Company lists · Data refreshed September 2026

Top 25 Harbor operations software companies based in the United Kingdom

Name: Harbor operations 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 14, 2026 60 companies tracked

RevenueBase identified 60 harbor operations software companies headquartered in the United Kingdom as of September 2026 and tracks 2,388 professional contacts across them, including 481 with verified work emails. London is the largest hub.

This list covers harbor operations 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 14, 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 14, 2026 86% judged on-target in blind review

60Companies

2,388Contacts tracked

481Verified emails

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The 25 largest harbor operations software companies based in the United Kingdom

Ranked by team size

Top 25 of 60 harbor operations software companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to harbor operations 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 14, 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 14, 2026
2	TBA	Strong evidence	Leicester, United KingdomHQ checked Sep 14, 2026	201-500	637 contacts →
	Strong evidence “We are a global software & services business offering integrated solutions to simplify the operations for the entire lifecycle of ports, terminals and warehouses, enabling every…” Source: RevenueBase Database · checked Sep 14, 2026
3	SEA	Partial evidence	London, United KingdomHQ checked Sep 14, 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 14, 2026
4	Orca AI	Partial evidence	London, United KingdomHQ checked Sep 14, 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 14, 2026
5	Spectec	Partial evidence	Manchester, United KingdomHQ checked Sep 14, 2026	51-200	113 contacts →
	Partial evidence “SpecTec is a market-leading maritime technology company specialising in asset management software.” Source: RevenueBase Database · checked Sep 14, 2026
6	Seebyte	Partial evidence	Edinburgh, United KingdomHQ checked Sep 14, 2026	51-200	81 contacts →
	Partial 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 14, 2026
7	Ulysses Systems	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	78 contacts →
	Partial evidence “Ulysses Systems is a leading marine industry provider of enterprise software.” Source: RevenueBase Database · checked Sep 14, 2026
8	Proact International LTD	Partial evidence	Parc, United KingdomHQ checked Sep 14, 2026	51-200	37 contacts →
	Partial evidence “We’re the supply chain software solutions specialists.” Source: RevenueBase Database · checked Sep 14, 2026
9	MARLO	Indirect evidence	London, United KingdomHQ checked Sep 14, 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 14, 2026
10	Clearwater Dynamics	Indirect evidence	Poole, United KingdomHQ checked Sep 14, 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 14, 2026
11	Chersoft LTD	Indirect evidence	Sheffield, United KingdomHQ checked Sep 14, 2026	11-50	22 contacts →
	Indirect evidence “CHERSOFT design high quality marine data management solutions.” Source: RevenueBase Database · checked Sep 14, 2026
12	Marino Tech Services	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	19 contacts →
	Partial 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 14, 2026
13	Onboard Tracker	Partial evidence	Aberdeen, United KingdomHQ checked Sep 14, 2026	11-50	18 contacts →
	Partial evidence “Onboard Tracker™ is the leading Crew Management Software for the Energy, Renewables and Marine sectors.” Source: RevenueBase Database · checked Sep 14, 2026
14	Fargo Systems LTD	Partial evidence	Exeter, United KingdomHQ checked Sep 14, 2026	11-50	16 contacts →
	Partial evidence “Fargo Systems creates and supports state of the art software and services for the transport and logistics industry.” Source: RevenueBase Database · checked Sep 14, 2026
15	Locus Software LTD	Partial evidence	Farnborough, United KingdomHQ checked Sep 14, 2026	11-50	14 contacts →
	Partial evidence “Locus Software Limited is an Information Technology Solution and Service Provider with a specific focus on the Shipping industry.” Source: RevenueBase Database · checked Sep 14, 2026
16	Tymor Marine	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 14, 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 14, 2026
17	toruz.ai	Strong evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	11 contacts →
	Strong evidence “Optimizing Cargo & Ground Handling Operations with Innovative Software Solutions” Source: RevenueBase Database · checked Sep 14, 2026
18	Hubse Demurrage Software	Partial evidence	Northampton, United KingdomHQ checked Sep 14, 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 14, 2026
19	Ensemble	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	7 contacts →
	Partial evidence “Ensemble Analytics uses machine learning and data analytics to optimise maritime operations.” Source: RevenueBase Database · checked Sep 14, 2026
20	Shipzone	Indirect evidence	London, United KingdomHQ checked Sep 14, 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 14, 2026
21	Seall Ecdis	Strong evidence	Aberdeen, United KingdomHQ checked Sep 14, 2026	1-10	5 contacts →
	Strong evidence “Seall ECDIS is a UK headquartered global software solution specialist for marine navigation and fleet operation.” Source: RevenueBase Database · checked Sep 14, 2026
22	Crewsmart	Partial evidence	Colchester, United KingdomHQ checked Sep 14, 2026	1-10	4 contacts →
	Partial evidence “End-to-End Management Tool For Compliant, Effective Maritime Fleet Operations” Source: RevenueBase Database · checked Sep 14, 2026
23	Harbour Assist	Partial evidence	Lostwithiel, United KingdomHQ checked Sep 14, 2026	1-10	4 contacts →
	Partial evidence “Harbour Assist is the leading cloud-based marina management system.” Source: RevenueBase Database · checked Sep 14, 2026
24	Bison Grid Limited	Indirect evidence	Southampton, United KingdomHQ checked Sep 14, 2026	1-10	4 contacts →
	Indirect evidence “Bison Grid is the maritime quality and claims management platform for finished vehicle logistics, the system of record for vehicle condition across multi-handover chains from OEM…” Source: RevenueBase Database · checked Sep 14, 2026
25	Seaborn Software	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	4 contacts →
	Partial evidence “Seaborn Software LTD is a software development company targeting the maritime and, specifically, ship supply industry.” Source: RevenueBase Database · checked Sep 14, 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: harbor operations 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 harbor operations software companies.
Partial evidence: Its own public description names part of harbor operations software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name harbor operations 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 60 harbor operations software companies based in the United Kingdom

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Harbor operations software companies based in the United Kingdom at a glance

As of Sep 14, 2026

20.1%Verified-email coverage

39.8Average contacts per company

11-50Median size (employees)

31.7%Largest-city concentration · London

Sep 14, 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 60 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 harbor operations 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 “harbor operations 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 harbor operations 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 harbor operations 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, 481 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 14, 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 harbor operations 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 harbor operations software companies are there based in the United Kingdom?

RevenueBase identified 60 harbor operations 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 harbor operations software companies?

London leads with 19 headquartered companies, followed by Aberdeen (3) and Norwich (3).

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 481 verified decision-maker contacts tracked across these 60 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 14, 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.