Which company is better?
Black Mesa, Aperture Science, or TF Industries?
Black Mesa is an American research corporation whose headquarters are located in the Black Mesa Research Facility, in the New Mexico desert.
Black Mesa is apparently helmed by the United States government, as the Great Seal can be seen on the ground of several lobbies of the Black Mesa Research Facility, and the United States Nuclear Regulatory Commission, as seen on several comlink status screens.
Aperture Science, Inc. is a United States-based scientific research corporation appearing in Portal and Portal 2, as well as other sources.
Its main facility is the Aperture Science Enrichment Center, located in Upper Michigan, with at least one other base of operations in Cleveland, Ohio. Originally a shower curtain manufacturer named Aperture Fixtures, it evolved over the course of half a century into an experimental physics research institution and a bitter rival of Black Mesa.
Aperture Laboratories is also used as a trade name by Aperture Science for most of its products, as Aperture Science dba Aperture Laboratories. Aperture Science Innovators was the brand used before the 1970s.
TF Industries is a mysterious company based in Washington, USA that is "Devoted to the highest level of craftsmanship and personal security". Headed by the Administrator, they specialize in the very latest in military technology, selling all manner of deadly, cutting-edge devices to prospective buyers. They also run the popular 'Buildables' line of Engineering products.