Company lists · Data refreshed September 2026

Top 25 Maritime documentation software companies based in the United Kingdom

Name: Maritime documentation software companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 89 companies tracked

RevenueBase identified 89 maritime documentation software companies headquartered in the United Kingdom as of September 2026 and tracks 1,794 professional contacts across them, including 340 with verified work emails. London is the largest hub.

This list covers maritime documentation software companies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

89Companies

1,794Contacts tracked

340Verified emails

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The 25 largest maritime documentation software companies based in the United Kingdom

Ranked by team size

Top 25 of 89 maritime documentation software companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to maritime documentation software companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	SDSD	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	681 contacts →
	Strong evidence “SDSD - Supporting Maritime Professionals since 1983 Software innovation to the Maritime industry for more than 30 years.” Source: RevenueBase Database · checked Sep 28, 2026
2	Oneocean	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	295 contacts →
	Partial evidence “Welcome to OneOcean: the ocean’s digital ecosystem and trusted partner for maritime businesses worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
3	SEA	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	146 contacts →
	Strong evidence “As the leading independent provider of commercial software for global maritime trade, we’re unleashing the power of data to help drive sustainable shipping.” Source: RevenueBase Database · checked Sep 28, 2026
4	Spectec	Strong evidence	Manchester, United KingdomHQ checked Sep 28, 2026	51-200	113 contacts →
	Strong evidence “SpecTec is a market-leading maritime technology company specialising in asset management software.” Source: RevenueBase Database · checked Sep 28, 2026
5	Ulysses Systems	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	78 contacts →
	Partial evidence “Ulysses Systems is a leading marine industry provider of enterprise software.” Source: RevenueBase Database · checked Sep 28, 2026
6	WMT LTD	Partial evidence	Deeside, United KingdomHQ checked Sep 28, 2026	11-50	73 contacts →
	Partial evidence “Worldwide Marine Technology (WMT) is an independent UK company specialising in producing technical operating and training documentation for the marine, and oil & gas industries.” Source: RevenueBase Database · checked Sep 28, 2026
7	MARLO	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	36 contacts →
	Partial evidence “Marlo is a maritime ERP platform built exclusively for the shipping industry-helping vessel owners, operators, and commercial managers run their entire business from one system.” Source: RevenueBase Database · checked Sep 28, 2026
8	Clearwater Dynamics	Indirect evidence	Poole, United KingdomHQ checked Sep 28, 2026	11-50	24 contacts →
	Indirect evidence “Clearwater Dynamics delivers industry‑leading technology solutions specialising in IoT connectivity, vessel tracking, and risk‑mitigation.” Source: RevenueBase Database · checked Sep 28, 2026
9	Chersoft LTD	Indirect evidence	Sheffield, United KingdomHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “CHERSOFT design high quality marine data management solutions.” Source: RevenueBase Database · checked Sep 28, 2026
10	Marino Tech Services	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	19 contacts →
	Strong evidence “Marino Tech Services have been an active provider in the maritime software space over the past 25 years with the rich legacy of delivering innovative ship management solutions.” Source: RevenueBase Database · checked Sep 28, 2026
11	Poseidon Navigation Services LTD	Indirect evidence	Portgordon, United KingdomHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “As the shipping industry becomes increasingly more complex and regulated, we know that the ship operators need to choose business partners that they can rely upon.” Source: RevenueBase Database · checked Sep 28, 2026
12	Safety At SEA LTD	Indirect evidence	Glasgow, United KingdomHQ checked Sep 28, 2026	1-10	8 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
13	Dean & Waters LTD	Indirect evidence	West Sussex, United KingdomHQ checked Sep 28, 2026	1-10	8 contacts →
	Indirect evidence “The concept and drive behind Dean & Waters Marine Management is to provide a bespoke support service to our Owners, Captains and Crew, without any additional agenda.” Source: RevenueBase Database · checked Sep 28, 2026
14	Hubse Demurrage Software	Partial evidence	Northampton, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Specialising in the delivery of global systems to the oil and shipping industries, Hub Software Engineering was founded in 2009 by I.T.professionals with many decades experience.” Source: RevenueBase Database · checked Sep 28, 2026
15	Shipzone	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “We are a maritime technology company connecting ship spares, stores and provisions to vessels through an innovative platform with proprietary technology.” Source: RevenueBase Database · checked Sep 28, 2026
16	ECDIS	Indirect evidence	Whiteley, United KingdomHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “ECDIS Ltd provide a complete package for seagoing vessels making the transition to digital navigation.” Source: RevenueBase Database · checked Sep 28, 2026
17	DA Gama Maritime	Partial evidence	Chichester, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “Da Gama Maritime was established in 2009 by professional mariners who are passionate about enhancing safety at sea.” Source: RevenueBase Database · checked Sep 28, 2026
18	Seall Ecdis	Partial evidence	Aberdeen, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Seall ECDIS is a UK headquartered global software solution specialist for marine navigation and fleet operation.” Source: RevenueBase Database · checked Sep 28, 2026
19	Crewsmart	Partial evidence	Colchester, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “End-to-End Management Tool For Compliant, Effective Maritime Fleet Operations” Source: RevenueBase Database · checked Sep 28, 2026
20	Seaborn Software	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	4 contacts →
	Strong evidence “Seaborn Software LTD is a software development company targeting the maritime and, specifically, ship supply industry.” Source: RevenueBase Database · checked Sep 28, 2026
21	Zeewarriors	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Zeewarriors is a Marine Specialists company, formed to provide a complete marine service to its customers.” Source: RevenueBase Database · checked Sep 28, 2026
22	Avenca Limited	Indirect evidence	Salisbury, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Avenca are independent world-leading experts in the analysis of Voyage Data Recorder (VDR) data and other marine data (such as ECDIS, AIS, GPS, VTS and CCTV etc.).” Source: RevenueBase Database · checked Sep 28, 2026
23	Sentini Marine	Partial evidence	Huddersfield, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Documentation and Training suites that will raise the operational and safety levels onboard your vessel.” Source: RevenueBase Database · checked Sep 28, 2026
24	Helexco Company LTD	Indirect evidence	Colliers Wood, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Helexco Company Ltd was established in London in 1979 and opened a subsidiary office in Piraeus in Our company’s scope is the provision of equipment and engineering services to…” Source: RevenueBase Database · checked Sep 28, 2026
25	Saltire Marine Services Scotland LTD	Indirect evidence	Paisley, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “A marine service provider, owned and operated by an experienced skipper/marine manager, supporting commercial and private clients with a range of marine services.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: maritime documentation software companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names maritime documentation software companies.
Partial evidence: Its own public description names part of maritime documentation software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name maritime documentation software companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 89 maritime documentation software companies based in the United Kingdom

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Maritime documentation software companies based in the United Kingdom at a glance

As of Sep 28, 2026

19.0%Verified-email coverage

20.2Average contacts per company

1-10Median size (employees)

24.7%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 89 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among maritime documentation software companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “maritime documentation software companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names maritime documentation software companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among maritime documentation software companies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 340 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names maritime documentation software companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many maritime documentation software companies are there based in the United Kingdom?

RevenueBase identified 89 maritime documentation software companies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

SDSD, headquartered in London, tops this list with the largest team on record.

Which city has the most maritime documentation software companies?

London leads with 22 headquartered companies, followed by Chelmsford (2) and Glasgow (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 340 verified decision-maker contacts tracked across these 89 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.