AppNexus

AppNexus was a large technology company that created and provided a cloud-based software platform for online advertising. It enabled and optimized real-time programmatic buying and selling of digital advertising inventory. AppNexus was acquired by AT&T in 2018 and became part of Xandr, AT&T`s advertising and analytics division. Xandr, including the former AppNexus technology, was later acquired by Microsoft in 2022.

Website: https://www.microsoft.com/en-us/advertising