The third developer I visited in San Francisco was even more unlike the others than the others were to each other. The online vendor of women's vintage and vintage-style clothing ModCloth was started by high school sweethearts Susan Gregg and Eric Koger. Susan had an interest in vintage clothing and was amassing quite a collection, and while still studying at Carnegie Mellon University in Pittsburgh, she started selling some of her excess vintage clothing online. Her boyfriend Eric (they have since married) was studying at the same institution, and he helped her launch a website in 2002. ModCloth grew like topsy from there. Now, just over a decade later, the firm is headquartered in San Francisco's Market district (the site I visited) while retaining an office and despatch warehouse in Pittsburgh.
What makes it markedly different to the other companies I visited is 1/ it's an online business, so it's platform independent, and indeed most of the computers at the San Francisco site I saw were non-Apple PCs.
2/ Almost all the products sold by ModCloth are expressly for women - there were only two or three products listed for men specifically in the company's large and ever-expanding catalogue.
Finally, 3/ the staff at ModCloth's San Francisco office is overwhelmingly female. While women were represented at the other two companies (Smule and AutoDesk), they probably had a more typical ratio of men and women in this industry; ie men in the majority. At ModCloth, the only men I noticed were some of the developers and those handling web and traffic 'backend', which is located in San Francisco and to some extent in Pittsburgh.
ModCloth has grown fast. It now has 400 staff in three centres, including an office in Los Angeles. The business model is of an online community united by its shared interest, and ModCloth's modus operandi is clearly about engaging, retaining and satisfying this community. The customer is referred to constantly as 'she', quite deliberately, and in a familiar and friendly way. You can tour founder Susan Gregg Koger's 'virtual closet' and she still blogs on the site every month.