It depends, but 100 devices should work without issues.
The amount of devices you can reliably run in a single ActyxOS swarm depends on a large number of factors, including the local-area network setup, the devices themselves and the apps running on them.
Given current production systems and internal benchmarks, 100 devices should work without any issues.
You need to connect 1'000s of edge devices?
Please get in touch; we would love to hear about your use-case and figure out how to make it work with ActyxOS.