She is best known as the co-founder of the news website The Huffington Post. Arianna Huffington is also a nationally syndicated columnist and author.

Earlier this year AOL acquired The Huffington Post and made Huffington the president and editor in chief of The Huffington Post Media Group, which includes The Huffington Post and the existing AOL properties such as Engadget, AOL Music, Patch Media, and StyleList.