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Maritime & Shipping · head to head

StormGlass vs Clarksons

S

StormGlass

Maritime & Shipping

Global weather data API for maritime

From
Free
Rated
-
Full reviewWebsite
Clarksons logo

Clarksons

Maritime & Shipping

World's leading shipbroker and data provider

From
$3000/month
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; Clarksons uK government contract award notice on find-tender.service.gov.uk shows a Clarkson Research Services Limited data subscription contract valued at 6,500 GBP excluding VAT (7,800 GBP including VAT) for the period 1 November 2025 to 31 October 2026
  • They diverge on capability: StormGlass covers Marine weather data, Clarksons covers Market intelligence.

Where they differ

Only the attributes on which StormGlass and Clarksons actually diverge.

Attributes where StormGlass and Clarksons differ
AttributeStormGlassClarksons
Starting priceFree$3000/month
Pricing modelfreemiumsubscription
Free tierYesNo
PlatformsApiWeb, Api
Founded20171852

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

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

Only in Clarksons

  • Market intelligence
  • Fleet database
  • Freight rates
  • Research reports
  • API
  • Excel add-in
  • Data exports
  • Web support

Both cover

  • Api 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 Clarksons
  • Adding tide, wave and wind data to a maritime or coastal applicationnot Clarksons

Clarksons

No use cases recorded yet. See the Clarksons review.

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

Clarksons

  • UK government contract award notice on find-tender.service.gov.uk shows a Clarkson Research Services Limited data subscription contract valued at 6,500 GBP excluding VAT (7,800 GBP including VAT) for the period 1 November 2025 to 31 October 2026

Pricing, plan by plan

StormGlass

Free
  • Professional$149/month
    • 50,000 API calls
    • Historical data
    • Premium support

Clarksons

$3000/month
  • Shipping Intelligence Network$5000/month
    • Market data
    • Fleet database
    • Research reports

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 Clarksons if

  • You need market intelligence.
  • You work on Web, Api.
  • You also want fleet database.
Clarksons review

Questions people ask

Is StormGlass or Clarksons better?
Neither clearly leads. StormGlass starts at Free and Clarksons at $3000/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, StormGlass or Clarksons?
StormGlass has a free tier; the other does not. Paid plans start at Free for StormGlass and $3000/month for Clarksons.
Does StormGlass or Clarksons run on more platforms?
StormGlass runs on Api. Clarksons runs on Web, Api.
Can I use StormGlass for free?
Yes. StormGlass has a free tier, so you can try it without paying. Clarksons starts at $3000/month.
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 Clarksons is typically brought in for.
What can StormGlass do that Clarksons cannot?
StormGlass covers Marine weather data, Wave forecasts, Tide data, Historical weather. Clarksons covers Market intelligence, Fleet database, Freight rates, Research reports. Both handle Api support.
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