Public relations firm Hill & Knowlton has ridden its reputation as a straight-shooter straight to the top. The company (whose founder John W. Hill emphasized the importance of dealing honestly and openly with the press) is one of the largest PR firms in the US and a part of advertising conglomerate WPP Group. Hill & Knowlton's services range from marketing communications to corporate reputation management to political lobbying. It caters to the technology and health industries; clients have included Microsoft and Intel. Lobbying firm Wexler & Walker Public Policy Associates and Finnish unit Hill and Knowlton Finland Oy act as subsidiaries for Hill & Knowlton.

Hill & Knowlton provides pro bono marketing and communications services to Ashoka and Ashoka Fellows. This global partnership is critical to advancing the profession of social entrepreneurship by providing strategic communications counsel, media and presentation training and other consulting services – including serving as organizational board members for Ashoka Fellows. To date, 25 offices on 5 continents have contributed to this rewarding effort. Hill & Knowlton is enabling social entrepreneurs to gain greater support for their ideas and to share best practices around the world.