SpotX

Leading independent video SSP prior to acquisition by Magnite

SpotX was a video advertising technology platform that provided programmatic solutions for publishers, broadcasters, and media companies to monetize their video content across connected TV (CTV), desktop, and mobile devices. Founded in 2007, the company established itself as one of the leading supply-side platforms (SSP) specifically focused on video advertising, offering header bidding, real-time bidding, and direct sales capabilities. The platform was particularly strong in the CTV and over-the-top (OTT) advertising space, serving premium publishers and broadcasters globally. In April 2021, SpotX was acquired by Magnite (formerly Rubicon Project) for approximately $1.17 billion, creating one of the largest independent sell-side advertising platforms. The acquisition was strategic for Magnite to strengthen its position in the rapidly growing CTV and video advertising markets. Following the acquisition, SpotX's technology and team were integrated into Magnite's operations, with the SpotX brand eventually being phased out in favor of the unified Magnite brand. The platform's legacy continues through Magnite's CTV and video advertising capabilities, which built upon SpotX's technological foundation and market relationships. At its peak, SpotX served hundreds of premium publishers and broadcasters worldwide, processing billions of ad requests monthly and was recognized as a leader in programmatic video advertising, particularly for its innovation in header bidding for video and CTV advertising solutions.