Company lists · Data refreshed September 2026
Top 25 Custom compliance companies based in the United Kingdom
RevenueBase identified 508 custom compliance companies headquartered in the United Kingdom as of September 2026 and tracks 3,972 professional contacts across them, including 1,481 with verified work emails. London is the largest hub.
This list covers custom compliance 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 21, 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.
The 25 largest custom compliance companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 453 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 291 contacts → | ||||
Partial evidence “The Citation Group offer unrivalled compliance and quality services to over businesses across the UK, Australia, New Zealand, and Canada.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 242 contacts → | ||||
Partial evidence “We help our customers to do the right business in the right way.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 141 contacts → | ||||
Partial evidence “Intelligent compliance solutions for outcomes that matter* We offer complete compliance solutions to help financial services firms solve their regulatory challenges.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 104 contacts → | ||||
Indirect evidence “Creating Safer Workplaces for Everyone.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 99 contacts → | ||||
Indirect evidence “Sovos provides businesses with the confidence needed to navigate an increasingly regulated world.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 97 contacts → | ||||
Indirect evidence “In the wake of Brexit, the international trade landscape was forever altered.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 92 contacts → | ||||
Indirect evidence “AES Sustainability Consultants is a leading technical consultancy that delivers value engineered solutions across the homebuilding and construction industries.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 77 contacts → | ||||
Partial evidence “Founded in 1986, Assurity Consulting is an independent workplace compliance consultancy specialising in health, safety and environmental solutions, partnering with responsible…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 65 contacts → | ||||
Indirect evidence “At QCS, our mission is to support health and social care providers in delivering exceptional care.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 57 contacts → | ||||
Strong evidence “iCustoms is an AI-driven Trade Compliance Management Platform that offers fully automated customs management solutions for importers, exporters, customs agents, brokers, freight…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 50 contacts → | ||||
Indirect evidence “International Associates (IA) is a leading provider of assessment, audit, verification, certification and training services.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 38 contacts → | ||||
Partial evidence “Martintrux offer professional Customs Clearance Management for Imports and Exports through all UK Ports and Airports; monitored 24 hours every day from our main office in Dover…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 35 contacts → | ||||
Indirect evidence “CS Lifesciences is an award-winning enterprise regulatory strategy consultancy, rated #1 in the US, and trusted by Fortune 500 companies, leading medtech firms, and diagnostics…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 34 contacts → | ||||
Indirect evidence “Ruleguard is the leading AI-powered Continuous Assurance Platform built exclusively for regulated financial services firms.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 30 contacts → | ||||
Partial evidence “Derry Bros Customs Clearance, established in 2020, has rapidly emerged as a leading medium-sized business, providing a comprehensive range of customs clearance services to…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 28 contacts → | ||||
Indirect evidence “Verita is the leading independent consultancy for regulated organisations in the UK.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 26 contacts → | ||||
Partial evidence “Our goal is to make regulation and compliance testing simple.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 24 contacts → | ||||
Partial evidence “Purpose led regulatory consultants specialising in financial crime prevention, conduct, compliance and ESG.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 24 contacts → | ||||
Partial evidence “Welcome to Total Compliance - Your Trusted Partner for Legal Compliance and Education in Transport!” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 23 contacts → | ||||
Partial evidence “Regulatory Finance Solutions (RFS) is a leading edge compliance consultancy within the financial risk and regulatory sectors.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 22 contacts → | ||||
Partial evidence “Neuven Consult is the new name for the Neuven Audit division within Neuven Solutions, providing Compliance Expertise and Audits, Bid Management & Tender Support and Framework and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 22 contacts → | ||||
Partial evidence “Eurofins York has over 25 years’ experience delivering global regulatory compliance, CE marking solutions and certification.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 20 contacts → | ||||
Indirect evidence “We at CF assist enterprises manage IT risks better.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 19 contacts → | ||||
Strong evidence “Customs and logistics services designed by compliance professionals, helping you navigate Brexit post-transition and beyond” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
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: custom compliance 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 custom compliance companies.
- Partial evidence
- Its own public description names part of custom compliance companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name custom compliance 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 508 custom compliance companies based in the United Kingdom
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Custom compliance companies based in the United Kingdom at a glance
As of Sep 21, 2026Companies by employee count
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 508 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 custom compliance 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 “custom compliance 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 custom compliance 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 custom compliance 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, 1,481 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 21, 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.
Custom compliance companies by metro
- Custom compliance companies in London107
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 custom compliance 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 custom compliance companies are there based in the United Kingdom?
RevenueBase identified 508 custom compliance 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?
Alcumus, headquartered in Cardiff South, tops this list with the largest team on record.
Which city has the most custom compliance companies?
London leads with 107 headquartered companies, followed by Manchester (13) and Leeds (8).
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 1,481 verified decision-maker contacts tracked across these 508 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 21, 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.
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