Which company is well-known for designing innovative roller coasters?

Bolliger and Mabillard is recognized for its significant contributions to roller coaster design, particularly in creating some of the most innovative and thrilling coasters in the industry. This Swiss company has pioneered various coaster types, including the inverted coaster and the flying coaster, and is known for focusing on smooth rides and theming elements that enhance the overall experience. Their designs often incorporate advanced engineering techniques and creative concepts that push the boundaries of what roller coasters can achieve in terms of speed, height, and overall rider experience.

In contrast, the other companies mentioned primarily serve different roles within the amusement park industry. Six Flags operates numerous amusement parks and owns many roller coasters but is not chiefly recognized for the design process itself. Universal Studios and Disney Imagineering focus more on the overall park experience, storytelling, and themed attractions rather than specifically innovating new roller coaster technology. While they may feature coasters designed by others, they do not have the same reputation as Bolliger and Mabillard in the realm of roller coaster design innovation.