1. A computer-implemented method comprising: receiving, by a first computing device that is configured to respond to a particular, predefined hotword and from a second computing device that is in a vicinity of the first computing device, data indicating that the second computing device is configured to respond to the particular, predefined hotword; transmitting, to the second computing device and by the first computing device, data indicating that the first computing device is configured to respond to the particular, predefined hotword; determining a group identifier that identifies the first computing device and the second computing device; receiving, by the first computing device, audio data that corresponds to an utterance; determining that the utterance likely includes the particular, predefined hotword; in response to determining that the utterance likely includes the particular, predefined hotword, transmitting, to a server, (i) data indicating that the first computing device likely received the particular, predefined hotword, (ii) data identifying the first computing device, and (iii) the group identifier that identifies the first computing device and the second computing device; receiving, from the server, an instruction to commence speech recognition processing on the audio data; and in response to receiving the instruction to commence speech recognition processing on the audio data, processing at least a portion of the audio data using an automated speech recognizer on the first computing device.
5. The method of claim 1 , comprising: determining a confidence score that reflects a likelihood that the audio data associated with the particular, predefined hotword corresponds to the particular, predefined hotword; and in response to determining that the utterance likely includes the particular, predefined hotword, transmitting, to the server, confidence score.