Company lists · Data refreshed September 2026

Top 25 Compliance and IT audit firms based in the United Kingdom

Name: Compliance and IT audit firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 463 companies tracked

RevenueBase identified 463 compliance and IT audit firms headquartered in the United Kingdom as of September 2026 and tracks 2,867 professional contacts across them, including 1,098 with verified work emails. London is the largest hub.

This list covers compliance and IT audit firms 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 19, 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 19, 2026 86% judged on-target in blind review

463Companies

2,867Contacts tracked

1,098Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest compliance and IT audit firms based in the United Kingdom

Ranked by team size

Top 25 of 463 compliance and IT audit firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to compliance and IT audit firms: 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	Kaizen	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	168 contacts →
	Indirect evidence “Kaizen delivers independent regulatory reporting assurance through a scalable platform that combines forensic testing, deep regulatory expertise, and actionable insights.” Source: RevenueBase Database · checked Sep 19, 2026
2	TCC Group	Partial evidence	City Of London, United KingdomHQ checked Sep 19, 2026	51-200	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 19, 2026
3	Trpglobal	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	126 contacts →
	Indirect evidence “We are TRPGLOBAL, your strategic partner in helping you with the complexities of risk management.” Source: RevenueBase Database · checked Sep 19, 2026
4	Saepio Information Security	Indirect evidence	High Wycombe, United KingdomHQ checked Sep 19, 2026	51-200	74 contacts →
	Indirect evidence “Saepio increase awareness, reduce risk and improve security in a continually evolving threat landscape.” Source: RevenueBase Database · checked Sep 19, 2026
5	FSCOM	Partial evidence	Belfast, United KingdomHQ checked Sep 19, 2026	51-200	64 contacts →
	Partial evidence “fscom is one of the premier specialist consulting firms providing governance, risk, and compliance solutions to financial services institutions in the UK and Ireland.” Source: RevenueBase Database · checked Sep 19, 2026
6	Evalian	Indirect evidence	Southampton, United KingdomHQ checked Sep 19, 2026	51-200	60 contacts →
	Indirect evidence “Many organisations are dealing with multiple frameworks, overlapping tools, disconnected ownership, and increasing pressure from regulators, customers, and boards.” Source: RevenueBase Database · checked Sep 19, 2026
7	Firmdecisions	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	55 contacts →
	Indirect evidence “FirmDecisions, member of the Ebiquity Group Plc, is the largest independent global marketing auditor.” Source: RevenueBase Database · checked Sep 19, 2026
8	Paradigm Consulting	Partial evidence	Wilmslow, United KingdomHQ checked Sep 19, 2026	51-200	43 contacts →
	Partial evidence “Paradigm Consulting is a premier provider of compliance support to the UK's financial services community, including directly authorised wealth managers, financial advisers and…” Source: RevenueBase Database · checked Sep 19, 2026
9	Complyport	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	36 contacts →
	Indirect evidence “Welcome to Complyport - member of ComplyMAP Group!” Source: RevenueBase Database · checked Sep 19, 2026
10	GRC International Group	Strong evidence	Ely, United KingdomHQ checked Sep 19, 2026	51-200	35 contacts →
	Strong evidence “GRC International Group plc is the holding company for a group of companies providing a range of products and services to address the IT governance, risk management and compliance…” Source: RevenueBase Database · checked Sep 19, 2026
11	Ruleguard	Indirect evidence	Moorgate, United KingdomHQ checked Sep 19, 2026	11-50	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 19, 2026
12	RQC Group	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	34 contacts →
	Partial evidence “RQC Group is an industry-leading financial compliance consultancy with offices in London and New York, specialising in FCA, SEC and CFTC/NFA Compliance Consulting, Investment…” Source: RevenueBase Database · checked Sep 19, 2026
13	Omnicyber Security	Strong evidence	Solihull, United KingdomHQ checked Sep 19, 2026	11-50	31 contacts →
	Strong evidence “SPECIALISTS IN IT SECURITY AND COMPLIANCE Our goal is to help customers define, develop and implement information security and compliance services, no matter what stage of the…” Source: RevenueBase Database · checked Sep 19, 2026
14	Audit & Risk Recruitment	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	30 contacts →
	Partial evidence “Welcome to Audit & Risk Recruitment - Experts in Audit and Risk Recruitment!” Source: RevenueBase Database · checked Sep 19, 2026
15	Auditone UK	Partial evidence	Durham, United KingdomHQ checked Sep 19, 2026	51-200	26 contacts →
	Partial evidence “Providing internal audit, technology risk assurance and counter fraud services in the North of England.” Source: RevenueBase Database · checked Sep 19, 2026
16	Bowmen Group	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	25 contacts →
	Indirect evidence “Through our consultative approach, specialised skills and innovative delivery model, Bowmen Group successfully implements some of the largest, most complex and notable unified…” Source: RevenueBase Database · checked Sep 19, 2026
17	The Compliance Guys LTD	Partial evidence	Wolverhampton, United KingdomHQ checked Sep 19, 2026	11-50	24 contacts →
	Partial evidence “From FCA Application to Ongoing Compliance – We've Got You Covered!” Source: RevenueBase Database · checked Sep 19, 2026
18	AMR Cybersecurity	Indirect evidence	Cheltenham, United KingdomHQ checked Sep 19, 2026	11-50	23 contacts →
	Indirect evidence “AMR CyberSecurity delivers next generation cyber security services to assist organisations across a wide variety of sectors in understanding potential threats and effectively…” Source: RevenueBase Database · checked Sep 19, 2026
19	Regulatory Finance Solutions	Partial evidence	Swindon, United KingdomHQ checked Sep 19, 2026	11-50	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 19, 2026
20	Neuven Consult	Strong evidence	Manchester, United KingdomHQ checked Sep 19, 2026	11-50	22 contacts →
	Strong 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 19, 2026
21	LMS Security	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Indirect evidence “LMS Security are a fully Independent, privately owned, Internationally recognised and accredited Security Consultancy; owned and built by Electronic and Physical Security…” Source: RevenueBase Database · checked Sep 19, 2026
22	ONE Compliance Cyber Limited	Partial evidence	Leeds, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Partial evidence “One Compliance are data privacy & cyber security specialists that focus on improving our clients security posture so that they can prioritise and mitigate security risks…” Source: RevenueBase Database · checked Sep 19, 2026
23	Consultants Factory	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Partial evidence “We at CF assist enterprises manage IT risks better.” Source: RevenueBase Database · checked Sep 19, 2026
24	Razorthorn Security	Indirect evidence	Tunbridge Wells, United KingdomHQ checked Sep 19, 2026	11-50	19 contacts →
	Indirect evidence “Razorthorn Security is a specialist cybersecurity consultancy founded in 2007, with nearly two decades of experience helping organisations protect their data, their systems and…” Source: RevenueBase Database · checked Sep 19, 2026
25	Compliance And Training Solutions LTD	Partial evidence	Colchester, United KingdomHQ checked Sep 19, 2026	11-50	19 contacts →
	Partial evidence “We are a team of FCA and IFA compliance consultants offering a wide range of completely bespoke services to ensure you remain compliant at all times.” Source: RevenueBase Database · checked Sep 19, 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: compliance and IT audit firms. 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 compliance and IT audit firms.
Partial evidence: Its own public description names part of compliance and IT audit firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name compliance and IT audit firms. 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 463 compliance and IT audit firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,098 reachable decision-makers.

Free signup · no credit card

View the full list →

Compliance and IT audit firms based in the United Kingdom at a glance

As of Sep 19, 2026

38.3%Verified-email coverage

6.2Average contacts per company

1-10Median size (employees)

37.1%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

334

11-50

51-200

201-500

501-1,000

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 463 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 compliance and IT audit firms, 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 “compliance and IT audit firms”. 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 compliance and IT audit firms), 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 compliance and IT audit firms, 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, 1,098 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 19, 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.

Compliance and IT audit firms by metro

Compliance and IT audit firms in London172

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 compliance and IT audit firms, 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 compliance and IT audit firms are there based in the United Kingdom?

RevenueBase identified 463 compliance and IT audit firms 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?

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

Which city has the most compliance and IT audit firms?

London leads with 172 headquartered companies, followed by Manchester (17) and Birmingham (7).

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 1,098 verified decision-maker contacts tracked across these 463 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 19, 2026.

Ready to reach these companies? Verified emails and direct dials for all 463 compliance and IT audit firms based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Compliance and IT audit firms by geography

Browse the directory

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.