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Maritime · head to head

NAPA Fleet Intelligence vs StormGlass

NAPA Fleet Intelligence logo

NAPA Fleet Intelligence

Maritime

Vessel performance, emissions compliance and voyage optimisation built on NAPA hydrodynamic ship models

From
On request
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 Fleet Intelligence model-derived performance from AIS and noon reports is an estimate, so it supports fleet screening and dispute evidence better than fine-grained optimisation of a single ship.; StormGlass the free tier allows 10 API requests per day and is not licensed for commercial use
  • They diverge on capability: NAPA Fleet Intelligence covers NAPA Performance Model, StormGlass covers Marine weather data.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which NAPA Fleet Intelligence and StormGlass actually diverge.

Attributes where NAPA Fleet Intelligence and StormGlass differ
AttributeNAPA Fleet IntelligenceStormGlass
Starting priceOn requestFree
Pricing modelquotefreemium
Free tierNoYes
PlatformsWeb, CloudApi
FoundedUnknown2017

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 Fleet Intelligence

  • NAPA Performance Model
  • AIS-based analysis
  • Voyage optimisation
  • Emissions reporting
  • Hull and propeller performance
  • Fleet benchmarking
  • Onboard integration
  • Passenger ship modules

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 Fleet Intelligence

  • A charterer assessing hull performance of vessels it does not own using AIS data alonenot StormGlass
  • An owner needing auditable CII and EU ETS numbers rather than spreadsheet estimatesnot StormGlass
  • A technical manager deciding whether hull cleaning this quarter pays for itself in fuelnot StormGlass
  • A fleet arguing a charter party speed and consumption claim and needing model-backed evidencenot StormGlass

StormGlass

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

Where each one falls short

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

NAPA Fleet Intelligence

  • Model-derived performance from AIS and noon reports is an estimate, so it supports fleet screening and dispute evidence better than fine-grained optimisation of a single ship.
  • Pricing is per vessel and unpublished, and modular scoping means the quote you compare against a competitor may not cover the same functions.
  • Building the vessel-specific performance model requires hull form and design data that owners of older or second-hand tonnage often do not have, which turns onboarding into a data hunt.
  • It is a monitoring and advisory layer, not a system of record; you still run a separate planned maintenance system, a chartering system and a crewing system.
  • NAPA is strongest in the design and stability world, and its operational reference base, while real, is smaller than the pure voyage-optimisation specialists, so integration breadth with commercial shipping software is narrower.

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 Fleet Intelligence

On request
  • NAPA Fleet Intelligence$undefined/year
    • Licensed per vessel with modular scope
    • Fleet agreements and multi-year terms negotiated
    • Vessel model creation may be a one-off setup charge

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 Fleet Intelligence if

  • You need napa performance model.
  • You work on Web, Cloud.
  • You also want ais-based analysis.
NAPA Fleet Intelligence 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 Fleet Intelligence or StormGlass better?
Neither clearly leads. NAPA Fleet Intelligence starts at On request and StormGlass at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, NAPA Fleet Intelligence or StormGlass?
StormGlass has a free tier; the other does not. Paid plans start at On request for NAPA Fleet Intelligence and Free for StormGlass.
Does NAPA Fleet Intelligence or StormGlass run on more platforms?
NAPA Fleet Intelligence runs on Web, Cloud. StormGlass runs on Api.
Can I use StormGlass for free?
Yes. StormGlass has a free tier, so you can try it without paying. NAPA Fleet Intelligence starts at On request.
What is NAPA Fleet Intelligence best used for?
NAPA Fleet Intelligence is most often used for a charterer assessing hull performance of vessels it does not own using ais data alone, an owner needing auditable cii and eu ets numbers rather than spreadsheet estimates, a technical manager deciding whether hull cleaning this quarter pays for itself in fuel, a fleet arguing a charter party speed and consumption claim and needing model-backed evidence. Of those, a charterer assessing hull performance of vessels it does not own using ais data alone and an owner needing auditable cii and eu ets numbers rather than spreadsheet estimates are not what StormGlass is typically brought in for.
What can NAPA Fleet Intelligence do that StormGlass cannot?
NAPA Fleet Intelligence covers NAPA Performance Model, AIS-based analysis, Voyage optimisation, Emissions reporting. StormGlass covers Marine weather data, Wave forecasts, Tide data, Historical weather.

Answered from the vendors’ own pages

NAPA Fleet Intelligence: Do we need onboard sensors?

No. NAPA can produce performance analysis from AIS and noon reports using its hydrodynamic model, though instrumented data improves accuracy.

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
NAPA Fleet Intelligence: Does it handle EU ETS and CII?

Yes, emissions calculation and regulatory reporting for EU MRV, IMO DCS, CII and EU ETS are covered.

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
NAPA Fleet Intelligence: Is it the same NAPA used for ship design?

Yes, same company, and Fleet Intelligence reuses the hydrodynamic modelling from that business.

StormGlass: Is annual billing available?

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

Source
NAPA Fleet Intelligence: Is pricing published?

No. It is licensed per vessel by module, quoted per fleet.

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