DEFCAD, Inc. is an American startup that has created a search engine and web portal for designers and hobbyists to find and develop 3D printable and other CAD models online.

[11][10] DEFCAD began as a repository where users could upload and download CAD models, but quickly became a community with the addition of an IRC channel and public forums.

[13] While the legal argument was not resolved in federal court, in a surprise reversal, the State Department agreed to settled its case with DEFCAD in 2018.

[14] At its core, this new suit cited a procedural error: the proper notice had not been given prior to enacting the change in how ITAR applied to small arms.

The site implemented a new model to comply with arms export law in which users would be charged $50 and vetted to ensure they were located within the United States and that they were citizens or legal residents.