Which company is known for having over 20% market share in 3D printing and is based in Brooklyn, New York?

MakerBot is recognized for having over 20% market share in the 3D printing industry and is headquartered in Brooklyn, New York. The company has made significant strides in the 3D printing space, particularly in the realm of consumer and educational 3D printers. Its focus on user-friendly technology and its early entry into the market have contributed to its strong market presence.

The other companies listed, while significant players in the 3D printing market, have different market focuses or headquarters that do not align with the criteria specified in the question. For example, Formlabs specializes in SLA (stereolithography) technologies and is based in Massachusetts, Stratasys, which has a strong presence in industrial and professional 3D printing solutions, is based in Minnesota, and 3D Systems, one of the original innovators in 3D printing, has its headquarters in South Carolina. These factors differentiate MakerBot and clarify why it stands out in this context.