In 1993, Greenspun co-founded photo.net, an
online community for people helping each other to improve their photographic skills. He seeded the community with "Travels with Samantha", a photo-illustrated account of a trip from
Boston to
Alaska and back; Samantha was how Greenspun referred to his Macintosh PowerBook 170 that he used to photo document his journey. Photo.net was co-founded with Rajeev Surati and Waikit Lau. Having grown to 600,000 registered users, it was acquired by NameMedia in 2007 for $6 million, according to documents filed in connection with a planned public offering of NameMedia shares. In 1995, Greenspun was hired to lead development of
Hearst Corporation's Internet services, which included early
e-commerce sites. He was also an early developer of database-backed web sites, which became the dominant approach to engineering sites with user contributions. Greenspun's
Oracle-based community site LUSENET was an important early host of free forums. Greenspun and Kohane continued to work together on medical informatics at Harvard Medical School.
ArsDigita Greenspun founded the open-source software company
ArsDigita in 1996. As CEO, he grew it to about $20 million in revenue before accepting any
venture capital investments. Greenspun and his co-founders at ArsDigita also established a
non-profit foundation that ran the
ArsDigita Prize, an award for young web developers, and the
ArsDigita University, a tuition-free one-year program teaching core computer science curriculum. Winners of the Prize included a 12-year-old
Aaron Swartz. ==Publications==