Heidi Roizen (born 1958) is a Silicon Valley executive, venture capitalist, and entrepreneur.
She is known for speaking out against the harassment of women in technology, having herself received harassment in the past.
From 1983 to 1996, Roizen was co-founder and CEO of T/Maker Company, which made software for CP/M and MS-DOS computers, and later for the Apple Macintosh. Her brother, Peter Roizen was the other co-founder; he had graduated from the University of California, Berkeley, and had written the original software named “Table Maker” that had launched the company. From 1987 until 1994, Roizen also served on the board of directors of the Software Publishers Association and was its president from 1988 to 1990.
From 1996 to 1997, Roizen was Vice President of World Wide Developer Relations for Apple Inc. She also served on the board of Great Plains Software from 1997 until its acquisition by Microsoft in 2001.
Roizen also served as the Public Governor of the Pacific Exchange and on the executive committee of the National Venture Capital Association.