Service nodes are the community-operated nodes that make up the decentralised Oxen Network. There are currently over 2,200 nodes in the network. These service nodes are responsible for storing and routing messages sent on Session. Learn more here.
Session will soon upgrade from the Oxen Network to the new Session Network. During this process, Oxen Service Nodes will migrate to the new network to become Session Nodes. The network will remain decentralised, and Session Nodes will perform the same tasks as Oxen Service Nodes.