pfSense is a firewall and routing platform whose project source code is distributed under the Apache 2.0 open source licence. The project is developed and hosted by Rubicon Communications LLC, trading as Netgate. Netgate also sells pfSense Plus, a commercial edition, together with TNSR routing software, its own appliances and support subscriptions. The software is installed on the customer's own hardware, in a virtual machine or on a Netgate appliance, so the configuration stays on the customer's side.
Netgate is headquartered in Austin, Texas, and its company page does not name outside investors or a parent company. As a US company it is subject to the US CLOUD Act, which can require disclosure of data a provider controls, so this matters for support relationships and any service Netgate operates for a customer. The core firewall runs on equipment the customer controls. For a European organisation the source code can be inspected and used, while the commercial Plus edition and support come from a US company.