What TowerData does

TowerData, operating commercially as AtData, is a privately held email address intelligence company founded around 2000-2001 and headquartered in Fairport, New York. The company maintains a proprietary database of 2.4 billion email identity linkages enriched with 25+ years of historical email activity and 150+ monthly behavioral signals per address, achieving 98% profile coverage across 80+ verified signals per record. Its platform spans four functional pillars: email validation (SafeToSend, List Guard), identity matching (Alternate Email, Email Append, Postal Append, Website Visitor ID), consumer insights and data enrichment (Demographics, Quality Score, Email Opener Data), and fraud prevention (SafeToTrust, Risk Scoring, Identity Correlation & Anomalies, Phone Validation, Platform Tumbling Check).

The core technology stack is built around machine learning models trained specifically on email activity data, applied to deliverability prediction, fraud risk scoring, and identity resolution. The platform is accessed via a public REST API (documented at docs.atdata.com), a self-serve portal (InstantData) with a free trial entry point, and 18+ pre-built integrations into marketing automation, CRM, and data warehouse platforms including Salesforce, HubSpot, Marketo, Snowflake, Klaviyo, MailChimp, ActiveCampaign, Iterable, and others. The company is ISO 27001 certified (through June 2028) and GDPR compliant, positioning it for enterprise and EU data licensing contracts.

AtData operates a hybrid go-to-market combining product-led growth (free trial, self-serve API, pay-as-you-go) with enterprise field sales for large-scale data licensing and custom integrations. Revenue is generated through three primary streams: usage-based pricing for real-time email verification APIs, licensing of proprietary email identity datasets (Email Identity File, Alternate Email File, Open Score Intelligence), and recurring subscriptions for behavioral intelligence. The company serves thousands of businesses globally across verticals including automotive (Mazda, Stellantis), retail (Staples, Camping World, Skims), fashion/sports (adidas), media (The New York Times), and nonprofit (The Nature Conservancy), with dedicated industry pages for FinTech, Payments, LeadGen, Affiliate Marketing, Tourism, and Technology Platforms. Past inorganic moves include the acquisitions of Rapleaf (2013) and XVerify (2019).

Name

TowerData

Legal name

AtData, LLC

Website

https://towerdata.com

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Short description

TowerData (operating as AtData) is a private email address intelligence company that provides ML-driven email validation, identity matching, data enrichment, and fraud prevention services to enterprise marketers, fraud teams, and data platform customers globally via API and a 2.4 billion-record proprietary database.

Ownership category

akta.pro rank

Product category

Email Address Intelligence / Data Quality & Validation

NAICS

Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)

SIC

Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Data Platforms & Modern Data Stack Services (Lakehouse, DW, MDM) (BPAEAHAC)

akta.pro secondary industries

Data Sharing, Data Exchange & Data Marketplace Platforms (HDAEABAH), Risk, Compliance & Controls for Embedded Finance (KYB/KYC/AML, Fraud, Disputes) (FSAGALAK)

Keywords

• Email validation services
• Email identity intelligence
• Fraud risk scoring
• Data licensing platform
• Identity resolution API

Headquarters

HQ city

Fairport

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Email Verification & Validation Services: Charges for real-time email verification APIs and bulk validation services. Customers pay based on volume of emails validated, with tiered pricing based on usage levels.
2. Data Licensing: Licensing access to proprietary email identity database and data enrichment services. Enterprise customers license data for segmentation, personalization, and customer intelligence.
3. Email Activity Intelligence: Subscription-based access to email behavioral signals and intelligence data for marketing optimization and customer insights.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels9 records

Core offering

AtData (formerly TowerData) sells an email address intelligence platform that delivers real-time email validation, fraud risk scoring, identity matching, consumer data enrichment, and licensed email identity datasets. The offering combines a 2.4 billion-record proprietary email identity database with machine-learning APIs and pre-built integrations into major marketing automation, CRM, and data warehouse platforms for B2B customers across automotive, eCommerce, FinTech, payments, and nonprofit verticals.

Product overview

AtData is an email address intelligence platform offering a comprehensive suite of products across four core areas: Email Validation (SafeToSend, SafeToTrust, List Guard), Identity Matching (Alternate Email, Email Append, Postal Append, Website Visitor ID), Consumer Insights (Demographics, Quality Score, Email Opener Data), and Fraud Prevention (Risk Scoring, Domain & IP Analytics, Email Age & Activity, Identity Correlation & Anomalies, Phone Validation, Platform Tumbling Check). The platform also provides Data Licensing products (Email Identity File, Alternate Email File, Open Score Intelligence) for enterprises to power custom solutions, along with Data Services (Data Science & Analytics, Data Platforms, Identity Graphs, Research Studies). The platform processes over 2.4 billion email identity linkages and 150+ monthly email activity signals.

Differentiator

Problem solved

Functional benefit

Products and services

• SafeToSend Email validation service that ensures clean and correct email data using machine-learning models built on email activity data, with the SafeToSend Guarantee for deliverability. Targeted at marketers and email senders needing to reduce bounce rates and protect sender reputation.
• SafeToTrust Fraud prevention solution that combats promotion fraud by analyzing email-based risk signals and patterns. Targeted at fraud preventers protecting against coupon and promotion abuse.
• List Guard 24/7 email list monitoring service that continuously validates and protects email lists from invalid or risky addresses. Targeted at marketers running ongoing email programs who need continuous hygiene.
• Alternate Email Identity matching service that expands digital reach by identifying alternate email addresses associated with individuals. Targeted at marketers and data teams needing to resolve customer identities across multiple email addresses.
• Email Append Service that adds email addresses to postal records, enabling multi-channel communication capabilities. Targeted at marketers with offline lists who need to add email channels.
• Postal Append Service that adds postal addresses to email records, enriching digital identities with physical location data. Targeted at marketers enriching email profiles for direct mail campaigns.
• Website Visitor ID Identity resolution service that identifies unknown website visitors by correlating email signals. Targeted at digital marketers seeking to identify and remarket to anonymous site traffic.
• Demographics Consumer insights service providing demographic and behavioral data to enhance customer profiles. Targeted at marketers and data teams enriching CRM records for segmentation and personalization.
• Quality Score Data enrichment tool that quickly determines the value and quality of email addresses for marketing purposes. Targeted at marketers prioritizing high-value addresses in their lists.
• Email Opener Data Engagement data service that identifies actively engaged customers based on email interaction signals. Targeted at marketers seeking to identify and re-engage active email subscribers.
• Email Identity File Scalable identity foundation dataset for licensing, containing email address linkages across the AtData database. Targeted at enterprises and data providers building identity graphs and custom data products.
• Alternate Email File Digital identity intelligence dataset that expands identity resolution capabilities with alternate email associations. Targeted at enterprises and data providers enriching identity graphs.
• Open Score Intelligence Real-time email engagement behavior dataset providing insight into actual recipient interactions. Targeted at enterprises and data providers building engagement models and audience scoring products.
• Data Science & Analytics Professional services for advanced analytics and data science initiatives using AtData's proprietary datasets. Targeted at enterprises needing custom modeling, analytics, and insights.
• Data Platforms Technology integration services for connecting AtData's data with enterprise data platforms (e.g., Snowflake). Targeted at enterprises integrating email intelligence into their data warehouses.
• Identity Graphs Identity resolution and graph services that connect fragmented identity signals across channels. Targeted at enterprises and data providers building unified customer identity graphs.
• Research Studies Custom research and market intelligence studies powered by AtData's email-centric data. Targeted at enterprises and research buyers needing bespoke market intelligence.
• Fraud Prevention Suite Email-centric fraud prevention suite that combines risk scoring, domain and IP analytics, identity correlation and anomaly detection, phone validation, and platform tumbling checks to stop fraud early with email intelligence. Targeted at fraud, risk, and trust & safety teams at FinTech, payments, eCommerce, and technology platform companies.

Quantifiable outcome

• Reduces undeliverable emails and improves sender reputation scores
• +2 more outcomes

Named customers8 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration18 records

AI capability4 records

Feature5 records

Partnerships

Eleven partnerships are on record, tiered core.

• SalesforcecoreTechnology or IntegrationSalesforce integration allowing customers to verify emails and enrich Salesforce CRM records directly within the Salesforce platform. Enables seamless data quality management within customer relationship management workflows.
• HubSpotcoreTechnology or IntegrationHubSpot integration for email verification and list cleaning directly within HubSpot marketing and CRM tools. Allows marketers to maintain clean contact lists and improve campaign performance.
• MarketocoreTechnology or IntegrationMarketo integration enabling email verification and data enrichment for marketing automation workflows. Supports enterprise marketing teams with data quality in their marketing campaigns.
• SnowflakecoreTechnology or IntegrationSnowflake integration allowing data exchange and enrichment within the Snowflake Data Cloud. Enables customers to access email intelligence data directly in their data warehouse.
• KlaviyocoreTechnology or IntegrationKlaviyo integration for email marketing platforms enabling real-time email verification and list hygiene within e-commerce marketing workflows.
• MailChimpcoreTechnology or IntegrationMailChimp integration allowing users to verify emails and clean lists directly in the MailChimp platform, improving email campaign deliverability.
• ActiveCampaigncoreTechnology or IntegrationActiveCampaign integration for email verification and list management within marketing automation workflows.
• Campaign MonitorcoreTechnology or IntegrationCampaign Monitor integration enabling email verification and data enrichment for email marketing campaigns.
• Constant ContactcoreTechnology or IntegrationConstant Contact integration for email list verification and cleaning to improve campaign performance.
• IterablecoreTechnology or IntegrationIterable integration for cross-channel marketing platform enabling email verification and customer data enrichment.
• EmarsyscoreTechnology or IntegrationEmarsys integration for enterprise marketing platform with email verification and personalization.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• ZeroBounce: ZeroBounce is a direct competitor offering email validation, verification, and deliverability scoring services for marketers. It overlaps with AtData's SafeToSend and List Guard products and serves the same SMB-to-enterprise email hygiene buyer.
• Clearbit: Clearbit (now part of HubSpot) provides company and contact data enrichment APIs used inside martech and CRM workflows, directly competing with AtData's Email Append, Postal Append, and Demographics enrichment SKUs at the integration layer.
• NeverBounce: NeverBounce provides real-time email verification and list cleaning APIs, competing head-to-head with AtData on validation accuracy, bulk processing, and platform integrations. Its pricing model and target customers closely mirror AtData's email verification SKUs.
• Validity (Return Path / BriteVerify): Validity operates BriteVerify (email verification) and the Return Path deliverability intelligence ecosystem, making it a direct competitor across AtData's email validation, list monitoring, and deliverability use cases. It targets the same enterprise martech buyer.
• Melissa Data: Melissa (Melissa Data) provides address verification, email verification, identity resolution, and data quality APIs, making it a direct competitor to AtData across verification, identity matching, and postal/email append services.

Broad incumbents

• LiveRamp: LiveRamp operates a leading identity resolution and data collaboration platform used by enterprises for cross-channel marketing. AtData's identity matching, data licensing, and Snowflake integration compete against a subset of LiveRamp's broader RampID-based offering.
• Experian (Consumer / Marketing Services): Experian's marketing services and identity divisions provide audience data, identity resolution, and fraud/risk analytics. While much larger and broader, Experian competes with AtData's enterprise data licensing and identity graph offerings to large enterprise buyers.
• Data.com (Salesforce): Salesforce's data and identity capabilities (historically Data.com plus native enrichment and CDP features) compete with AtData's CRM enrichment and identity append SKUs, particularly for customers standardizing on the Salesforce stack where AtData is also an integrated partner.
• ZoomInfo: ZoomInfo is a much larger B2B data and intelligence platform with comparable data licensing, identity resolution, and CRM enrichment capabilities. It overlaps with AtData's data licensing and identity resolution SKUs but is broader in B2B contact intelligence and considerably larger.

Emerging players

• Hunter.io: Hunter provides email finding, verification, and outreach tooling primarily for SMB and growth marketers. It overlaps with AtData on email verification and identity enrichment but is more focused on prospecting workflows than large-scale data licensing.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/TowerData
• YouTubeyoutube.com/@atdata
• Facebookfacebook.com/TowerData
• LinkedInlinkedin.com/company/71680

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

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

M&A2 records

Investments

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

Frequently asked questions about TowerData