tools claim similar accuracy in the 97 to 99 percent range for standard mailboxes. MillionVerifier has a much longer public review history (roughly 150 G2 reviews at 4.8 stars) and reports lower catch-all false positives in Reddit threads. Listmint is newer and has fewer than 20 G2 reviews, so its accuracy claim is harder to independently verify. If you need audit-ready results with a proven track record, MillionVerifier is the safer default. For low-stakes cleanup where price matters most, Listmint holds up.

Which is cheaper, Listmint or MillionVerifier? expand_more

It depends on volume. Listmint is cheaper at small entry volumes (5,000 verifications for $10, or $0.002 per email). MillionVerifier costs $19 for the same 5,000 tier ($0.0038 per email). But at higher volumes MillionVerifier becomes dramatically cheaper: 500,000 verifications cost $299 with MillionVerifier ($0.000598 per email) versus roughly $598 for two Listmint 250K bundles ($0.0012 per email). Above 250K verifications per month, MillionVerifier consistently wins on price.

Does MillionVerifier have a free plan? expand_more

Yes. MillionVerifier offers 100 free verifications every month with no card required and no expiration. This is one of the most generous free tiers in the verifier category. Listmint does not publish a recurring free tier, though it sometimes offers a trial batch on signup. Mailsfinder offers 100 free credits per day (roughly 3,000 per month) that cover both email finding and verification.

Can I use Listmint or MillionVerifier for real-time API verification? expand_more

Yes to both. Listmint offers a real-time verification API with documented endpoints. MillionVerifier also supports real-time single verification through its API plus bulk upload endpoints for list cleaning. MillionVerifier tends to have faster documented response times, and its integration library is broader. If your product needs sub-second verification at signup, both work, but MillionVerifier has the longer production track record.

Which one integrates better with ESPs and CRMs? expand_more

MillionVerifier has native integrations with Mailchimp, Klaviyo, ActiveCampaign, HubSpot, and several other major platforms, letting you clean lists inside the tool where they live. Listmint is newer and its integration library is smaller, though it does offer Zapier and webhook support. For teams that clean lists inside an ESP without exporting CSVs, MillionVerifier is the more complete option today.

Are catch-all domains handled by both tools? expand_more

Both tools return a specific status for catch-all domains rather than a false valid or invalid verdict. MillionVerifier is well known for a strict catch-all classification and pairs it with a confidence score. Listmint returns a catch-all flag but community feedback on its scoring depth is limited. For senders in compliance-heavy verticals where every soft bounce matters, MillionVerifier gives more granular signals to build suppression logic against.

Is Listmint a good choice for very small lists? expand_more

Yes. If your list is a few thousand contacts and you want a one-time cleanup without a subscription, Listmint at $10 for 5,000 verifications is one of the cheapest entry prices on the market. You pay once, use the credits, and move on. The trade-off is limited independent reviews and a shorter operating history. For occasional cleanup of a small SMB list, that trade-off is usually acceptable.

Is there a cheaper alternative that bundles email finding as well? expand_more

Yes. Mailsfinder charges $9.99 per month for 300,000 credits that cover both email finding and verification. That works out to $0.0000333 per verification, roughly 30x cheaper than Listmint at 5K volume and 15x cheaper than MillionVerifier at 50K volume. You also get 100 free credits daily. Listmint and MillionVerifier are verification-only, so if you also need to find new emails you would pay a separate finder tool on top. Mailsfinder collapses that into a single subscription.

Does either tool offer a bounce guarantee? expand_more

MillionVerifier offers a public bounce guarantee: if verified emails bounce at higher than a stated threshold, they refund the affected credits. Listmint does not publish a formal bounce refund policy, though customer support may address individual complaints case by case. For teams where deliverability is a contractual obligation to their own clients, a written bounce guarantee reduces downside risk and pushes the decision toward MillionVerifier.

Listmint vs MillionVerifier: which bulk verifier wins in 2026?