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Maritime · head to head

StormGlass vs Wartsila Voyage

StormGlass logo

StormGlass

Maritime

Global weather data API for maritime

From
Free
Rated
-
Full reviewWebsite
Wartsila Voyage logo

Wartsila Voyage

Maritime

Smart maritime ecosystem solutions

From
$15000/one-time
Rated
-
Full reviewWebsite

The short version

  • Only StormGlass has a free tier, so it costs nothing to try first.
  • Each has a real cost: StormGlass the free tier allows 10 API requests per day and is not licensed for commercial use; Wartsila Voyage limited publicly available pricing information requires direct contact with sales team
  • They diverge on capability: StormGlass covers Marine weather data, Wartsila Voyage covers ECDIS navigation.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which StormGlass and Wartsila Voyage actually diverge.

Attributes where StormGlass and Wartsila Voyage differ
AttributeStormGlassWartsila Voyage
Starting priceFree$15000/one-time
Pricing modelfreemiumone-time
Free tierYesNo
PlatformsApiBridge Systems, Web
Founded20171834

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 StormGlass

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

Only in Wartsila Voyage

  • ECDIS navigation
  • Voyage planning
  • Fleet performance
  • Port optimization
  • Bridge systems
  • Fleet management
  • Port systems
  • Embedded support

What people use each for

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

StormGlass

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

Wartsila Voyage

  • Optimizing fuel consumption through voyage route planningnot StormGlass
  • Retrofitting existing ships for emissions compliancenot StormGlass
  • Training crews on methanol and ammonia enginesnot StormGlass
  • Tracking carbon footprint across shipping fleetnot StormGlass

Where each one falls short

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

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

Wartsila Voyage

  • Limited publicly available pricing information requires direct contact with sales team
  • Requires specialized training for bridge crews to operate effectively in different vessel scenarios

Pricing, plan by plan

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

Wartsila Voyage

$15000/one-time
  • ECDIS Suite$30000/one-time
    • ECDIS
    • Voyage planning
    • Weather routing

Which should you pick?

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

Choose Wartsila Voyage if

  • You need ecdis navigation.
  • You work on Bridge Systems, Web.
  • You also want voyage planning.
Wartsila Voyage review

Questions people ask

Is StormGlass or Wartsila Voyage better?
Neither clearly leads. StormGlass starts at Free and Wartsila Voyage at $15000/one-time, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, StormGlass or Wartsila Voyage?
StormGlass has a free tier; the other does not. Paid plans start at Free for StormGlass and $15000/one-time for Wartsila Voyage.
Does StormGlass or Wartsila Voyage run on more platforms?
StormGlass runs on Api. Wartsila Voyage runs on Bridge Systems, Web.
Can I use StormGlass for free?
Yes. StormGlass has a free tier, so you can try it without paying. Wartsila Voyage starts at $15000/one-time.
What is StormGlass best used for?
StormGlass is most often used for pulling marine weather and sea state forecasts into a vessel routing or planning tool, adding tide, wave and wind data to a maritime or coastal application. Of those, pulling marine weather and sea state forecasts into a vessel routing or planning tool and adding tide, wave and wind data to a maritime or coastal application are not what Wartsila Voyage is typically brought in for.
What can StormGlass do that Wartsila Voyage cannot?
StormGlass covers Marine weather data, Wave forecasts, Tide data, Historical weather. Wartsila Voyage covers ECDIS navigation, Voyage planning, Fleet performance, Port optimization.

Answered from the vendors’ own pages

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
Wartsila Voyage: What is Navi-Sailor ECDIS?

Navi-Sailor ECDIS is an IMO-compliant electronic chart display system integrating GPS, radar, and AIS data for route planning and monitoring. It is one of the most installed ECDIS solutions worldwide.

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
Wartsila Voyage: Does Wärtsilä offer fleet management integration?

Yes. Navi-Sailor ECDIS integrates with Wärtsilä Fleet Optimisation Solution to connect ship and shore, providing fleet teams better visibility and bridge teams streamlined workflows.

Source
StormGlass: Is annual billing available?

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

Source
Wartsila Voyage: Is Wärtsilä Voyage compliant with maritime regulations?

Yes. Navi-Sailor ECDIS is fully IMO-compliant and designed to satisfy SOLAS Chapter V requirements. It supports S-100 standards for future maritime data interoperability.

Source
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