Evite: Selina Tobaccowala

At the height of the first dot-com boom, Selina Tobaccowala and college friend Al Lieb were determined to start a tech company. After a few false starts, they landed on the idea for Evite—an on-line invitation business that within its first year, attracted a million followers and $37 million in investment. When the tech bubble burst, Selina and Al were forced to lay off dozens of employees before selling Evite in 2001. But the company has survived to this day, and Selina remains a role model for women in tech. PLUS in our postscript "How You Built That," Jamia Ramsey describes how her frustration with pink ballerina tights led her to create Blendz, apparel for dancers that matches darker skin tones.