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Maritime · head to head

NAPA vs StormGlass

NAPA logo

NAPA

Maritime

Ship design and operational excellence

From
$5000/year
Rated
-
Full reviewWebsite
StormGlass logo

StormGlass

Maritime

Global weather data API for maritime

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only StormGlass has a free tier, so it costs nothing to try first.
  • Each has a real cost: NAPA no pricing information published on website; StormGlass the free tier allows 10 API requests per day and is not licensed for commercial use
  • They diverge on capability: NAPA covers Ship design, StormGlass covers Marine weather data.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which NAPA and StormGlass actually diverge.

Attributes where NAPA and StormGlass differ
AttributeNAPAStormGlass
Starting price$5000/yearFree
Pricing modelone-timefreemium
Free tierNoYes
PlatformsWindows, WebApi
Founded19892017

Identical on both: user rating (Not yet rated), category (Maritime).

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
  • Fleet management
  • Weather routing
  • Windows support

Only in StormGlass

  • Marine weather data
  • Wave forecasts
  • Tide data
  • Historical weather
  • REST API
  • Webhooks
  • SDKs
  • Api support

What people use each for

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

NAPA

  • Designing vessel hulls with 3D hydrostatics and stability analysisnot StormGlass
  • Monitoring fleet safety and performance across global operationsnot StormGlass
  • Optimizing vessel fuel consumption to reduce emissionsnot StormGlass
  • Digitalizing ship safety management and compliance logbooksnot StormGlass

StormGlass

  • Pulling marine weather and sea state forecasts into a vessel routing or planning toolnot NAPA
  • Adding tide, wave and wind data to a maritime or coastal applicationnot NAPA

Where each one falls short

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

NAPA

  • No pricing information published on website

StormGlass

  • The free tier allows 10 API requests per day and is not licensed for commercial use
  • Commercial use and any support at all start at the Medium plan, 49 euros a month
  • The Small plan at 19 euros a month has no support and no commercial licence
  • Request allowances are daily rather than monthly, so a burst of traffic cannot borrow against a quiet week

Pricing, plan by plan

NAPA

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

StormGlass

Free
  • FreeFree
    • 10 requests per day
    • All weather parameters
    • Not for commercial use
  • Small$19/month
    • 500 requests per day
    • All weather parameters
    • 10% annual discount available
  • Medium$49/month
    • 5000 requests per day
    • All weather parameters
    • Full support
  • Large$129/month
    • 25000 requests per day
    • All weather parameters
    • Full 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 StormGlass if

  • You need marine weather data.
  • You want to start without paying.
  • You work on Api.
  • You also want wave forecasts.
StormGlass review

Questions people ask

Is NAPA or StormGlass better?
Neither clearly leads. NAPA starts at $5000/year and StormGlass at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, NAPA or StormGlass?
StormGlass has a free tier; the other does not. Paid plans start at $5000/year for NAPA and Free for StormGlass.
Does NAPA or StormGlass run on more platforms?
NAPA runs on Windows, Web. StormGlass runs on Api.
Can I use StormGlass for free?
Yes. StormGlass has a free tier, so you can try it without paying. NAPA starts at $5000/year.
What is NAPA best used for?
NAPA is most often used for designing vessel hulls with 3d hydrostatics and stability analysis, monitoring fleet safety and performance across global operations, optimizing vessel fuel consumption to reduce emissions, digitalizing ship safety management and compliance logbooks. Of those, designing vessel hulls with 3d hydrostatics and stability analysis and monitoring fleet safety and performance across global operations are not what StormGlass is typically brought in for.
What can NAPA do that StormGlass cannot?
NAPA covers Ship design, Stability calculation, Voyage optimization, Performance monitoring. StormGlass covers Marine weather data, Wave forecasts, Tide data, Historical weather.

Answered from the vendors’ own pages

NAPA: Where is NAPA's pricing information?

NAPA's website does not display pricing details. The site focuses on product features and case studies. Organizations seeking pricing information would need to contact the company directly through available contact channels.

Source
StormGlass: Is there a free tier available?

Yes, Stormglass offers a free plan with 10 API requests per day, including all weather parameters, but it is not permitted for commercial use.

Source
StormGlass: What does the Medium plan include?

The Medium plan costs 49 EUR per month and includes 5000 daily requests, all weather parameters, and full support for commercial use.

Source
StormGlass: Is annual billing available?

Yes, a 10% discount is available when paying annually on Small, Medium, and Large plans.

Source
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