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Weather · head to head

PurpleAir vs Weathernews Inc

PurpleAir logo

PurpleAir

Weather

Real-time air quality monitoring for communities

From
$229/one-time
Rated
-
Full reviewWebsite
Weathernews Inc logo

Weathernews Inc

Weather

Global weather solutions for shipping

From
$600/month
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).; Weathernews Inc primarily Japan-based with headquarters in Chiba, may have lower coverage in certain regional markets outside Asia
  • They diverge on capability: PurpleAir covers PM2.5 monitoring, Weathernews Inc covers Optimum ship routing.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which PurpleAir and Weathernews Inc actually diverge.

Attributes where PurpleAir and Weathernews Inc differ
AttributePurpleAirWeathernews Inc
Starting price$229/one-time$600/month
Pricing modelone-timesubscription
PlatformsWeb, Api, HardwareWeb, Api, Mobile
Founded20151986

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 Weathernews Inc

  • Optimum ship routing
  • Weather forecasting
  • Voyage planning
  • Risk assessment
  • Fleet management
  • Bridge systems
  • Navigation software
  • Mobile support

Both cover

  • Web support
  • Api support

What people use each for

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

PurpleAir

  • Professional Worknot Weathernews Inc
  • Content Creationnot Weathernews Inc

Weathernews Inc

  • Optimizing cargo ship navigation with real-time maritime weather forecastsnot PurpleAir
  • Supporting offshore wind farm operations with 24-hour weather monitoringnot PurpleAir
  • Providing exclusive wind data for commercial drone flight planningnot PurpleAir
  • Routing emergency medical helicopters in Japan with weather intelligencenot PurpleAir

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).

Weathernews Inc

  • Primarily Japan-based with headquarters in Chiba, may have lower coverage in certain regional markets outside Asia
  • Marine weather data and aviation services are newer offerings compared to core weather forecasting capabilities
  • Competition from established European weather services in maritime sector

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

Weathernews Inc

$600/month
  • Optimum Routing$1500/month
    • Weather routing
    • Voyage optimization
    • 24/7 support

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 Weathernews Inc if

  • You need optimum ship routing.
  • You work on Web, Api, Mobile.
  • You also want weather forecasting.
Weathernews Inc review

Questions people ask

Is PurpleAir or Weathernews Inc better?
Neither clearly leads. PurpleAir starts at $229/one-time and Weathernews Inc at $600/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PurpleAir or Weathernews Inc?
PurpleAir starts at $229/one-time and Weathernews Inc at $600/month.
Does PurpleAir or Weathernews Inc run on more platforms?
PurpleAir runs on Web, Api, Hardware. Weathernews Inc runs on Web, Api, Mobile.
What is PurpleAir best used for?
PurpleAir is most often used for professional work, content creation. Of those, professional work and content creation are not what Weathernews Inc is typically brought in for.
What can PurpleAir do that Weathernews Inc cannot?
PurpleAir covers PM2.5 monitoring, Real-time map, Historical data, Community network. Weathernews Inc covers Optimum ship routing, Weather forecasting, Voyage planning, Risk assessment. Both handle Web support, Api support.

Answered from the vendors’ own pages

Weathernews Inc: Does Weathernews provide marine weather data?

Yes. Weathernews provides wind, wave, current, sea ice, and typhoon information for global marine operations through its SeaNavigator platform, which launched SeaNavigator for Master in December 2025 with AI-assisted operations support.

Source
Weathernews Inc: What marine weather products does Weathernews offer?

Weathernews offers SeaNavigator Marine Weather Service, SeaNavigator for Master with conversational AI for captains, and marine data for Middle East waters made available free of charge in April 2026.

Source
Weathernews Inc: Does Weathernews serve the aviation industry?

Yes. Weathernews expanded aviation services with the December 2025 launch of SkyAviators, offering Global Aviation Weather Intelligence with turbulence risk assessments and takeoff/landing feasibility judgments for airports worldwide.

Source
Weathernews Inc: What was Weathernews founded in response to?

Weathernews was founded on June 11, 1986 by Hiro Ishibashi in response to a tragic maritime disaster where a cargo vessel sank at the port of Onahama, Japan with 15 crew members lost, demonstrating the need for better weather information.

Source
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