Glass-Door.US is an E-commerce website of Otto & Sohn USA Inc. Otto & Sohn USA Inc. was founded in 2015 by Sven Otto in Miami, Florida and has specialized in selling doors since 2018 with the idea to revolutionize the American market with high quality, elegant sliding doors from Europe. Due to the rapid success, our portfolio has been expanded with numerous other products such as swing doors, pocket doors and hinged doors. Nevertheless, we continue to expand our product line to offer our customers a wide range of innovative models.