A few years ago I met a bit bitdefender.
Leaving aside the antivirus part.
You can control mobile devices of iOS and Android users, block websites, lock screen and remote wipe.
Also in windows you can block websites etc.
For the corporate version, the licenses are for devices and have a centralized administration console, you can select cloud at no cost or on-premise.
For something so small I also think a family or small business license can work but in this case you should install the additional parental control application.