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.
View AirGradient
SwitzerlandIQAir is a Swiss air quality company known for its high-end air purifiers and the AirVisual line of air quality monitors. Its monitors track PM2.5, CO2 and other metrics and feed a global air quality network and app. IQAir appeals to users who want professional-grade air purification and monitoring data.
View IQAirEvery product, compared
Switch between each brand's full lineup, tap any product for specs, compatibility and pricing.
