Well you have to check what kind of files Revit imports. Then if is just the model or you want also texture/materials.
Basically Softimage exports OBJ , IGES-Nurbs based format if you modelled in Nurbs in Softimage and don’t want to convert to polys and FBX. I think the last version also exports Alembic. There are also plugins(addoons in softimage) made by people that can export. But you’ll have to find and download them.
Edit: it seems that Sketchup can be read by Revit so export in Obj or FBX open in Freeware Sketchup and save in its file format. That should work.