AirGradient is an open-source air quality monitoring brand focused on making accurate, affordable monitoring accessible worldwide. Its mission is to help people better protect themselves from air pollution by expanding access to reliable local data. Thousands of citizens have deployed its monitors, and the company shares monitor designs openly so others can build on them.

Its product range includes indoor, outdoor, and portable air quality monitors, including the AirGradient ONE and Open Air models. AirGradient also provides solutions for healthy buildings, cities and communities, schools, and research, alongside resources such as a GO IAQS Score Simulator and educational toolkits. Users can view and analyze readings through the subscription-free AirGradient Dashboard, which offers real-time data, alerts, historical records, export options, calibration features, and daily or weekly reports. Outdoor readings can appear on the AirGradient Map, while the free mobile app provides access to personal and public monitor data. The open systems can also send data to other platforms, including Home Assistant and Homey.