A wake word is a word or phrase like "Alexa" and "OK Google." It provides an always-listening capability to a microphone-enabled device. Developers who want their own version of wake word did not have such a solution until KITT.AI released its Snowboy product, a developer-facing, always-on, offline, real-time wake word engine. It's trained on clusters of GPUs with hundreds of people's voices to provide robustness, while it works on small embedded devices like a $5 Raspberry Pi Zero. We'll demo how to use Snowboy for developing home automation or hands-free projects and we'll show how we used GPUs to build the Snowboy product.