MyACCT is running on Debian 9
Main software used:
MariaDB, Acell-ppp, freeradius, nftables, Bind DNS, Quagga
Software can be updated and upgraded on the fly with debian package manager
Packages are configurable either through web or from console

Seemless migration from other softrouter DB's
There are 3 license levels:
Free - 255 IPs - no backups and no support.
Standart - up to 10000 IPs per router. Support and backups included.
Extended - Standart + up to 10000 IPs per router + Billing software for centralized management and accounting.