Company lists · Data refreshed September 2026

Top 25 Marine software developers based in the United Kingdom

Name: Marine 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 496 companies tracked

RevenueBase identified 496 marine software developers headquartered in the United Kingdom as of September 2026 and tracks 11,870 professional contacts across them, including 3,421 with verified work emails. London is the largest hub.

This list covers marine 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

496Companies

11,870Contacts tracked

3,421Verified emails

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The 25 largest marine software developers based in the United Kingdom

Ranked by team size

Top 25 of 496 marine 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 marine 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	Ocean Infinity	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	714 contacts →
	Indirect evidence “Ocean Infinity is a technology-driven company transforming how ocean operations are carried out.” Source: RevenueBase Database · checked Sep 28, 2026
2	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
3	UTEC	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 28, 2026	201-500	490 contacts →
	Indirect evidence “UTEC, Acteon’s Geo-services business line, harnesses data to optimise designs, save time and maximise your project’s economic value by providing a holistic understanding of the…” Source: RevenueBase Database · checked Sep 28, 2026
4	Raymarine	Partial evidence	Fareham, United KingdomHQ checked Sep 28, 2026	201-500	448 contacts →
	Partial evidence “Teledyne Raymarine, a world leader in marine electronics, develops and manufactures the most comprehensive range of electronic equipment for the recreational boating and light…” Source: RevenueBase Database · checked Sep 28, 2026
5	Ambrey	Partial evidence	Hereford, United KingdomHQ checked Sep 28, 2026	51-200	435 contacts →
	Partial evidence “Always On"- We are at the heart of a diverse and interdependent global maritime eco-system.” Source: RevenueBase Database · checked Sep 28, 2026
6	James Fisher And Sons PLC	Indirect evidence	Barrow-in-furness, United KingdomHQ checked Sep 28, 2026	1,001-5,000	403 contacts →
	Indirect evidence “Above, below and beyond the world’s oceans.” Source: RevenueBase Database · checked Sep 28, 2026
7	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
8	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
9	Apcl A&p Group Limited	Partial evidence	Hebburn, United KingdomHQ checked Sep 28, 2026	501-1,000	240 contacts →
	Partial evidence “A&P, part of the APCL Group, is a global marine engineering business which operates six dry docks across two strategic locations in the UK and delivers engineering excellence to…” Source: RevenueBase Database · checked Sep 28, 2026
10	Mactaggart Scott	Partial evidence	Loanhead, United KingdomHQ checked Sep 28, 2026	201-500	210 contacts →
	Partial evidence “A Scottish engineering company founded in 1898, MacTaggart Scott supports the Naval Defence and Marine market.” Source: RevenueBase Database · checked Sep 28, 2026
11	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
12	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
13	Subsea Craft Limited	Partial evidence	Portsmouth, United KingdomHQ checked Sep 28, 2026	51-200	159 contacts →
	Partial evidence “Based in Portsmouth, SSC’s mission is to provide maritime and amphibious forces with the operational advantage through the accelerated research, development and delivery of…” Source: RevenueBase Database · checked Sep 28, 2026
14	MDL Marinas LTD	Partial evidence	Southampton, United KingdomHQ checked Sep 28, 2026	201-500	157 contacts →
	Partial evidence “The MDL team includes experienced and professionally qualified specialists in all facets of marina development and marina operations.” Source: RevenueBase Database · checked Sep 28, 2026
15	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
16	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
17	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
18	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
19	Cathelco	Indirect evidence	Chesterfield, United KingdomHQ checked Sep 28, 2026	51-200	91 contacts →
	Indirect evidence “Cathelco safeguards your fleet by managing biofouling, ensuring corrosion protection, and generating freshwater Our offering: Ultrasonic Antifouling - Cathelco's DragGone™…” Source: RevenueBase Database · checked Sep 28, 2026
20	Houlder Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	91 contacts →
	Indirect evidence “Sea.” Source: RevenueBase Database · checked Sep 28, 2026
21	SMS Group Ship Repair Marine Interiors Marine Engineering SC Sqep	Partial evidence	Southampton, United KingdomHQ checked Sep 28, 2026	51-200	89 contacts →
	Partial evidence “Southampton Marine Services Ltd was established in 2004 and specialises in ship / work boat building, vessel repair and marine engineering; we trade in four markets - Commercial…” Source: RevenueBase Database · checked Sep 28, 2026
22	Shearwater Marine Services	Partial evidence	Sandbank, United KingdomHQ checked Sep 28, 2026	51-200	87 contacts →
	Partial evidence “Founded in 1992, Shearwater Marine Services have since grown to become a highly respected topside and sub-surface marine engineering service provider.” Source: RevenueBase Database · checked Sep 28, 2026
23	Caudwell Marine	Partial evidence	Coventry, United KingdomHQ checked Sep 28, 2026	51-200	84 contacts →
	Partial evidence “Caudwell Marine was founded to bring a new standard of diesel outboard technology to the marine industry.” Source: RevenueBase Database · checked Sep 28, 2026
24	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
25	Ulysses Systems	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	78 contacts →
	Strong evidence “Ulysses Systems is a leading marine industry provider of enterprise software.” 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: marine 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 marine software developers.
Partial evidence: Its own public description names part of marine software developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine 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 496 marine software developers based in the United Kingdom

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Marine software developers based in the United Kingdom at a glance

As of Sep 28, 2026

28.8%Verified-email coverage

23.9Average contacts per company

1-10Median size (employees)

11.5%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

294

11-50

124

51-200

201-500

501-1,000

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 496 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 marine 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 “marine 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 marine 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 marine 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, 3,421 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.

Marine software developers by metro

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

RevenueBase identified 496 marine 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?

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

Which city has the most marine software developers?

London leads with 57 headquartered companies, followed by Southampton (30) and Aberdeen (12).

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 3,421 verified decision-maker contacts tracked across these 496 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.