# Conversant

> Conversant is the Chicago-based advertising technology business formerly known as ValueClick and now the digital media arm of Epsilon, part of Publicis Groupe. It combines customer identity, personalized media, analytics and campaign services to help brands acquire and retain customers across devices; its historical portfolio also included CJ Affiliate.

- **Founded:** 1998
- **Headquarters:** Chicago, United States
- **Founders:** Brian Coryat (Founder of predecessor ValueClick)
- **Products:** Personalized media, CJ Affiliate by Conversant, Conversant Ad Server and Tag Manager, CORE identity technology, Epsilon Digital
- **Notable:** Reached the public markets as ValueClick on March 30, 2000., Unified five named businesses under Conversant in February 2014., Alliance Data agreed to acquire Conversant for approximately US$2.3 billion in 2014.

## Products & services

- **Personalized media** — Historical Conversant service combining identity, automated creative, media buying and measurement across display, mobile and video.
- **CJ Affiliate by Conversant** — Historical affiliate business connecting advertisers with publishers; advertisers pay commissions for referred transactions and the network provides tracking and support.
- **Conversant Ad Server and Tag Manager** — Historical ad-serving and tag-management products inherited from Mediaplex.
- **CORE identity technology** — Identity resolution and cross-device matching capability reported as launched in late 2016.
- **Epsilon Digital** — Current successor offering: a full-service programmatic platform for planning, activation, optimization and measurement across display, connected TV, video and audio. Launch year not established.
- **Conversant Disruptor** — Open-source Java concurrency library, distinct from the paid advertising products; released under Apache 2.0.

## Achievements

- Reached the public markets as ValueClick on March 30, 2000.
- Unified five named businesses under Conversant in February 2014.
- Alliance Data agreed to acquire Conversant for approximately US$2.3 billion in 2014.
- Domino’s campaign announcement reported 10:1 incremental return on ad spend in February 2020.

## Latest updates

- **2026-03** — Successor-company update: Epsilon launched UK in-store sales attribution reporting for its Retail Media platform on March 9.
- **2025-12** — Successor-company update: Ocado Ads and Epsilon announced a COREid-powered offsite retail media partnership on December 3.

## Links

- Website: https://www.epsilon.com/us
- LinkedIn: https://www.linkedin.com/company/conversantinc
- Twitter/X: https://twitter.com/conversantde
- GitHub: https://github.com/conversant
- Facebook: https://facebook.com/conversantinc

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Profile page: https://yespress.io/conversant
Published by YesPress — https://yespress.io
Last updated: 2026-10-23