Stepstone, originally named Productivity Products International (PPI), was a software company founded in 1983 by Brad Cox and Tom Love, best known for releasing the original version of the Objective-C programming language.

The former firehouse factory at 75 Glen Road, Sandy Hook, CT where Stepstone was housed in the late 1980s

PPI/Stepstone enjoyed modest success not only supplying semi-"object-oriented" software, but also among those who wanted an ANSI C compiler on platforms that didn't otherwise support one — the Objective-C compiler produced code which could be input to a native C compiler, which often was K&R C. The ICpak 201 interface toolkit was submitted to the Open Software Foundation as a candidate for their interface standard but was not expected to win over Motif.

In April 1995, NeXT acquired the Objective-C trademark and rights from Stepstone. At the same time, Stepstone licensed back from NeXT the right to continue selling their Objective-C based products. As Apple Computer acquired NeXT a year later, they now hold the rights to Objective-C. The U.S. software company Stepstone appears to have gone out of business in the early 2000s.

Coordinates: 41°26′1.7″N 73°16′33.2″W / 41.433806°N 73.275889°W / 41.433806; -73.275889