Every ship or ship's component is made by a company. These are the current companies in Horizons, with a brief description. (This will be expanded later to include defining characteristics of each company)

Newport Construction Industries - Builder of many Alliance starships (Horizons, Dominator, Space Dock)

Twin Star Lines - Stellar Cruise Lines

Sorin Aerospace - (Most of the combat ships)

I-Tech Industrial - (Transports)

Zerran Communications - (COMSAT)

Perkin Capitol - (Maurader)

Interstellar - (Stations)

Zerion Industries - (Repair Drones)

For information on how you can add your own companies to your modules, see Companies