A modular virtualization platform is provided for secured communications between a user device and an application server. A client-side computing device performs secured communications during a virtual session with an application server across a network. The client-side computing device loads a virtual machine client; and selects a remote module to serve as a virtualization server for the virtual session based on one or more performance factors. The virtual session is established with the selected module, and secured communications can occur between the client-side computing device and the application server via the virtual session of the selected module. The performance factors can be collected from a plurality of modules using a peer-to-peer gossip-based state notification process. A route list preferably stores the performance factors for a plurality of modules. The route list can contain pointers to a plurality of remote modules in a plurality of virtualization platforms, to increase reliability.