Datacircle

Tomorrow.io pricing and alternatives: air quality API

Tomorrow.io's sitellms.txtBest air quality API in 2026: pricing compared

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50% complete: 3 of the 6 key fields we checkSee the 6 fields
Contact usWe rank 94 plans by price. OpenWeather's £370 monthly plan is the cheapest paid plan per 1,000 places: $0.00049.WeatherAPI.com, Open-Meteo and Weatherbit are the best air quality API providers in our benchmark.
Plan: Enterprise Tomorrow.io's only plan
Call: POST /v4/timelines Tomorrow.io's only call for this API
API: Air quality API one of Tomorrow.io's 3 APIs

About this item

  • Freshness. We don't know how fresh this plan's data is.
  • 3 of the 6 key fields we check. US AQI, Particles, Gases.
  • No public price. You ask Tomorrow.io for one.
  • One call. You send fields to POST /v4/timelines. You set the Accept-Encoding header to "deflate, gzip, br". You can also send location, units, timesteps, startTime, endTime, timezone and dailyStartHour. The call returns the air quality at the place now.
  • Anyone can get it. Keep data: with conditions. Use data: with conditions.

Tomorrow.io: air quality API alternatives

We list other providers' plans with no public price.

This planTomorrow.io, contact usWeatherAPI.com, contact usWeatherbit, contact us, Enterprise, GET /v2.0/forecast/airqualityReefAPI, contact usIQAir, contact us, Enterprise, GET /v2/nearest_cityMeteomatics, contact us
Completeness50%50%50%50%50%33%
Billingcontactcontactcontactcontactcontactcontact
Freshnessunknownliveunknownliveunknownunknown
Who can get itanyoneanyoneanyoneanyoneanyoneBusinesses: its Talk to an expert form asks for a "Business e-mail"

Every air quality API provider we score, ranked

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-30.

  1. docs.tomorrow.io/reference/data-layers-air
  2. docs.tomorrow.io/reference/post-timelines
  3. docs.tomorrow.io/reference/rate-limiting
  4. docs.tomorrow.io/reference/timeline-overview
  5. tomorrow.io/terms-of-service/
  6. tomorrow.io/weather-api/

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • US AQI
  • European AQI, not in the answer
  • Particles
  • Gases
  • Pollen, not in the answer
  • UV index, not in the answer
Price
Billingcontact
Charges
Also pays forfrom the same budget: Realtime Weather · Weather Forecast
In their words
Their pitchUnderstand what precautions to take with respect to pollution, meet EPA standard regulations, and plan your outdoor activity.
Data
Keep data"store or otherwise collect or copy the unaltered Datafeed, unless otherwise expressly provided for in the Order or for permitted evaluation of DaaS, in which case Datafeed may only be stored for the duration of the Initial Term [...]" (terms, Restrictions).
Use data"Paid Solution offerings may be used for Subscriber's internal business purposes or, as specified in an Order, integrated into Subscriber proprietary commercial applications. Commercial use is strictly prohibited in the case of evaluation, proof of concept, or in connection with self-generated accounts originated on Company's website [...] The Solution may not be distributed, shared, or offered on a standalone basis" (terms, Permitted Use), "any portion of the Solution that incorporates and presents Datafeed shall prominently display the message "Powered by Tomorrow.io" in a legible manner near such data or any information derived from it" (terms, Attribution), "Subscriber acknowledges and agrees not to engage, directly or indirectly, or facilitate engagement by a third party, in the following prohibited activities: [...] Use the Solution to develop, or create, or permit others to develop or create, a product or service in any way similar or competitive to the Solution, as solely determined by Company, Offer any portion or all of the Solution to any third parties [...] including but not limited to reselling, licensing, renting, leasing, transferring, lending, timesharing, assigning or redistributing it or any part thereof or generating revenue thereform. [...] Use robots, crawlers and similar applications to scrape, harvest, collect or compile content or data from or through the Solution, Publish or disclose the results of any benchmark tests performed with respect to the Solution or otherwise use any testing results related to the Solution for commercial, competitive, or other purposes" (terms, Restrictions).
Rate limit
Batch1
The call
You sendfields, Accept-Encoding header "deflate, gzip, br". Optional: location, units, timesteps, startTime, endTime, timezone, dailyStartHour
MethodPOST
Path/v4/timelines
About the plan
PlanEnterprise
Who can get itanyone
The 17 fields the plan's answer can hold

timestep, start time, end time, interval start time, PM2.5, PM10, ozone, nitrogen dioxide, carbon monoxide, sulfur dioxide, China MEP AQI, China MEP primary pollutant, China MEP health concern, US AQI, US AQI primary pollutant, US AQI health concern, wildfire smoke index

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