IcePanel is a collaborative diagramming and modelling tool for software architecture. It helps teams establish a consistent and shared language of their systems, accelerating the technical design process. Features include architecture design workflow, modelling to keep diagrams in sync, views tailored for different audiences, ability to draft future ideas, gain feedback, iterate, fork models, merge designs, create phased release designs, collaborate with stakeholders, and dynamic views overlaying details. The company emphasizes simplicity in the technical design process to keep architects' work less complex and more efficient. IcePanel supports C4 models to help teams document, refine, and validate architecture in a structured way. It is browser-based and designed specifically for architects.