Plum is a provider of smart light dimmers for luxury homes. The company designs and builds the Plum Lightpad that allows users to remotely control lighting with the smartphone, voice, and fingertips. Its home automation devices connect directly to Wi-Fi, work with Amazon Alexa and the Google Assistant, multi-way switches and multi-gang installations, and feature presence detection, multi-touch interface, built-in energy metering displays, and free iOS app.