ThailandAirGradient builds open-source indoor and outdoor air quality monitors that track PM2.5, CO2, temperature, humidity and other pollutants. The company is known for its open hardware and firmware, letting users build, repair and integrate the monitors with platforms like Home Assistant and its own dashboard. AirGradient appeals to people who want transparent, data-driven air quality monitoring rather than a closed black box.
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United StatesEmporia is a Colorado-based energy technology company that builds whole-home energy monitors, smart plugs, Level 2 EV chargers and home battery systems. Its Vue energy monitors clamp onto the mains and up to 16 branch circuits to report consumption second by second, with solar net metering and no subscription. The app adds cost tracking, time-of-use rates and load management, and the devices work with Alexa and Google Home.
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