MailerCheck

What MailerCheck does

MailerCheck, Inc. is a private B2B SaaS company headquartered in New York (228 Park Ave S, PMB 10003) that provides email list verification and deliverability testing services. The company operates an email verification platform with five primary modules: bulk Email List Verification, Email Insights (content and authentication analysis), Inbox Placement (predictive testing against Gmail, Yahoo, Outlook, AOL, Zoho, GMX, ProtonMail, and Mail.com), Real-time API Verification for point-of-collection validation, and Usage Reports for analytics. Underlying technology combines SMTP-level verification, content heuristics for spam-word and HTML/authentication issue detection, and inbox-placement seed testing against major mailbox providers. The company reports 254,456 customers worldwide and claims 12+ years of email deliverability expertise, with processing speeds of approximately one minute per verification versus roughly 20 minutes for at least one named competitor.

The business model is a pure usage-based credit system with no monthly subscriptions. Pricing scales from $0.01 per credit (1,000 credits for $10) down to $0.002 per credit (1,000,000 credits for $2,000), with a 10-credit freemium entry point. Email Insights and Inbox Placement each consume 200 credits per use. Go-to-market is product-led and self-serve, supplemented by native integrations with five email marketing platforms (MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit) and automation connectors (Zapier, Make). Distribution is anchored by a strategic partnership with MailerLite, where MailerCheck serves as the preferred email verification provider for MailerLite's nearly one million customers, with shared SSO and MailerLite-handled support. Customer segments are horizontal, spanning email marketers, SMBs and mid-market businesses, SaaS companies, and developers integrating the verification API. The company is GDPR- and CCPA-compliant with EU-based ISO 27001 and ISO 20000-certified data storage.

In May 2026, MailerCheck announced the sunset of its DMARC and Blocklist Monitoring features, redirecting users to MailerSend for those capabilities, indicating portfolio consolidation rather than expansion. The firm has no disclosed funding rounds, parent company, or headcount in the available data, and it is treated here as an independent private company, though the MailerLite integration strongly suggests affiliation with the broader MailerLite/Rocket.net corporate group.

Name

MailerCheck

Legal name

MailerCheck, Inc.

Website

https://mailercheck.com

Company type

Private

Operating status

Operating

Short description

MailerCheck is a B2B SaaS platform that provides email list verification, content deliverability analysis, inbox placement testing, and real-time verification APIs for SMBs, mid-market businesses, and SaaS developers, operating on a usage-based credit pricing model with self-serve onboarding.

Ownership category

akta.pro rank

Product category

Email Verification and Deliverability Software

NAICS

Directory and Mailing List Publishers (51314)

SIC

Services-Prepackaged Software (7372), Services-Computer Processing & Data Preparation (7374)

akta.pro industry

PRIMARYHDADAKAC

Email Authentication & Domain Protection (DMARC/SPF/DKIM)

Hardware, Technology & Telecom/Cybersecurity/Email & Collaboration Security

SECONDARYBPAFAKAB

Email Marketing Services (Campaigns, Deliverability, Lifecycle)

Business & Public Services/Marketing, Advertising & PR Services/Direct Marketing & Lead Generation (Email, Telemarketing, Demand Gen)

Keywords

• Email list verification
• Email deliverability testing
• Inbox placement testing
• Email validation API
• Email content analysis

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Infrastructure, Personnel, Marketing or Sales, Operations

Revenue model

1. Credit-based Usage: Pay-per-verification model where customers purchase credits. Each email verification costs 1 credit. No monthly subscriptions or long-term commitments required. Credits can be purchased in various quantities with volume discounts.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels6 records

Core offering

MailerCheck is a SaaS platform that verifies email lists and tests email deliverability. It validates individual and bulk email addresses to identify invalid, risky, catch-all, role-based, disposable, and typo emails, and analyzes email content (spam words, broken links, HTML errors, SPF/DKIM authentication) to predict inbox placement across major mailbox providers including Gmail, Yahoo, AOL, Zoho, Outlook, GMX, ProtonMail, and Mail.com. The service is delivered through a self-serve web app and a RESTful API for real-time verification at point of collection.

Product overview

MailerCheck is a B2B SaaS email deliverability platform that provides an all-in-one solution for email list verification and campaign optimization. The core product is Email List Verification, which validates individual and bulk email addresses through a 3-step process. Additional modules include Email Insights (content analysis for spam detection and HTML validation), Inbox Placement (testing against 8 major mailbox providers), Real-time API Verification (for point-of-collection validation), and Usage Reports (analytics and recommendations). The platform is designed to work with email marketing platforms through native integrations with MailerLite, Mailchimp, ActiveCampaign, GetResponse, and ConvertKit, as well as automation tools Zapier and Make.

Differentiator

Problem solved

Functional benefit

Products and services

• Email List Verification Core product that validates email addresses individually or in bulk, supporting single address verification, bulk list upload, and real-time API verification. Detects invalid emails, catch-all addresses, disposable emails, role-based emails, syntax errors, typos, and full mailboxes, with a guaranteed 98%+ delivery rate on verified lists.
• Email Insights Email content analysis tool that tests deliverability before sending by scanning for spam words, broken links, missing images, HTML errors, and validating SPF/DKIM authentication records. Checks IP blocklist entries and provides recommendations to avoid spam folders.
• Inbox Placement Deliverability testing tool that predicts whether emails will reach the inbox or spam folder. Tests against 8 major mailbox providers including Gmail, Yahoo, AOL, Zoho, Outlook, GMX, ProtonMail, and Mail.com, and indicates whether emails land in Gmail's Promotions tab.
• Real-time API Verification RESTful API that validates new email addresses at the point of collection in real time. Integrates with registration forms and applications to instantly filter out invalid emails, typos, catch-all domains, and disposable addresses before they enter a list.
• Usage Reports

Quantifiable outcome

• Guaranteed 98%+ email delivery rate with verified lists
• +2 more outcomes

Named customers1 record

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration7 records

AI capability4 records

Feature5 records

Partnerships

Six partnerships are on record, tiered core and minor.

• MailerLitecoreTechnology or IntegrationPreferred email marketing partner and integration. MailerCheck is the preferred email verification partner for MailerLite's nearly 1 million customers. Deep integration with single sign-on (SSO) connection available. Partners listed in MailerLite Expert directory. MailerLite provides customer support services for MailerCheck clients.
• MailchimpcoreTechnology or IntegrationIntegration partner allowing users to import and export email lists directly from Mailchimp for verification.
• ActiveCampaigncoreTechnology or IntegrationIntegration partner enabling direct list import/export between ActiveCampaign and MailerCheck.
• GetResponsecoreTechnology or IntegrationIntegration partner for seamless email list verification workflow with GetResponse users.
• ConvertKitcoreTechnology or IntegrationIntegration partner enabling ConvertKit users to verify email lists directly through MailerCheck.
• StripeminorOthersThird-party payment processor for credit card transactions. MailerCheck does not process or store credit card information.

Scale indicators5 records

Recent moves5 records

Expansion highlights5 records

Emerging players

• MXToolbox: MXToolbox delivers DNS, blacklist, and email diagnostics including DMARC/SPF/DKIM checks, overlapping MailerCheck's Email Insights authentication and blocklist features.
• GlockApps (Validity): GlockApps focuses on inbox placement, spam testing, and DMARC/Blocklist monitoring - the deliverability-testing capabilities MailerCheck is sunsetting, making it both a partial peer and a MailerSend-recommended alternative.

Direct peers

• ZeroBounce: ZeroBounce is a direct competitor offering bulk and real-time email verification, deliverability testing, and email scoring - the same core use cases as MailerCheck for B2B marketers and SMBs.
• NeverBounce: NeverBounce provides real-time and bulk email list verification with API access for marketers, directly competing with MailerCheck's verification pricing, integrations, and accuracy claims.
• BriteVerify: BriteVerify (now part of Validity) is an enterprise-grade email verification service with bulk and real-time capabilities, frequently compared head-to-head with MailerCheck for list cleaning accuracy.
• Kickbox: Kickbox delivers email verification and deliverability tools via API and platform, serving the same SMB and mid-market email marketers as MailerCheck.
• Hunter.io: Hunter.io offers an email verifier API alongside its prospecting tools, competing with MailerCheck for developer and outbound-focused customers needing per-address validation.
• Emailable: Emailable provides bulk and real-time email verification with API and integrations, directly comparable to MailerCheck's pricing tiers and accuracy-focused positioning.
• Snov.io: Snov.io combines email verification with lead generation and outreach tools, overlapping MailerCheck's verification product for B2B sales and marketing teams.
• EmailListVerify: EmailListVerify offers bulk and API email verification with catch-all, disposable, and role-based detection - a near feature-for-feature alternative to MailerCheck at similar price points.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/mailercheck

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about MailerCheck