Providing origin insight via Session Traversal Utilities for Network Address Translation (STUN) messages for web applications, and related methods, systems, and computer-readable media are disclosed herein. In one embodiment, a method for providing origin insight for web applications via STUN messages comprises determining an origin identifier for a web application attempting to send a STUN message to a STUN server; generating the STUN message incorporating the origin identifier for the web application; and transmitting the STUN message to the STUN server. In another embodiment, a method for providing STUN services to web applications comprises receiving a STUN message from a web client, and extracting an origin identifier for a web application. Provision of a STUN service to the web application is determined based on the origin identifier. If the STUN service should not be provided, the STUN message is rejected or disregarded; otherwise the STUN message is processed.