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Software · head to head

NAPA vs Weathernews Inc

NAPA logo

NAPA

Software

Ship design and operational excellence

From
$5000/year
Rated
-
Full reviewWebsite
Weathernews Inc logo

Weathernews Inc

Software

Global weather solutions for shipping

From
$600/month
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: NAPA the Internet Archive's capture of NAPA's homepage on 1 January 2020 named six distinct maritime software products, NAPA Loading Computer, NAPA Emergency Computer, NAPA Logbook, NAPA Fleet Intelligence, NAPA Voyage Optimization and ClassNK-NAPA GREEN, with no price figure published for any.; Weathernews Inc primarily Japan-based with headquarters in Chiba, may have lower coverage in certain regional markets outside Asia
  • They diverge on capability: NAPA covers Ship design, Weathernews Inc covers Optimum ship routing.

Where they differ

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

Attributes where NAPA and Weathernews Inc differ
AttributeNAPAWeathernews Inc
Starting price$5000/year$600/month
Pricing modelone-timesubscription
PlatformsWindows, WebWeb, Api, Mobile
Founded19891986

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

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 NAPA

  • Ship design
  • Stability calculation
  • Voyage optimization
  • Performance monitoring
  • CAD systems
  • Weather routing
  • Windows support

Only in Weathernews Inc

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

Both cover

  • Fleet management
  • Web support

Where each one falls short

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

NAPA

  • The Internet Archive's capture of NAPA's homepage on 1 January 2020 named six distinct maritime software products, NAPA Loading Computer, NAPA Emergency Computer, NAPA Logbook, NAPA Fleet Intelligence, NAPA Voyage Optimization and ClassNK-NAPA GREEN, with no price figure published for any.

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

NAPA

$5000/year
  • Fleet Intelligence$15000/year
    • Voyage optimization
    • Performance monitoring
    • Analytics

Weathernews Inc

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

Which should you pick?

Choose NAPA if

  • You need ship design.
  • You work on Windows, Web.
  • You also want stability calculation.
NAPA 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 NAPA or Weathernews Inc better?
Neither clearly leads. NAPA starts at $5000/year and Weathernews Inc at $600/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, NAPA or Weathernews Inc?
NAPA starts at $5000/year and Weathernews Inc at $600/month.
Does NAPA or Weathernews Inc run on more platforms?
NAPA runs on Windows, Web. Weathernews Inc runs on Web, Api, Mobile.
What can NAPA do that Weathernews Inc cannot?
NAPA covers Ship design, Stability calculation, Voyage optimization, Performance monitoring. Weathernews Inc covers Optimum ship routing, Weather forecasting, Voyage planning, Risk assessment. Both handle Fleet management, Web 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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