The main difference is that AutoCAD is primarily a drafting tool to create basic geometry that represents real life, while Revit is used to create geometry that’s equipped with real-life information, hence the term building information modeling (US site), or BIM.
While there are many differences between Revit and AutoCAD, both programs are often used within the same organization. Both AutoCAD and Revit are widely used CAD software to create 2D drawings such as floor plans, elevations, details, etc.; 3D models and objects; construction documents, and rendered images.
Supports a modeling workflow, where deliverables such as drawings and schedules come directly from a single, unified model. Changes are reflected in all views of the model, and adjacent/connected elements automatically update to maintain established relationships
Supports a drafting workflow, where individual drawings are created and edited independently
Available for Windows
Available for Windows and Mac
Import and export DWG files
Native support for DWG files—supporting a legacy workflow in which there are countless DWG files
Contains all major building elements as well as manufacturer, model, cost, structure, and phase information, among others