Company lists · Data refreshed November 2026

Top 25 IT audit companies based in the United Kingdom

RevenueBase identified 61 company matches for IT audit companies associated with the United Kingdom as of November 2026 and tracks 555 professional contacts across them, including 224 with verified work emails. London is the largest hub.

This list covers company matches for IT audit companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
61Companies
555Contacts tracked
224Verified emails
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The 25 largest IT audit companies based in the United Kingdom

Ranked by team size
Top 25 of 61 company matches for IT audit companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchBella Vista, United KingdomHQ recorded Nov 6, 2026201-50066 contacts →

Exact match

“At RA, our PASSION is navigating digital complexities, securing assets, and ensuring compliance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchCambridge, United KingdomHQ recorded Nov 6, 202611-5032 contacts →

Exact match

“Pentesting Exams by Pentesting Experts.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchEly, United KingdomHQ recorded Nov 6, 202651-20031 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchDurham, United KingdomHQ recorded Nov 6, 202651-20029 contacts →

Exact match

“Providing internal audit, technology risk assurance and counter fraud services in the North of England.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchLeeds, United KingdomHQ recorded Nov 6, 202611-5023 contacts →

Exact match

“Halo I.S is not just another cybersecurity organization based in the UK; we're a testament to evolution and client-centric innovation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchWimbledon, United KingdomHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“We are dedicated to advancing cyber security through meticulous assessment of products and services engineered to detect and thwart cyber attacks.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“Platformed's AI auditor automates IT and financial audits end-to-end.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchCity Of London, United KingdomHQ recorded Nov 6, 2026201-50014 contacts →

Exact match

“Parker Russell is a leading audit firm offering comprehensive services to medium to large corporations, specialising in FCA-regulated environments and stock exchange-listed…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchNottingham, United KingdomHQ recorded Nov 6, 202611-5012 contacts →

Exact match

“When you work with us, you can expect a no-fuss, reliable audit.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchPoole, United KingdomHQ recorded Nov 6, 202611-5011 contacts →

Exact match

“Corporate IT Systems (CITSL) helps the organisations society depends on most make trust provable.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5011 contacts →

Exact match

“1 Cyber Valley is a PCI DSS–approved Qualified Security Assessor (QSA) and PCI PIN Assessor (QPA), delivering compliance and assurance services to clients in more than 120…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchRotherham, United KingdomHQ recorded Nov 6, 20261-107 contacts →

Exact match

“Cyber Alchemy protects the value in your business, ensuring resilience against evolving cyber threats.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchManchester, United KingdomHQ recorded Nov 6, 2026501-1,0007 contacts →

Exact match

“NGS Secure is now NCC Group NCC Group is a leading global information assurance firm, providing freedom from doubt that all critical material is available, protected, and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchHarrow-on-the-hill, United KingdomHQ recorded Nov 6, 20261-107 contacts →

Exact match

“ERS Consultancy is an Information Security services firm offering a diverse portfolio of services including security training & certification, penetration testing, computer…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchTewkesbury, United KingdomHQ recorded Nov 6, 20261-105 contacts →

Exact match

“Information security and compliance can be a challenging process across many areas and for many organisations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-105 contacts →

Exact match

“As a distinguished UK National Cyber Security Center (NCSC) Assured Services Provider and an authorised certification body for esteemed credentials such as Cyber Essentials, Cyber…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-104 contacts →

Exact match

“Cyber Sense is a UK-based cyber assurance company helping businesses stay secure, compliant, and audit-ready.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchChatham, United KingdomHQ recorded Nov 6, 202611-504 contacts →

Exact match

“Intex IT is an Information Security Consultancy We provide Consultancy in the following areas: ISO 27001 –Information Security Management System (ISMS) ISO 27005 – Risk Management…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchMarket Deeping, United KingdomHQ recorded Nov 6, 20261-103 contacts →

Exact match

“As a certified accreditation body for Cyber Essentials and IASME Cyber Assurance, Unity Metrix is at the frontline of the fight against cyber threats, delivering robust security…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchAlderholt, United KingdomHQ recorded Nov 6, 20261-103 contacts →

Exact match

“Established in 2021, Elsiarc was created to develop a more personal approach to internal audit, regulatory compliance and risk management.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-103 contacts →

Exact match

“We are an Internal Audit search firm operating within the Financial Services sector.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchCambridgeshire, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“StarSwift is an Information Security Consultancy based in Cambridgeshire offering Information Security Consultancy, Certification & Audit and Managed Security Services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchDundonald, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“CyberAggress (Aggress Ltd) is dedicated to ensuring all businesses are cyber resilient, we are able to certify companies having reached the requirements for the Cyber Essentials…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchBournemouth, United KingdomHQ recorded Nov 6, 20261-101 contacts →

Exact match

“We are cyber security services company based in Bournemouth, offering a wide range of services from security audits, assistance with compliance and certification to penetration…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchBradford, United KingdomHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Businesses rely on their computers for all their activities from marketing/sales, to delivery and finance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 61 IT audit companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 224 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT audit companies based in the United Kingdom at a glance

As of Nov 6, 2026
40.4%Verified-email coverage
9.1Average contacts per company
1-10Median size (employees)
36.1%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
33
11-50
19
51-200
4
201-500
2
501-1,000
1
5,001-10,000
1

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 61 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “IT audit companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 224 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “IT audit companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT audit companies are there based in the United Kingdom?

RevenueBase identified 61 company matches for IT audit companies associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Risk Associates tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most IT audit companies?

London leads with 22 company records, followed by Leeds (2) and Manchester (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 224 professional contacts with verified work emails tracked across these 61 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.