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HullCipher icon

HullCipher

Maps sanctioned vessels against live terrestrial AIS, exposing conflicting names, MMSIs, and flags, duplicate IMO claims, silence, restricted-port visits, ship meetings, satellite imagery, replayable tracks, ownership links, alerts, saved fleets, and read-only API access for investigators.

Every ship on the sanctions lists on one live map. The bar on top counts how many are transmitting and how many have gone quiet.

Cost / License

  • Freemium (Subscription)
  • Proprietary

Platforms

  • Online
World replay: every listed ship at a chosen moment, with its recent track. Here, the Strait of Gibraltar, with one tanker's card open: its AIS name beside the names the UK, Australia, Canada and New Zealand list it under.
A ship's card: the name it broadcasts beside the name each sanctions list gives it, with its IMO, MMSI, flag and last position.
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A listed tanker's track from Portugal through the Strait of Gibraltar. Amber stretches mark where she wasn't heard.
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HullCipher information

  • Developed by

    US flagHullCipher LLC

  • Licensing

    Proprietary and Freemium product.

  • Pricing

    Subscription ranging between $50 and $250 per month + free version with limited functionality.

  • Alternatives

    5 alternatives listed

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  • Supported Languages

    • English
HullCipher was added to AlternativeTo by plumleyj on and this page was last updated .

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What is HullCipher?

HullCipher is a real-time mapping tool tracking movements and data of vessels on international sanctions lists. It compares the ship's details on these lists with the information currently broadcasted by the ship. The software accounts for contradictions between these lists and the ship's broadcasts.

HullCipher records every name, MMSI, and flag change from the ship's broadcast and flags numbers not on any list or a second transponder claiming the same IMO. It also notes when a listed ship stops broadcasting, the silence duration, and the status of nearby ships. It provides an hourly coverage map showing where the network can receive ship signals.

The software highlights visits to restricted ports and sea meetings between two ships, providing Sentinel satellite images when available. Users can replay tracks for a single ship or the entire fleet at a chosen moment. The software also allows users to track the ownership network published by authorities.

Users can set up alerts to monitor a ship and receive notifications for various events. A feature to save fleets by pasting a list of IMOs is also available.

For developers, HullCipher provides a read-only API with unique keys and signed webhooks. Any ship can be looked up by name, IMO, or MMSI. Case studies are available for further insights.

HullCipher is free to browse without an account. Free accounts offer extended history and email alerts, while paid plans provide full history and CSV export. The positions are sourced from terrestrial AIS, with history available from August 2026.