Viant Technology Inc. operates as an advertising software company. It provides Adelphic, an enterprise software platform that enables marketers and their advertising agencies to plan, buy, and measure advertising across channels. The company also offers cloud-based self-service portal that provides customers with transparency and control over their advertising campaigns and underlying data infrastructure; omnichannel demand side platform for ad buyers to manage omnichannel campaigns and access metrics from each channel to inform decisions in other channels; and Data lake, a software and self-service enables customers with differentiated insights, including foot-traffic data reports, multi-touch attribution, and ROAS analytics. In addition, it provides Identity Resolution to reduce the need for cookies by enabling matching of people-based identifiers and allow marketers to reach targeted consumers in a privacy-conscious manner; and onboarding data integrations provides marketers with high match rates to audience insights for segmentation and targeting. The company sells its platform through a direct sales team focused on business development in various markets. It serves purchasers of programmatic advertising inventory; and large, independent, and mid-market advertising agencies. The company was founded in 1999 and is headquartered in Irvine, California.