Mark F. Radcliffe concentrates in strategic intellectual property advice, private financing, corporate partnering, software licensing, Internet licensing and copyright and trademark. Leading international legal publishers consistently rank Mr. Radcliffe among the top lawyers in his profession. The respected English publishers Chambers and Partners has repeatedly named him in Chambers USA: America's Leading Lawyers for Business, and has described him as "outstanding" and "a leader in open source-related matters." Legal 500 also recognizes him, commenting: "His expertise in providing strategic IP advice, with particular specialism in open-source matters, has won him plaudits. Indeed, one client describes him as 'probably the best lawyer in his field'. 

Additionally, Mr. Radcliffe is listed in The Best Lawyers in America. In 2004, he was named one of Northern California's Top 100 intellectual property Super Lawyers, in a joint project of Law & Politics and San Francisco magazines.

He is also listed in The International Who's Who of Internet and e-Commerce Lawyers 2008 and in numerous other guides, including the PLC Which Lawyer? Yearbook 2009, the 2003 Expert Guide – The World's Leading Trademark Lawyers and many annual editions of The International Who's Who of Business Lawyers. In 2009 and 2010, Intellectual Asset Magazine named him among the "IAM 250 - The World's Leading IP Strategists." In 1997, the National Law Journal cited him as one of America's 100 most influential lawyers. The San Francisco Business Times has named him among the best lawyers in the San Francisco Bay area.