ARI-Advanced Robotics Inc. This is the primary maker of robots within the sector. There are three other competitors but ARI controls the lions share of the market.
ARI has had a long and somewhat checkered history. It pioneered the use of life like Androids which initially was successful but when a group of terrorists got inside the programming of the 500 series of androids and making them killers. The companies reputation suffered for a period of years. The 500 series of lifelike androids was stopped and the company went back to making more basic robots.
ARI has offices on all planets with a tech level A or better except those who have prohibitions against robots.