Some of the differing capabilities of the various platforms are:
Gamification
On-Line Registration
Payment Integration
Networking
Lead collection
Analytics
Live Audience polling
Virtual Tours and Scenic sets (Very cost-prohibitive and heavy internet solutions)
For "Collaborative" sessions, we work with various Video conferencing apps such as ZOOM, Teams, Bluejeans. Some of these do have a whiteboard feature.s and have also worked with third-party whiteboard apps like "Jamboard."