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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ChinaZemismart is a Chinese smart home manufacturer known for curtain and blind motors, wall switches, sensors and energy meters built on the Tuya platform. Its catalogue spans Zigbee, Wi-Fi, Bluetooth and Matter over Thread, and the brand is popular with Home Assistant users because most of its Zigbee devices are supported by Zigbee2MQTT. Products are sold through its own store and marketplaces rather than mainstream retail.
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