DOOR (legally Latch, rebranded in August 2025) sells smart access control and building technology to the multifamily rental market in the U.S. and Canada. The core product is a cloud-based SaaS platform that manages smart locks, intercoms, readers, and other connected devices within apartment buildings. Property managers use the platform to remotely control access permissions and manage building operations, while residents use the DOOR app to unlock doors, grant guest access, and control smart home devices. Hardware is sold through third-party channel partners who market, sell, and install devices, while customers license the SaaS platform directly from DOOR. The key economic driver is the number of units connected to the platform, since each connected unit generates recurring SaaS subscription revenue — hardware sales serve as the entry point that draws customers into the ecosystem. DOOR also operates HelloTech, a platform connecting independent technicians with residents and property managers for on-demand home services, and Door Property Management, a Boston-area property management business acquired in 2024. DOOR's growth strategy focuses on expanding connected units by deepening penetration in North American multifamily, broadening the platform beyond access control toward a comprehensive building operating system, and growing its professional services and installation network to support both new construction and retrofit deployments.