Flair 3D is a cloud-based tool for construction and real estate industry: designers, builders, owners, operators and facility managers as well as O&M application developers and IoT companies. It features an online 3D Viewer for digital models of buildings and infrastructure known as Digital Twins. The platform gives access to the multi-disciplinary models and associated asset information like location, spaces, rooms, equipment manufacturer, type etc. It provides simple 4D simulation tools, possibility to compare the model and laser scan data side-by-side and enables live performance data monitoring thanks to its spatial IoT sensors visualization capabilities. Flair3D serves as a centralized location for BIM models, CAD drawings and technical information, and its goal is to improve communication, enhance collaboration, reduce data search and response time, maximize efficiency and minimize cost of design, construction and operation.