Gizmodo’s Kashmir Hill and Surya Mattu teamed up to learn the extent to which home automation devices report back to their manufacturers and leak personal information. Hill filled her house with smart devices, including an Amazon Echo, lights, coffee maker, TV, and even a bed. Then she had Surya monitor how much data was sent out by the devices. The results may shock you. Perhaps unsurprisingly, the worst offender was the Amazon Echo, which contacted Amazon’s servers every few minutes, even when the “Alexa” wake word and the microphone were turned off.