Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for persisting state of a streaming application are disclosed. In one aspect, a method includes the actions of receiving data indicating interaction with third-party content that is displayed with first-party content at a client device. The interaction with the third-party content initiates an application request for a streaming version of an application (“streaming application”). The actions further include generating a representation of the streaming application in response to the interaction with the third-party content at the client device. The actions further include receiving data indicating a user interaction with the representation of the streaming application at the client device. The actions further include generating and storing data indicating a first state of the streaming application at a first time based on the user interaction with the representation of the streaming application.