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MillionVerifier vs Warmy: Email Platforms Compared (2026)

By the Warmy deliverability team Updated

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real warmup mailboxes
1M+
real warmup mailboxes
US seed accounts
500K+
US seed accounts
per month, billed monthly
$49
per month, billed monthly
human support
24/7
human support

Warmy brings Adeline AI, personalized warm-up, real link clicks, inbox placement testing, verification and reputation monitoring together in one all-in-one deliverability platform.

MillionVerifier provides bulk list verification, a real-time and bulk API, and EverClean for automated cleaning inside connected email platforms.

Key takeaways

MillionVerifier vs Warmy at a glance

What MillionVerifier does
MillionVerifier provides bulk list verification, a real-time and bulk API, and EverClean for automated cleaning inside connected email platforms.
Best-fit workflow
Marketers maintaining ESP audiences and developers embedding verification or operating repeated list-cleaning jobs.
MillionVerifier pricing
EverClean documentation describes a monthly subscription whose price changes with list size and a free allowance below 1,000 emails. Current paid cash amounts, currency and bulk-credit rates were not independently verified; obtain the calculator quote.
Warmy pricing
Plans starting from $49 / month. Seven-day trial, no credit card required.
Key strength
EverClean exposes explicit result and unsubscribe/delete choices.
Important trade-off
Automatic deletion needs governance and a recovery plan.

Good to knowWarmy goes beyond a single email tool: Adeline AI, warm-up, testing, monitoring and verification work together to improve your deliverability.

Warmy vs MillionVerifier, Side by Side

Warmy brings ongoing optimization, actionable intelligence and deliverability measurement into one platform. See how that broader coverage compares with the specialist capabilities below.

Primary focus
WarmyAll-in-one, self-serve email deliverability infrastructure
MillionVerifierMillionVerifier provides bulk list verification, a real-time and bulk API, and EverClean for automated cleaning inside connected email platforms.
Best-fit audience
WarmyTeams improving and measuring sender reputation across their existing sending stack.
MillionVerifierMarketers maintaining ESP audiences and developers embedding verification or operating repeated list-cleaning jobs.
File imports
WarmyWarmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature.
MillionVerifierHomepage lists CSV, TXT and XLSX.
Single checking
WarmyWarmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature.
MillionVerifierHomepage provides an individual email-checker workflow.
Disposable detection
WarmyBuilt-in
MillionVerifierTemporary and role-based addresses are described as detected.
Real-time API
WarmyDocumented API included on every plan
MillionVerifierSingle API handles signup-time verification.
Bulk API
WarmyDocumented API included on every plan
MillionVerifierSeparate bulk API supports programmatic file verification.
API-key authentication
WarmyDocumented API included on every plan
MillionVerifierRequests identify the account using an API key.
Test keys
WarmyWarmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature.
MillionVerifierDocumentation offers deterministic-result and random-response development keys.
Multiple API keys
WarmyDocumented API included on every plan
MillionVerifierService page allows unlimited API keys with comments.
Key controls
WarmyWarmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature.
MillionVerifierKeys can be enabled or disabled and IP restrictions configured.
ESP import
WarmyWarmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature.
MillionVerifierIntegrations import selected ESP lists for verification.
Named connectors
WarmyWarmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature.
MillionVerifierLists Mailchimp, HubSpot, ActiveCampaign, MailerLite and other providers.
EverClean schedule
Warmy1M+ real, protected Google Workspace, Microsoft 365, and B2C mailboxes
MillionVerifierHubSpot help supports daily or weekly cleaning.
Result selection
WarmyWarmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature.
MillionVerifierEverClean lets the user select results that trigger action.
Removal actions
WarmyWarmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature.
MillionVerifierEverClean supports unsubscribe or delete actions.
Pricing and billing
WarmyFrom $49/month, billed monthly
MillionVerifierEverClean documentation describes a monthly subscription whose price changes with list size and a free allowance below 1,000 emails. Current paid cash amounts, currency and bulk-credit rates were not independently verified; obtain the calculator quote. Bulk verification purchase terms unverified; EverClean recurring list-size subscription
Trial and free access
WarmySeven days, no credit card required
MillionVerifierHomepage offers 100 free credits without a credit card.

The detailed analysis

Where Warmy Adds Value Beyond MillionVerifier

Marketers maintaining ESP audiences and developers embedding verification or operating repeated list-cleaning jobs.

01

EverClean controls actions, not just scores

The HubSpot setup page asks users to connect the platform, select lists and choose the result categories that should trigger an action. It distinguishes unsubscribing from deleting and recommends acting on Bad emails only, specifically invalid and disposable results.

Test this on a limited list before applying it across a CRM. Deletion and suppression have different data-retention and recovery implications, so the result policy should be approved by the data owner rather than inherited blindly from a generic cleaning preset.

02

Recurring hygiene has a list-size bill

EverClean’s setup page says the subscription is paid monthly and can change with the number of emails in the list. It states that lists below 1,000 emails are free and sends users to the calculator for other prices.

A subscription to keep a connected audience clean is not economically equivalent to a one-time batch check. Forecast list growth and review the generated quote before enabling recurring cleaning; paid cash rates and currency were not independently established in this research.

03

API testing supports known outcomes

The developer documentation offers a random-response test key and keys for specific outcomes including OK, catch-all, invalid, unknown and disposable, plus error conditions. Single and bulk APIs use separate base URLs.

This supports deterministic integration tests for retry, suppression and insufficient-credit branches. A test result must never be persisted as a real verification decision; isolate development keys and ensure production processing calls the appropriate single or bulk endpoint.

04

Key management supports separate applications

The API service page says users may create multiple keys, comment on them, switch them on or off and apply IP allow/deny restrictions. Requests use the key and email address for authentication and checking.

Give distinct applications separate keys so revoking one integration does not unnecessarily interrupt another. IP restrictions should match real deployment egress, and keys should be held server-side; advertised key controls do not eliminate the need to handle secrets and query logging carefully.

05

Cadence requires connector-level confirmation

The homepage describes daily EverClean operation, while the HubSpot help explicitly offers daily or weekly periods. The list-verification page describes connecting with the ESP key and importing a selected list before running verification.

Use the connector’s actual configuration as the operational authority rather than assuming every integration has the same cadence. Confirm supported result actions and account permissions in the chosen ESP; integration counts in marketing copy are less important than a tested end-to-end removal workflow.

06

A concrete evaluation against Warmy

A HubSpot administrator schedules weekly cleaning and unsubscribes invalid entries. EverClean exposes explicit result and unsubscribe/delete choices.

Automatic deletion needs governance and a recovery plan. Compare that specialist result separately from Warmy’s provider-level placement baseline and reputation work. Neither a successful verification nor an API response alone establishes delivery to every subscriber inbox.

The Warmy advantage

One Platform. Your Entire Deliverability Workflow.

From Adeline’s next-step guidance to real engagement and provider-level measurement, Warmy connects the work that separate email tools leave to your team.

Adeline AI deliverability expert

Adeline connects authentication, DNS, inbox placement, blocklists, content, engagement and provider signals into one picture. She builds personalized deliverability plans, detects spam risk and explains what to change next.

AI-powered email warm-up

Personalized timing, volume and pacing, with gradual ramp-up and engagement that includes opens, replies, important markings and moving messages out of spam.

Real link clicks

Warmy’s engagement includes real clicks on your links, alongside opens and other natural mailbox interactions.

1M+ real mailbox network

1M+ real, protected Google Workspace, Microsoft 365, and B2C mailboxes

500,000+ US seed accounts

500,000+ real US seed accounts, desktop and mobile; rotated monthly; speeds up warmup

Inbox placement and automated tests

Included: 5–50 tests/month by tier, with automated testing. Provider-level results distinguish inbox, Promotions and spam, so you can measure progress instead of relying on SMTP acceptance alone.

Reputation and blacklist monitoring

Domain/IP reputation tracking, blacklist alerts, spam-placement reports

SPF, DKIM and DMARC

SPF, DKIM, and DMARC tracking, record checks, and DMARC report analysis

Google Postmaster integration

Direct Google Postmaster integration

Built-in email verification

Check address validity as part of the wider deliverability workflow, alongside reputation work, placement testing and monitoring.

AI content optimization

AI template optimization, custom warm-up topics and templates, and conversations in 30+ languages.

Multiple mailboxes and domains

Multiple mailboxes and domains; 100 to 5,000 warmup emails/day by plan. Auto-archive keeps warm-up conversations out of your working inbox.

Your existing sending stack

Klaviyo, Mailchimp, HubSpot, SendGrid, ActiveCampaign, Google Workspace, Microsoft 365, and SMTP. Self-serve setup in minutes via OAuth or SMTP/IMAP.

API and expert support

Documented API included on every plan. 24/7 human support; dedicated CSM and deliverability consultant on Expert/Platinum.

Allowances and dedicated support vary by plan. Plans starting from $49 / month.

Plans and total cost

Warmy vs MillionVerifier Pricing

Warmy and MillionVerifier pricing compared
Pricing detailWarmyMillionVerifier
Starting price$49/ monthEverClean documentation describes a monthly subscription whose price changes with list size and a free allowance below 1,000 emails. Current paid cash amounts, currency and bulk-credit rates were not independently verified; obtain the calculator quote.
BillingMonthlyBulk verification purchase terms unverified; EverClean recurring list-size subscription
Free trialSeven days, no credit card requiredHomepage offers 100 free credits without a credit card.
Also includedAdeline AI, warm-up, placement tests, monitoring, verification and API access; allowances vary by plan.See the individual features and published plan allowances below.

Plans starting from $49 / month. See Warmy’s five plans

MillionVerifier: published plans and allowances

EverClean below 1,000 emails
Freeconnected list below 1,000 emails · monthly service
Stated in HubSpot setup help; confirm eligibility.
EverClean paid
Unverifiedbased on list size · monthly
Calculator quote required; currency unverified.
Bulk verification
Unverifiedverification credits · purchase billing unverified
No third-party price claims used.

A mailbox subscription, an address-verification credit, a rendering test and an SMTP sending allowance buy different outcomes. Compare total cost using your own mailbox count, list size, testing frequency and sending volume; do not equate a lower unit price with equivalent coverage.

Social proof

What Senders Are Saying about Warmy

Rated 4.9/5 on G2 and trusted by 35,000+ businesses.

TESTIMONIALS

Loved by senders who live in the inbox

★★★★★5.0
“Warmy has been a game changer for us. The platform pays for itself many times over.”
Darren Prine
Co-founder and CRO, Cloud Tech Gurus
★★★★★5.0
“If you do cold email, Warmy will increase your efficiency, improve your deliverability, and cut your costs.”
Thomas TzouridisThomas Tzouridis
CEO, ActiScale
★★★★★5.0
“I've purchased many marketing tools before. Often, once you buy, you're on your own. With Warmy, they care about you.”
Gábor Majer
Founder, Nord Sales Company

The verdict

Why Choose Warmy for Complete Deliverability

Which tool to choose for each need
If you want…Choose
Everything in one platformWarm-up, placement tests, verification, authentication and reputation monitoring in one connected workflow.Warmy
Adeline AI expertisePersonalized plans, predictive spam-risk detection and clear next steps from your AI deliverability expert.Warmy
Real engagement and seed accountsA 1M+ mailbox network, real link clicks and 500,000+ US seed accounts.Warmy
Expert help and an easy startSelf-serve setup, API access and 24/7 human support; dedicated consultant options on higher tiers.Warmy
A HubSpot administrator schedules weekly cleaning and unsubscribes invalid entries.MillionVerifier
A SaaS team tests invalid/disposable/error signup branches with development keys.MillionVerifier
A marketer imports a connected ESP list for a one-time cleaning.MillionVerifier

MillionVerifier: specialist capabilities

  • EverClean exposes explicit result and unsubscribe/delete choices.
  • Developer test keys cover outcomes and errors.
  • Key comments, revocation and IP restrictions aid operations.

Trade-offs to evaluate

  • Automatic deletion needs governance and a recovery plan.
  • Current paid numeric rates and currency remain unverified.
  • Daily homepage wording should not override connector-specific cadence settings.

A practical evaluation

Using Warmy Alongside MillionVerifier

  1. 1

    Define the job for MillionVerifier

    A HubSpot administrator schedules weekly cleaning and unsubscribes invalid entries. Keep that objective separate from your sender-reputation and placement baseline.

  2. 2

    Establish a placement baseline

    Test a representative message with a consistent provider mix. Record authentication, inbox and spam placement before changing the sending workflow.

  3. 3

    Evaluate MillionVerifier against its output

    Test this on a limited list before applying it across a CRM. Deletion and suppression have different data-retention and recovery implications, so the result policy should be approved by the data owner rather than inherited blindly from a generic cleaning preset.

  4. 4

    Coordinate complementary work

    Automatic deletion needs governance and a recovery plan. Keep specialist tooling where it serves a separate job. Coordinate any overlapping warm-up schedules instead of doubling engagement volume.

  5. 5

    Review before scaling

    Compare provider-level placement alongside specialist results, bounces and complaints. Address validity, rendering previews and SMTP acceptance alone do not prove inbox placement.

FAQ

Warmy vs MillionVerifier
FAQs

MillionVerifier provides bulk list verification, a real-time and bulk API, and EverClean for automated cleaning inside connected email platforms. Warmy focuses on sender reputation, inbox-placement testing and authentication monitoring alongside the existing sending stack.

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