Arthur Mai has served as Chief Marketing Officer (CMO) at IONOS Group since March 2020. Since 2023 he also took over the CEO role of Sedo and since 2026 InternetX as well – both part of IONOS Group. In this role, he oversees all marketing and domain activities . Arthur Mai brings over 17 years of marketing experience to the position. Prior to joining IONOS, he served as CMO at idealo starting in 2015. From 2019 onwards, he also served as Managing Director of the affiliated subsidiary Comparado GmbH. At Project A Ventures GmbH—a company builder for digital startups—he established the marketing function, overseeing development, hiring, and the scaling of activities. Arthur Mai is deeply rooted in the startup ecosystem and is personally engaged in numerous startups.
