Company lists · Data refreshed September 2026

Top 25 Seafaring workforce management software companies based in London, United Kingdom

Name: Seafaring workforce management software companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 75 companies tracked

RevenueBase identified 75 seafaring workforce management software companies headquartered in London, United Kingdom as of September 2026 and tracks 2,276 professional contacts across them, including 563 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers seafaring workforce management software companies headquartered in London, 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 29, 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 29, 2026 86% judged on-target in blind review

75Companies

2,276Contacts tracked

563Verified emails

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The 25 largest seafaring workforce management software companies based in London, United Kingdom

Ranked by team size

Top 25 of 75 seafaring workforce management software companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to seafaring workforce management 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	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	n/a	681 contacts →
	Partial evidence “SDSD - Supporting Maritime Professionals since 1983 Software innovation to the Maritime industry for more than 30 years.” Source: RevenueBase Database · checked Sep 29, 2026
2	Oneocean	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	295 contacts →
	Indirect evidence “Welcome to OneOcean: the ocean’s digital ecosystem and trusted partner for maritime businesses worldwide.” Source: RevenueBase Database · checked Sep 29, 2026
3	Ocean Technologies Group	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	233 contacts →
	Indirect evidence “Powering teams that deliver for people and planet.” Source: RevenueBase Database · checked Sep 29, 2026
4	Ninety Percent Of Everything 90poe	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	161 contacts →
	Indirect evidence “Creating clarity, control and confidence for modern maritime operations with OpenOcean STUDIO.” Source: RevenueBase Database · checked Sep 29, 2026
5	SEA	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	146 contacts →
	Partial 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 29, 2026
6	Spot Ship	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	141 contacts →
	Indirect evidence “We are a shipbroking technology company.” Source: RevenueBase Database · checked Sep 29, 2026
7	Ulysses Systems	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	78 contacts →
	Partial evidence “Ulysses Systems is a leading marine industry provider of enterprise software.” Source: RevenueBase Database · checked Sep 29, 2026
8	Alis Global UK LTD	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	49 contacts →
	Partial evidence “ALIS GLOBAL UK is a leading global workforce solutions provider with over nine years of experience under MCA MLC 2006, ISO 9001, 45001, 14001 certifications and IMCA membership.” Source: RevenueBase Database · checked Sep 29, 2026
9	Precise Consultants	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	40 contacts →
	Indirect evidence “Working offshore is unlike any other job; it takes a certain kind of person to excel in this complex and highly specialised world.” Source: RevenueBase Database · checked Sep 29, 2026
10	Quarterdeck	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	501-1,000	36 contacts →
	Indirect evidence “Launched from the simple understanding that friendly, high quality service aboard a yacht is key to any successful trip at sea, Quarterdeck has become a market leader in the…” Source: RevenueBase Database · checked Sep 29, 2026
11	MARLO	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	36 contacts →
	Indirect 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 29, 2026
12	Waypoint Global	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	32 contacts →
	Indirect evidence “Waypoint Global operates across Europe, the Americas, the Middle East and Asia providing consultancy services and staffing project solutions to niche vertical markets and in…” Source: RevenueBase Database · checked Sep 29, 2026
13	Marino Tech Services	Strong evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
14	Rldatix Government & Commercial Solutions	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	1,001-5,000	13 contacts →
	Strong evidence “RLDatix Government and Commercial Solutions team are supporting organisations globally in driving efficiency through optimising workforce management, transport, and HR solutions.” Source: RevenueBase Database · checked Sep 29, 2026
15	PAC Ocean Solutions Limited	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	13 contacts →
	Indirect evidence “Leading Marine Services Provider, Specializing In Ship Repairs, Maintenance, and Innovative Maritime Solutions.” Source: RevenueBase Database · checked Sep 29, 2026
16	Mycrewagency	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	11 contacts →
	Indirect evidence “mycrewagency are the leading recruitment agency in the Superyacht sector.” Source: RevenueBase Database · checked Sep 29, 2026
17	Educy Maritime & Shipping	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	11 contacts →
	Partial evidence “Educy Maritime & Shipping is a UK-based ship management and maritime services company working with owners and operators of dry cargo vessels trading internationally.” Source: RevenueBase Database · checked Sep 29, 2026
18	Proteus Professionals	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	10 contacts →
	Indirect evidence “Proteus Professionals is comprised of incredibly talented and qualified individuals who are passionate about the marine industry, and who’ve devoted their lives to sailing and…” Source: RevenueBase Database · checked Sep 29, 2026
19	Pinpoint Works	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	8 contacts →
	Indirect evidence “Pinpoint Works is an dynamic communication platform which turns your vessel's general arrangement (GA) into an interactive work list.” Source: RevenueBase Database · checked Sep 29, 2026
20	Norbulk Shipping U.K. Limited	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	8 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
21	Ensemble	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	7 contacts →
	Indirect evidence “Ensemble Analytics uses machine learning and data analytics to optimise maritime operations.” Source: RevenueBase Database · checked Sep 29, 2026
22	Shipzone	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	7 contacts →
	Indirect 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 29, 2026
23	Seadock Marine Agencies LTD	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	6 contacts →
	Indirect evidence “SeaDock Marine Agencies, established in 2015, is an international maritime solutions provider with offices in London and Piraeus and a global network of trusted partners and…” Source: RevenueBase Database · checked Sep 29, 2026
24	Diyachting	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	5 contacts →
	Indirect evidence “diYachting was founded by Matt & Liz Abbiss in 2001.” Source: RevenueBase Database · checked Sep 29, 2026
25	Op-Co	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	5 contacts →
	Indirect evidence “What is OP-CO Marine?” Source: RevenueBase Database · checked Sep 29, 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: seafaring workforce management 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 seafaring workforce management software companies.
Partial evidence: Its own public description names part of seafaring workforce management software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name seafaring workforce management 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 75 seafaring workforce management software companies based in London, United Kingdom

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Seafaring workforce management software companies based in London, United Kingdom at a glance

As of Sep 29, 2026

24.7%Verified-email coverage

30.3Average contacts per company

1-10Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 75 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 seafaring workforce management 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 London, United Kingdom whose own description of what they do matches “seafaring workforce management 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 seafaring workforce management 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 seafaring workforce management software companies, and records with no verified work email. Companies headquartered outside London 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, 563 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 29, 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 seafaring workforce management 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 seafaring workforce management software companies are there based in London, United Kingdom?

RevenueBase identified 75 seafaring workforce management software companies headquartered in London, 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 in the United Kingdom has the most seafaring workforce management software companies?

London leads the United Kingdom with 75 headquartered companies, followed by Glasgow (11) and Southampton (10).

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 563 verified decision-maker contacts tracked across these 75 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 29, 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.