Franz Inc. was founded in early 1984 as a vehicle to produce and sell Macsyma. While that never developed into a business, Franz Inc. did sell Franz Lisp while working on their own Common Lisp implementation. Franz Lisp died out in the 80s as Common Lisp became more popular. Today, they sell Allegro Common Lisp, which is a direct descendant of the Common Lisp they developed in the mid-80s, and a series of products like AllegroCache built on it.