ArsDigita was a web development company founded by Philip Greenspun which started in Boston, Massachusetts in the mid-1990s, produced a popular toolkit (the ArsDigita Community System) for building database-backed community websites, and flourished at the peak of the Internet bubble. It was known for actively supporting an open-source version of its toolkit, although the community supporting that version split away from the company in 1999. A few years later the company fell on hard times, and in 2002 it was acquired by Red Hat.

The founders of the ArsDigita Corporation also set up a nonprofit organization, the ArsDigita Foundation, which sponsored a yearly programming contest for high school students and, in 2000, a free physical ArsDigita University teaching an intensive one-year course in undergraduate computer science.

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