OpenXBuild

Developer-facing extension of OpenX's established SSP and ad exchange, targeting AdTech builders seeking composable infrastructure

OpenXBuild is a software suite and developer platform launched by OpenX on January 6, 2026, designed to enable publishers, advertisers, and technology partners to build custom advertising solutions on top of OpenX's programmatic infrastructure. It represents OpenX's strategic move to open up its ad exchange technology and offer modular, API-driven tools to the broader AdTech ecosystem. By providing building blocks from OpenX's established supply-side platform and exchange capabilities, OpenXBuild aims to accelerate innovation for companies looking to create bespoke ad tech solutions without building core infrastructure from scratch. OpenX itself is a well-established independent supply-side platform (SSP) and ad exchange founded in 2008, headquartered in Pasadena, California. The company has long been a significant player in programmatic advertising, known for its premium publisher relationships and focus on brand safety and ad quality. OpenXBuild extends this legacy by offering a more accessible, developer-oriented layer on top of OpenX's core technology stack. As a relatively newly launched product (as of early 2026), OpenXBuild's full feature set, pricing, and market traction are still emerging. However, it positions itself within the growing trend of composable AdTech, where companies seek modular, interoperable components rather than monolithic platforms. Its significance lies in democratizing access to OpenX's exchange-grade infrastructure for a wider range of builders and innovators in the advertising technology space.