Salem, Oregon, assembled its own using OpenALPR and an on-prem server. There are plenty of reasonable criticisms of that approach too, but it's currently the farthest thing from Flock on the municipal mass-surveillance tech scale bar that I'm aware of.

"The system does not utilize facial recognition and does not have automated functions, such as automatically running license plates through the state Department of Motor Vehicles (DMV) or Law Enforcement Data System (LEDS) databases. All license plates must still be verified by an investigator and then individually queried through the appropriate database."

This sounds like a lot more than your average flock installation at a local PD

https://salem.legistar.com/LegislationDetail.aspx?ID=7375982...

OpenALPR is not open source despite the open name, sigh