OpenAQ alternatives

3 tools to consider instead of OpenAQ, shown against it.

OpenAQ PurpleAir IQAir Aclima
Vendor OpenAQ (nonprofit) PurpleAir, Inc. IQAir Aclima, Inc.
Pricing model Open source + paid options Free tier + paid plans Subscription Quote only
Free tier Yes Yes Yes No
Deployment Cloud Cloud Cloud Cloud
Open source Yes (MIT) No No No
Best for Researchers, journalists and developers who need one free, global API for air quality data instead of stitching together national sources. Communities, schools and individuals wanting an affordable, real-time local air quality readout, with awareness that readings need calibration against regulatory monitors. Consumers and businesses wanting a branded indoor/outdoor monitor plus access to IQAir's global air quality map. City, state and utility agencies needing hyperlocal pollution data for regulatory and environmental-justice programs.
Pricing

Free public API and open data archives; funded by grants and donations, not subscriptions.

Pricing has not been verified yet — see the vendor's site.

Sensor map and API access are free; revenue comes from one-time hardware purchases rather than subscriptions.

Pricing has not been verified yet — see the vendor's site.

Free AirVisual app and map; monitors are one-time hardware purchases, with business data licensing sold separately.

AirVisual Pro (indoor monitor) $329.99
AirVisual Outdoor monitor $299.99

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Custom contracts with government agencies, utilities and research partners; no public pricing.

Pricing has not been verified yet — see the vendor's site.

Features
  • Aggregated government and low-cost sensor data
  • 100+ countries, tens of thousands of stations
  • Free public REST API
  • Bulk historical data archives
  • PM2.5, PM10, NO2, SO2, O3, CO coverage
  • Per-station metadata on source and instrument type
  • Open-source platform code
  • Outdoor and indoor PM sensors
  • Free real-time public sensor map
  • Public API for sensor data
  • Temperature and humidity readings
  • EPA PM2.5 correction factor support
  • Wi-Fi connected, cloud-uploaded readings
  • Wide embedding in fire and air-quality apps
  • Indoor and outdoor PM2.5/PM10 monitors
  • Free AirVisual app and public map
  • CO2, temperature and humidity sensing
  • Annual World Air Quality Report
  • Business air-quality data licensing
  • Air purifier product line
  • Historical and real-time trend charts
  • Mobile sensor-equipped vehicle fleets
  • Fixed monitoring stations
  • Block-by-block pollution mapping
  • Multi-pollutant sensing (NO2, PM2.5, black carbon, GHGs)
  • Environmental-justice exposure analytics
  • Regulatory reporting support (e.g. AB 617)
  • Cloud dashboards and data delivery

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