Epsilon Logo
  • Platform
    • PeopleCloud
    Capabilities
    • Identity resolution
    • Artificial intelligence
    • Intelligent creative
    • Connected marketing
    Products
    • Digital media
    • Data clean room
    • Customer data platform
    • Loyalty platform
    • Consumer marketing data
    • Strategic services
    • Retail media
    • Website personalization
    • Automotive marketing
    • All products >
  • By use case
    • Unify & cleanse your first-party data
    • Identify high value customers
    • Connect messages across paid & owned
    • Increase customer loyalty & retention
    • Personalize media across channels
    • Acquire new customers
    • All use cases >
    By channel
    • Display
    • Connected TV
    • Email
    • Audio
    • Online video
    By function
    • Partners
    • Publishers
    • All resources
    • Research & insights
    • Case studies
    • Blog
    • News
    • About us
    • Culture
    • Pressroom
  • Careers
  • AdChoicesAdChoices Logo
  • Platform

    • PeopleCloud
  • Products

    • Digital media
    • Data clean room
    • Customer data platform
    • Loyalty platform
    • Consumer marketing data
    • Strategic services
    • Retail media
    • Website personalization
    • Automotive marketing
    • All products
  • Capabilities

    • Identity resolution
    • Artificial intelligence
    • Intelligent creative
    • Connected marketing
  • Industries

    • Consumer packaged goods
    • Financial services
    • Health
    • Restaurants
    • Retail
    • Travel
    • Tourism
    • Nonprofits
    • Telecom, media & entertainment
    • All industries
  • Channels

    • Display
    • Connected TV
    • Email
    • Audio
    • Online video
  • Resources

    • All resources
    • Research & insights
    • Case studies
    • Blog
    • News
  • Use cases

    • Unify & cleanse your first-party data
    • Connect messages across paid & owned
    • Identify high value customers
    • Acquire new customers
    • Increase customer loyalty & retention
    • Personalize media across channels
    • All use cases
  • About

    • About us
    • Culture
    • Pressroom
    • Locations
    • Careers
    • Awards & recognition
  • Functions

    • Partners
    • Publishers
  • Learn

    • Customer loyalty strategy
    • Connected TV
    • Programmatic advertising
    • Data clean room
Consumer Info 
Privacy Policy 
Terms & Conditions 
AdChoices 
Your Privacy Choices 
Privacy Settings 
©2026 Epsilon Data Management, LLC. All rights reserved. All names and logos are trademarks or registered trademarks of their respective owners.
  1. Homepage
  2. Identity Capabilities

Identity resolution

Epsilon’s industry-leading COREid provides the recognition needed to deliver personalization at scale.

Smiling woman, laptop displaying a personalized email, and customer data points including 'Verified purchaser'.

Recognize consumers—anywhere and everywhere

If you don’t recognize the person you’re speaking to, it’s hard to engage in a relevant conversation.

Doing this at scale requires recognizing every individual in the moment, wherever they are—in your systems and across channels. Epsilon’s COREid connects fragmented data to real people, and real people to your messaging across paid, owned and earned channels.

Fragmented data

Marketers' customer and prospect data is dispersed across teams and systems, leading to a fragmented and incomplete view of any individual.

Irrelevant messages

And delivering relevant messages across paid, owned and earned channels is further complicated if they can't recognize a person when they encounter them.

Get a complete picture

Epsilon COREid unifies what you know about individual consumers from interactions in various channels across disparate systems. And when augmented with Epsilon's proprietary demographics, psychographics and buyergraphics—as well as data from other partners—you can create a single, robust and unified View of any individual.

Recognize each individual you encounter

COREid also plays a crucial role in engaging consumers through marketing and advertising campaigns. Armed with the ability to recognize consumers wherever they encounter them, you can engage each individual with a voice that is harmonized across their paid, owned and earned channels.

Measure people, not devices

Accurate measurement requires mapping exposure and outcome data back to an actual person, not just a digital identifier. COREid is the industry's only 100% deterministic, person-level identifier mapped to a verified name and address. This allows you to truly understand the impact of your marketing and advertising.

What identity resolution can do for your marketing

Unify and cleanse customer data

Connect and clarify disparate datapoints to create 1 View of each individual.
Get started

Augment customer data with second- and third-party data

Fill in data gaps to provide more complete customer profiles.
Build your data strategy

Understand who you want to reach

Recognize consumers in digital channels to engage those you want to reach with given campaigns and suppress those you don’t.
See how it works

Personalization at scale requires more than just identity resolution. 

Once you recognize an individual, you need to be able to decide in real time what to say to them and be able to say it. That’s where AI and intelligent creative come into play, which greatly expands your use cases.

Two hand-drawn speech bubbles, one white and one orange with three dots.

Personalize messages that drive conversion

Deliver campaigns with the right message and creative in the moments that matter to drive maximum performance. 

Doodle icon of a browser window displaying user profiles.

Harmonize conversations across paid, owned and earned channels

Reach customers where they are by connecting individuals across paid, owned and earned channels.

Target with checkmark icon.

Optimize and measure campaigns in real-time

Measure success and adjust campaign strategy with real-time, closed-loop reporting. 

Epsilon’s industry-leading identity resolution capabilities 

Epsilon’s industry-leading COREid powers our suite of solutions. With unrivaled accuracy at an individual level, the highest-quality omnichannel reach and seamless connectivity online and offline, our identity resolution capabilities open brands up to a unified, comprehensive view of their universe of potential buyers through identity resolution.

What makes us different 

https://cdn.sanity.io/images/bbfpkf4q/eps-prod/9866c062710bb8c5575331da2b98415513d399ee-108x108.svg

Accuracy and precision

Each Epsilon COREid is one real person, anchored in name and address, giving you insights on 255M+ unique U.S. individuals.

https://cdn.sanity.io/images/bbfpkf4q/eps-prod/94e014c696e8261161a72b1a19f14379a285e378-108x108.svg

360-degree view

COREid is a single source of identity for both offline and online touchpoints, and connects demographic, transactional and behavioral data—enhancing your insights, activation and measurement.

https://cdn.sanity.io/images/bbfpkf4q/eps-prod/b8d38b238fceb1b860c9820b8d3cd3257a00d440-108x108.svg

Protection from signal loss

COREid is the only identity solution on the market that is based in a complete name and address—not a device, cookie or email.

https://cdn.sanity.io/images/bbfpkf4q/eps-prod/d280275d658d11bd7669f7da6854469f62b3f019-108x108.svg

Privacy-first emphasis

Epsilon has a trusted, 50+ year legacy exceeding consumer, client and regulatory expectations for privacy and data stewardship.

Epsilon

Person-based identity 

  • Links disparate pieces of data to a single individual in a pseudonymized view, giving a more holistic profile of a consumer

  • Uses advanced tools like AI to identify and evaluate probabilistic matches based on data

  • Fills in data gaps to reduce inaccuracies and redundancies

  • More effective scalability based on dynamic data that stays fresh and up-to-date

vs.

Others

Device-based identity 

  • Uses weak identifiers, like email or digital IDs (commonly third-party cookies), to link consumer behaviors and actions

  • Requires “exact” identifier matching to link profiles

  • Prone to duplicative, incomplete and inaccurate data sets

  • Less scalable and usually a static data set

Epsilon

Person-based identity 

  • Links disparate pieces of data to a single individual in a pseudonymized view, giving a more holistic profile of a consumer

  • Uses advanced tools like AI to identify and evaluate probabilistic matches based on data

  • Fills in data gaps to reduce inaccuracies and redundancies

  • More effective scalability based on dynamic data that stays fresh and up-to-date

vs.

Others

Device-based identity 

  • Uses weak identifiers, like email or digital IDs (commonly third-party cookies), to link consumer behaviors and actions

  • Requires “exact” identifier matching to link profiles

  • Prone to duplicative, incomplete and inaccurate data sets

  • Less scalable and usually a static data set

Ulta: Going more than skin deep thanks to identity

Creating emotional connections with customers is especially important in the beauty industry. Working with Epsilon, Ulta Beauty used identity resolution to get a comprehensive view of their customer and tap into rich insights for more personalized connections with consumers—and help the brands it serves to do the same.

Learn more

Learn how our products use identity resolution

All of Epsilon’s solutions are powered by identity. Discover how our solutions can help you meet your goals.

Magnifying glass over a computer screen showing a webpage and a data graph.

Digital

Reach real people with ads on the entire open web.

Learn more
Open padlock icon.

Retail Media

Maximize ad revenue for in-store and online purchases with person-first identity.

Learn more
Computer monitor displaying a line graph.

Customer Data Platform

Harmonize, clean and enhance your first-party data for a more holistic view. 

Learn more
Database analysis icon.

Data Clean Room

Find your best customers and prospects who look just like them. 

Learn more
Orange heart with blue outline.

Loyalty

Gain deeper insights into your most loyal customers. 

Learn more
A computer monitor icon.

Messaging

Personalize every message with real-time AI capabilities. 

Learn more
Browser window with an eye icon.

Accelerate

Personalize website experiences for every user.

Learn more

FAQs

Are all identity resolution solutions fairly similar?

No. Not all identity resolution solutions can unify offline and online touchpoints, nor do they connect to significant amounts of proprietary demographic, transactional, and behavioral data that enhances insights, activation and measurement.

Can we create effective identity resolution in-house? 

Building an identity graph is complex, resource intensive and costly, and can often resort in poor data quality and reliability. Vendors with experience in the identity resolution space have the scope, scale and technology to deliver identity resolution all with privacy-by-design.

Are third-party cookies and contextual targeting a good alternative to identity resolution?

Third-party cookies are largely extinct, unreliable and offer limited control for brands hoping to driver personalization through their advertising and marketing. Contextual targeting focuses on the context consumed, not the individual consuming it, and lacks the ability to create meaningful connections to real people at scale.

How can I get started?

Talk to one of our experts today about accessing your data quality and technology to deploy identity resolution.

Other resources

Blog
21 ways identity resolution can change your marketing
21 use cases to show you the real-life benefits of employing an identity resolution solution.
Learn more
Blog
How Wingstop uses data, identity and activation to spice up their digital marketing
Learn how data, identity and activation drove real results for Wingstop.
Learn more
Blog
Higher performing marketing campaigns require more than data and identity—they need activation and measurement as well
Data bolstered by identity is best used with technology that can activate and measure campaigns with it.
Learn more
Blog
Better AI starts with strong data and identity
While AI can make life easier for marketers and advertisers, having quality data and identity to fuel that AI is critical to realizing...
Learn more
Resource center
Use identity and AI to supercharge your campaigns
Discover how marketers can couple AI and identity resolution in a clean room to empower high-performing campaigns, reduce media waste and...
Learn more
Blog
Get the best view of your customers with the right CDP
Customer data platforms equipped with identity resolution can help brands see beyond their limited view of their customers.
Learn more