It is a FAQ from new admins and some users on what should they use or install for their specific workflow: OpenBridge Modeler or OpenBridge Designer? While OpenBridge Modeler is a 3D parametric modeling software for bridges, OpenBridge Designer is a single product that creates interoperable physical and analytical models.

So, what are the differences? First, OpenBridge Modeler is included inside OpenBridge Designer, therefore, users can achieve more with OpenBridge Designer. Though, sometimes, it is not what's necessary as OpenBridge Modeler already integrates with civil design applications and leverages enhanced visualization for creating 3D bridge models within the context of an overall transportation project. 

3D Bridge Design, Parametric Modeling, and Analysis Software - OpenBridge Modeler (bentley.com)

OpenBridge Designer consolidates the modeling capabilities of OpenBridge Modeler and the analysis and design features of LEAP Bridge Concrete, LEAP Bridge Steel, and RM Bridge Enterprise. OpenBridge Designer was created to meet the design and construction needs of all types of bridges and can be utilized throughout the lifecycle of both steel and concrete bridges. 

Bridge Design, Modeling and Analysis Software | OpenBridge | Bentley