Adaptive network communication techniques are described. In one or more implementations, a determination is made by a client device that a request, which is to be communicated to a content provider via a network, is for content that is accessible via the content provider upon authentication of credentials transmitted to the content provider from the client device. Responsive to the determination, an initial communication is formed by the client device for receipt by the content provider that includes the credentials without waiting for the content provider to request the credentials from the client device.