MadHive is an advertising technology company that uses blockchain technology to improve the efficiency and transparency of the advertising industry. The company was founded in 2017 and is headquartered in New York City. MadHive's platform allows advertisers to target specific audiences and track the performance of their campaigns in real-time. The company's technology also helps to prevent fraud and ensure that ads are delivered to real people. MadHive has partnerships with a number of major media companies and has received funding from several prominent venture capital firms.