In October of that year, General Atlantic invested $30 million in Altair. Its consultancy services accounted for the majority of the company's revenue until 2004, when the sale and licensing of software overtook that. In addition to its software production, Altair hires out engineering consultants to its corporate clientele. Also in 2002, Altair opened offices in Seongnam, South Korea and Shanghai, China, adding those locales to its international footprint alongside India where it had begun investment in 1992. It maintained separate offices in Allen Park, Michigan. That year, the company moved into a new headquarters in Troy, Michigan. In 2002, Altair software aided in the design of the Airbus A380 by weight optimizing the aircraft wing ribs.

Its software also found uses in other sectors, including aerospace ( NASA), aviation ( Airbus), consumer electronics ( Nokia), and toy manufacturing ( Mattel), among others. Its software also aided in the development of the Young America and AmericaOne racing yachts, the former of which was used to compete in the 1995 America's Cup. Some of Altair's early clients included the Ford Motor Company, General Motors, and Chrysler. In the 1990s, it became known for its software products like HyperWorks, OptiStruct, and HyperMesh, which were often used for product development by the automotive industry. Initially, Altair started as an engineering consulting firm, but branched out into product development and computer-aided engineering (CAE) software. Since the company's outset, Scapa has served as its CEO (and now chairman). Scapa, George Christ, and Mark Kistner in Troy, Michigan. Altair Engineering was founded in 1985 by James R.

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