Company lists · Data refreshed September 2026

Top 25 Maritime software developers based in the United Kingdom

Name: Maritime software developers 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 159 companies tracked

RevenueBase identified 159 maritime software developers headquartered in the United Kingdom as of September 2026 and tracks 5,179 professional contacts across them, including 1,037 with verified work emails. London is the largest hub.

This list covers maritime software developers 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

159Companies

5,179Contacts tracked

1,037Verified emails

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The 25 largest maritime software developers based in the United Kingdom

Ranked by team size

Top 25 of 159 maritime software developers 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 software developers: 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	Sperry Marine	Partial evidence	New Malden, United KingdomHQ checked Sep 28, 2026	201-500	279 contacts →
	Partial evidence “Sperry Marine provides the commercial and defence maritime industry with Navigation Solutions that excel in efficiency, reliability and safety.” Source: RevenueBase Database · checked Sep 28, 2026
4	James Fisher Fendercare	Partial evidence	Norwich, United KingdomHQ checked Sep 28, 2026	1,001-5,000	204 contacts →
	Partial evidence “Shaping the future of maritime.” Source: RevenueBase Database · checked Sep 28, 2026
5	Pole Star Global	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	183 contacts →
	Partial evidence “Pole Star Global is a maritime intelligence and technology solutions company, focusing on reducing risk and optimising trade efficiency.” Source: RevenueBase Database · checked Sep 28, 2026
6	Ninety Percent Of Everything 90poe	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	161 contacts →
	Partial evidence “Creating clarity, control and confidence for modern maritime operations with OpenOcean STUDIO.” Source: RevenueBase Database · checked Sep 28, 2026
7	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
8	Orca AI	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	132 contacts →
	Partial evidence “Founded in 2018 by a team of Navy veterans, Orca AI, a maritime tech startup, empowers shipping companies to enhance their operational safety, efficiency, and sustainability…” Source: RevenueBase Database · checked Sep 28, 2026
9	SRT Marine Systems PLC	Partial evidence	Midsomer Norton, United KingdomHQ checked Sep 28, 2026	51-200	129 contacts →
	Partial evidence “SRT Marine Systems PLC is a global leader and innovator in maritime surveillance, intelligence, navigation safety and situational awareness.” Source: RevenueBase Database · checked Sep 28, 2026
10	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
11	Seebyte	Strong evidence	Edinburgh, United KingdomHQ checked Sep 28, 2026	51-200	81 contacts →
	Strong evidence “SeeByte provides clients in the global maritime industry with the most advanced software solutions to enhance the capabilities of their uncrewed systems.” Source: RevenueBase Database · checked Sep 28, 2026
12	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
13	Maritime Craft Services Clyde Limited	Partial evidence	Largs, United KingdomHQ checked Sep 28, 2026	51-200	59 contacts →
	Partial evidence “Maritime Craft Services (clyde) Limited is a Maritime company located in Irvine Rd, Largs, United Kingdom.” Source: RevenueBase Database · checked Sep 28, 2026
14	Orwell Offshore	Indirect evidence	Ipswich, United KingdomHQ checked Sep 28, 2026	51-200	38 contacts →
	Indirect evidence “Orwell Offshore, established in 2006, is a UK headquartered Naval Architecture and Offshore Engineering company with offices in Ipswich, London, Singapore, Nigeria, and Indonesia.” Source: RevenueBase Database · checked Sep 28, 2026
15	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
16	Gtmaritime	Partial evidence	Warrington, United KingdomHQ checked Sep 28, 2026	11-50	35 contacts →
	Partial evidence “Since 1998, we have been providing a range of technology solutions and services for Maritime IT teams helping them manage communications, security, and fleet operations from shore…” Source: RevenueBase Database · checked Sep 28, 2026
17	Triton Software LTD	Partial evidence	Aberdeenshire, United KingdomHQ checked Sep 28, 2026	51-200	28 contacts →
	Partial evidence “For over 25 years, Triton Software (Formerly Pisys Marine) is one of a leading company in marine domain providing the software, services and data solutions to its customers in the…” Source: RevenueBase Database · checked Sep 28, 2026
18	AST Reygar	Indirect evidence	Stoke Gifford, United KingdomHQ checked Sep 28, 2026	1-10	27 contacts →
	Indirect evidence “AST Reygar provides robust and reliable performance monitoring and control solutions for both crewed and uncrewed vessels, of all sizes and functions, in the complex marine…” Source: RevenueBase Database · checked Sep 28, 2026
19	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
20	Sirm UK Marine LTD	Indirect evidence	Chelmsford, United KingdomHQ checked Sep 28, 2026	51-200	22 contacts →
	Indirect evidence “SIRM UK is the only organisation anywhere in the world that has been continuously involved in the supply and support of ships’ radio installations since the very inception of…” Source: RevenueBase Database · checked Sep 28, 2026
21	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
22	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
23	QED Naval LTD	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 28, 2026	1-10	15 contacts →
	Indirect evidence “QED Naval is defined as a high growth company that is using nearly 20 years experience within naval architecture and marine engineering consultancy to develop concepts for the…” Source: RevenueBase Database · checked Sep 28, 2026
24	Marico Marine Group	Partial evidence	Southampton, United KingdomHQ checked Sep 28, 2026	11-50	14 contacts →
	Partial evidence “Marico Marine is an independent maritime consultancy based in the UK and New Zealand with ocean safety, security and environmental protection at the very heart of what we do.” Source: RevenueBase Database · checked Sep 28, 2026
25	Tymor Marine	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “Tymor Marine is a naval architecture and marine engineering consultancy headquartered in Aberdeen, with offices in Glasgow and Lafayette.” 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 software developers. 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 software developers.
Partial evidence: Its own public description names part of maritime software developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name maritime software developers. 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 159 maritime software developers based in the United Kingdom

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Maritime software developers based in the United Kingdom at a glance

As of Sep 28, 2026

20.0%Verified-email coverage

32.6Average contacts per company

1-10Median size (employees)

23.9%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 159 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 software developers, 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 software developers”. 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 software developers), 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 software developers, 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, 1,037 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.

Maritime software developers by metro

Maritime software developers in London38

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 software developers, 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 software developers are there based in the United Kingdom?

RevenueBase identified 159 maritime software developers 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 software developers?

London leads with 38 headquartered companies, followed by Bristol (6) and Southampton (5).

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 1,037 verified decision-maker contacts tracked across these 159 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.