Private company

Roundarch Isobar

Logo: Lwahls, Public domain, via Wikimedia Commons3

Isobar, known as Roundarch Isobar until 2013, is a digital marketing agency. It was formed after the 2012 merger of Roundarch and Isobar U.S., following the acquisition of Roundarch by Dentsu Aegis Network in a $125 million deal.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

Isobar, known as Roundarch Isobar until 2013, is a digital marketing agency. It was formed after the 2012 merger of Roundarch and Isobar U.S., following the acquisition of Roundarch by Dentsu Aegis Network in a $125 million deal.2

Sources

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