Adtech is a German–American digital marketing company, providing publishers, agencies and ad networks with products to manage, serve and evaluate online advertising campaigns, including display, video and mobile formats. Founded in 1998 and headquartered in Frankfurt, Germany, Adtech is the ad serving platform of AOL's digital advertising business. Globally, Adtech has customers in more than 25 countries. It was acquired by AOL on May 15, 2007.

Adtech was founded in 1998 in Frankfurt, Germany. In 2000, the American Internet holding company CMGI acquired a controlling interest (80%) in Adtech. During the same year, Adtech became a private limited company.

Adtech’s ad serving technology has its roots in 1994 in Silicon Valley when Imgis Inc. established the basis for centralized ad serving using high-speed servers from Silicon Graphics (SGI). In 1998 Imgis Inc. was renamed AdForce Inc. Based on AdForce Inc.’s technology, Adtech opened its first data center in Frankfurt (Germany) in 1998.

In the fall of 2000, Adtech delivered its billionth banner ad since the opening of the original data center in September 1998. By 2001, Adtech had delivered its ten billionth banner ad. In 2002 Adtech supplied its 100,000th advertising campaign and delivered more than 100 million banners every day. In the first quarter of 2009, volume increased to over 125 billion ads per month.

Arianna Huffington (formerly Stassinopoulos; born Greek: Αριάννα Στασινοπούλου, July 15, 1950) is a Greek-born American author and syndicated columnist. She is best known for her liberal news website The Huffington Post. A popular conservative commentator in the mid-1990s, she adopted liberal political beliefs in the late 1990s. She is the ex-wife of former Republican congressman Michael Huffington.

In 2003, she ran as an independent candidate for Governor in the California recall election.

In 2009, Huffington was named as number 12 in Forbes' first-ever list of the Most Influential Women In Media. She has also moved up to number 42 in The Guardian's Top 100 in Media List.

In 2011, AOL acquired The Huffington Post for US$315 million and made Huffington president and editor in chief of The Huffington Post Media Group, which included The Huffington Post and then-existing AOL properties such as Engadget, AOL Music, Patch Media, and StyleList.

Huffington was born Arianna Stasinopoúlou in Athens, Greece, the daughter of Konstantinos (a journalist and management consultant) and Elli (née Georgiadi) Stasinopoulos, and is the sister of Agapi (an author, speaker and performer).^{[citation needed]} She moved to England at the age of 16, and studied economics at Girton College, Cambridge, where she was President of the Cambridge Union.