If you're looking for a Flume alternative, Sense is worth a serious look. This home energy monitoring system uses AI technology to monitor and identify real-time energy usage so you can better understand and control your energy consumption. It can track real-time energy usage, detect devices, show historical usage and track bills. Sense can help you cut energy use and your carbon footprint, and it works with a variety of devices and IoT-enabled meters.
Another alternative worth considering is Tempest. Although it's geared toward offering precise, real-time weather observations and forecasts, its abilities can be useful if you want to marry weather data with other smart home systems. Tempest offers point-specific weather data and works with common smart home services like Google Home and Amazon Alexa, so it can be a good foundation for your smart home.