SharkRF is a small company located in Tallinn, Estonia and also has an American address in Sheridan, Wyoming.
In July of 2016, SharkRF manufactured a digital radio internet gateway (hotspot) they called the OpenSpot.
In October of 2018, they came out with their OpenSpot2, which currently sells for around $225USD.
They also offer an open-source software called the IP Connector Protocol Server, which allows for several OpenSpot's to connect across the internet and creates a private "reflector". With this software you can create your own private network.