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Weather · head to head

PurpleAir vs WSI (The Weather Company)

PurpleAir logo

PurpleAir

Weather

Real-time air quality monitoring for communities

From
$229/one-time
Rated
-
Full reviewWebsite
WSI (The Weather Company) logo

WSI (The Weather Company)

Weather

Professional weather solutions for business operations

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: PurpleAir purpleAir sensors are one-time hardware purchases rather than a subscription, priced $199 to $279 USD per unit for named models (PA-I-Indoor, PA-II, PA-II-SD), per the vendor's own store (archived, 2021).; WSI (The Weather Company) the Weather Company (which acquired WSI) states on its own site that it no longer owns The Weather Channel TV network, a separate entity from its data/API business (Internet Archive capture, 6 May 2021)
  • They diverge on capability: PurpleAir covers PM2.5 monitoring, WSI (The Weather Company) covers Aviation weather.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which PurpleAir and WSI (The Weather Company) actually diverge.

Attributes where PurpleAir and WSI (The Weather Company) differ
AttributePurpleAirWSI (The Weather Company)
Starting price$229/one-timeOn request
Pricing modelone-timequote
PlatformsWeb, Api, HardwareWeb, Api, Enterprise
Founded20151978

Identical on both: free tier (No), user rating (Not yet rated), category (Weather).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in PurpleAir

  • PM2.5 monitoring
  • Real-time map
  • Historical data
  • Community network
  • API access
  • API access
  • Home Assistant
  • Data downloads

Only in WSI (The Weather Company)

  • Aviation weather
  • Energy forecasting
  • Media solutions
  • Insurance analytics
  • Precision forecasts
  • Enterprise systems
  • Aviation networks
  • Trading platforms

Both cover

  • Web support
  • Api support

What people use each for

The jobs each tool is most often brought in to do.

PurpleAir

  • Professional Work
  • Content Creation

WSI (The Weather Company)

  • Professional Work
  • Content Creation

Both are used for professional work, content creation, on those jobs the choice comes down to price and fit rather than capability.

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

PurpleAir

  • PurpleAir sensors are one-time hardware purchases rather than a subscription, priced $199 to $279 USD per unit for named models (PA-I-Indoor, PA-II, PA-II-SD), per the vendor's own store (archived, 2021).

WSI (The Weather Company)

  • The Weather Company (which acquired WSI) states on its own site that it no longer owns The Weather Channel TV network, a separate entity from its data/API business (Internet Archive capture, 6 May 2021)

Pricing, plan by plan

PurpleAir

$229/one-time
  • Outdoor Sensor$229/one-time
    • PM2.5 monitoring
    • Cloud connectivity
    • Map access
  • Indoor Sensor$199/one-time
    • Indoor monitoring
    • WiFi enabled
    • Real-time data

WSI (The Weather Company)

On request
  • EnterpriseFree
    • Industry solutions
    • API access
    • Custom analytics

Which should you pick?

Choose PurpleAir if

  • You need pm2.5 monitoring.
  • You work on Web, Api, Hardware.
  • You also want real-time map.
PurpleAir review

Choose WSI (The Weather Company) if

  • You need aviation weather.
  • You work on Web, Api, Enterprise.
  • You also want energy forecasting.
WSI (The Weather Company) review

Questions people ask

Is PurpleAir or WSI (The Weather Company) better?
Neither clearly leads. PurpleAir starts at $229/one-time and WSI (The Weather Company) at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PurpleAir or WSI (The Weather Company)?
PurpleAir starts at $229/one-time and WSI (The Weather Company) at On request.
Does PurpleAir or WSI (The Weather Company) run on more platforms?
PurpleAir runs on Web, Api, Hardware. WSI (The Weather Company) runs on Web, Api, Enterprise.
What is PurpleAir best used for?
PurpleAir is most often used for professional work, content creation.
What can PurpleAir do that WSI (The Weather Company) cannot?
PurpleAir covers PM2.5 monitoring, Real-time map, Historical data, Community network. WSI (The Weather Company) covers Aviation weather, Energy forecasting, Media solutions, Insurance analytics. Both handle Web support, Api support.

Answered from the vendors’ own pages

WSI (The Weather Company): What does the Weather Company API free trial include?

The free trial lasts 30 days and includes 50,000 API calls per day at a rate of 100 calls per minute. This is limited to enterprise customers only.

Source
WSI (The Weather Company): What is the pricing for standard Weather Company API access?

The Standard Plan costs $500 USD per month, billed annually, and includes 1 million API calls per month with access to current conditions, forecasts, lifestyle indices, alerts, and weather imagery.

Source
WSI (The Weather Company): Do airlines get special pricing on Weather Company APIs?

Yes, major airlines are required to enroll in a custom Enterprise plan with pricing determined by agreement rather than the standard pricing tiers.

Source
WSI (The Weather Company): Are extra weather features like historical records available, and how much do they cost?

Extra features including probabilistic forecasts, lightning data, and historical records are available, but require contacting sales for custom pricing. Dedicated account management is also offered as an optional add-on.

Source
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