
BoothHQ
7.8#3 in exhibitor management softwareFrom $99 a monthFree planAndroidiOSWebAPI
Visit
BoothHQ suits trade show and conference organizers, including teams running large-scale shows or multiple events. Its free tier is limited to one event and 50 attendees, while Pro supports unlimited events and up to 2,500 attendees per event.
You want what its maker publishes above — check its page for the details.