CSI Link is an external application for Autodesk® Revit® that enables users to transfer the analytical models from Revit to CSI SAFE and CSI ETABS for structural analysis. The goal is to eliminate the need for any extra modeling work in the target software meaning once the export file is generated, the structural model from the CSI application will be open and ready to run the analysis.
To achieve this goal the CSI Link add-on in Revit must be able to export all required data for structural analysis in addition to the structural model. This information includes Design codes /material specification/load patterns, load cases, and load combinations.

Below table compare the features of the CSI Link (free version)  with CSI Link plus (commercial version)

	CSI Link	CSI Link plus
Export Grids	Yes	Yes
Export Slabs	Yes	Yes
Export Walls	Yes	Yes
Export Columns	Yes	Yes
Export Beams and Bracings	Yes	Yes
Cross-section mapping	Yes	Yes
Export custom cross-sections	Yes	Yes
Export column and beam End-Release	Yes	Yes
Export Loads	Yes	Yes
Export load combination and load cases	Yes	Yes
Export Links	No	Yes
Export boundary conditions	Yes	Yes
Generate design strips	No	Yes
Typical floors	No	Yes
Auto adjust analytical model	Yes	Yes
Model size	Limited to 100 nodes	Unlimited

Note: This app uses a custom installer (and not the standard App Store installer).