Arcol is a real-time collaborative BIM tool in the AEC space that aims to help architects and engineers streamline the design process for better buildings. The company's software is designed to be built for the web, multiplayer, and highly performant, with a specialized 3D engine capable of handling complex geometry transformations. Arcol has gained backing from Figma's founding team and early investors, and is utilizing WebAssembly and Web Workers to achieve its ambitious goals. The company is currently in closed alpha and plans to open it up soon, with a waitlist of over 13,000 people eager to try the software.