We'd love to hear from you!

If you have any questions about our services, need some help, or just want to chat, we're here for you. Simply fill out the form below, and one of our team members will reach out to you soon.

If you have questions regarding U.S. consumer data privacy, click here.

Contact Epsilon
P.O. Box 1478
Broomfield, CO 80038
Attn: Privacy
(866) 267-3861
privacy@epsilon.com

Your Privacy Choices

Thank you!

Maximize site monetization

Publisher monetization shouldn’t be a one-size-fits-all approach. Epsilon can help you tap the power of your audience and enhance monetization with tools and flexible integrations that adapt to your business needs. With our direct demand, premium technology platform, and future-proofed publisher identity solutions, you can unlock the most value from your properties.

CORE Private Exchange: the complete publisher platform that powers monetization and control

Advanced UI

Manage, analyze and optimize your inventory with our transparent, robust publisher interface.

Identity solutions

With two identity solutions, we enable incremental impressions and revenue by immediately and accurately identifying your traffic (including cookieless visitors).

Publisher API

Get the information you need, where you need it. Connect to our API and access your metrics in your own systems.

Why join CORE Private Exchange?

Access to direct demand

Connect your audience to premium advertisers, with direct demand backed by Epsilon and Publicis Groupe. We support 21 formats across web, in-app, OLV and CTV.

Streamline inventory management with heightened control

Our intuitive publisher UI gives you the detailed real-time reporting, yield-management tools and brand safety controls you need to optimize performance.

Boost and future-proof your monetization potential with proven identity solutions

With Epsilon’s identity solutions, PubLink and Shared ID with Reverse Proxy*, you can immediately and accurately identify previously unaddressable traffic, leading to incremental impressions and revenue. Built on first-party identifiers and authenticated data, our solutions are insulated from third-party cookie deprecation and potential regulation.

*SharedID is an open-source identifier maintained by Prebid. Reverse Proxy is an Epsilon-specific integration extension that improves upon an existing Shared ID implementation.

Learn more

Receive support without the hassle

We’ll help you make the most of our solutions. Every publisher has a dedicated, live support representative to help you build effective strategies and troubleshoot questions.

What makes us different

No fees

Capture more revenue per ad sold.

Capture more revenue per ad sold. Epsilon charges zero fees.

Direct demand

We connect your inventory to demand from Epsilon and Publicis Groupe media clients.

We connect your inventory to demand from Epsilon and Publicis Groupe media clients. We represent the top brands in the world.

Immediate lift

Our publisher identity solutions connect to Epsilon’s robust ID graph of 255M+ U.S. consumers.

Our publisher identity solutions connect to Epsilon’s robust ID graph of 255M+ U.S. consumers. This allows us to identify traffic and increase impressions right from the start.

High-touch support

Every publisher receives a dedicated support representative.

Every publisher receives a dedicated support representative. So you don’t have to rely on static FAQ pages.

Flexible integrations for your preferred approach:

Header bidding

Connect to our numerous server-side and client-side integration options, supporting web and app inventory.

Learn more

SSAPI

With Full and Lite integrations, we can meet the needs of app and CTV partners.

Learn more

Direct tags

Implement JavaScript tags to enable ad serving across web, mobile web, video and connected devices.

Learn more

Accurately identify your site audience with our publisher identity integrations

Get immediate, measurable revenue lift from our publisher identity integrations. Backed by Epsilon’s CORE ID—the industry’s most accurate, stable, and scalable identity of 200M+ U.S. consumers—our solutions help you identify more of your visitors right from the start. That way, you can increase your bid opportunities and earnings, while also providing your users with more personalized browsing experiences.

Shared ID with Reverse Proxy

An open-source solution, Shared ID uses domain-specific first-party identifiers to consistently recognize unauthenticated site visitors, including browsers that don’t support third-party cookies such as Safari and Firefox. Originally created by Epsilon in 2018, the solution was transferred to Prebid in 2020 to expand industry access. Shared ID now stands as Prebid’s most widely adopted solution. Reverse Proxy, an Epsilon-exclusive integration enhancement, extends the resiliency of Shared ID so you can identify your site audience longer and with more confidence.

PubLink

An Epsilon-created integration, PubLink activates your authenticated data by deterministically identifying your logged-in traffic even when there is no cookie. This improved audience identification allows you to unlock more inventory, earn more ad income and deliver a more personalized ad experience to your visitors.

How we’re unique

Immediate results

Because our solutions connect to an established, scaled identity graph (CORE ID), you’ll see immediate increases in identification rates, impressions, and revenue.

Free to use

Our publisher identity solutions are available to all publishers at no cost.

Future-proofed approach

Our identity integrations rely on first-party identifiers and authenticated customer data, giving your monetization insulation from third-party cookie deprecation and potential privacy concerns.

Privacy first

We uphold the highest standards of privacy to ensure compliance with privacy laws across the globe, including GDPR, CPRA and others.

The benefits of implementing an identity solution

Third-party cookies are going away, making it harder than ever to reach the right person. Our identity solutions are built to withstand these changes, so you’ll see real results.

6

average increase in cookieless bid requests identified with our identity solutions

518

average increase in bid rate on traffic with PubLink

285

average increase in impressions on traffic with an identity solution

Select your business model to see which Epsilon publisher identity solution is best for you

Primarily unauthenticated traffic

Primarily authenticated traffic

Both unauthenticated and authenticated traffic

Already have an alternative ID system in place?

Primarily unauthenticated traffic

We recommend Shared ID with Reverse Proxy, which uses domain-specific, first-party cookies to connect to Epsilon’s CORE ID. On average, Epsilon recognizes 5.9X more cookieless bid requests for publishers that implement SharedID with Reverse Proxy.

Primarily authenticated traffic

We recommend PubLink, which uses your consumers’ opted-in email log-in data to connect to Epsilon’s CORE ID. On average, Epsilon recognizes 6.2X more cookieless bid requests for publishers that implement PubLink. This leads to an average 290% increase in purchased impressions.

Both unauthenticated and authenticated traffic

We recommend you implement both Shared ID with Reverse Proxy and PubLink to enable the most robust identification and lift.

Already have an alternative ID system in place?

Our identity solutions are designed to provide additional monetization independent of and in tandem with alt IDs. Contact us to learn more about how we can add value along with your existing solution.

Insights