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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South KoreaWinix is a South Korean appliance manufacturer founded in 1973 and headquartered in Siheung, best known outside Korea for its air purifiers. Its range pairs a washable pre-filter, an activated carbon layer and a True HEPA filter with the brand's own PlasmaWave ionization stage, which can be switched off. The connected models add Wi-Fi with the Winix Smart app, air quality and light sensors driving Auto and Sleep modes, and support for Amazon Alexa and Google Home.
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