MediaMath | 51,939 followers on LinkedIn. MediaMath is the acclaimed independent advertising technology company for brands and agencies. | We are building a new accountable & addressable supply chain for the industry. Brands and their partners use our technology and services to achieve the performance they deserve with less effort. We created the first software for real-time media buying in 2007 and today work with over one-third of the Fortune 500 and more than 3,500 brands and their agency partners to grow and deepen direct customer relationships.