IT Audit Services Companies in the UK: A Practical List of Firms to Consider
AC
Acumon Chartered Accountants·22 min read
IT audit is one of those things most organisations know they should take seriously, but few really understand until something goes wrong. It is not just about compliance reports or passing an external review. At its core, it is about checking whether your systems, processes, and controls actually protect the business the way you think they do.
In this article, we are putting together a practical list of IT audit services companies in the UK. The idea is simple: look at who they are, how they work, and what kind of organisations they tend to support. No hype, no grand claims - just a clear overview to help you make a more informed decision.
Acumon
At Acumon, we are a UK based firm of chartered accountants, auditors and advisors, and IT audit forms a practical part of our wider Risk and Tech Assurance work. Alongside statutory audit, accounts and tax, we support finance leaders with internal audit, governance reviews and technology risk assessments. Our team works across risk management, IT risk and cybersecurity, helping organisations understand how their systems and controls operate in real conditions, not just on paper. Because we combine audit with hands-on finance experience, we tend to look at both compliance requirements and how technology supports the wider business.
Although we were founded in London, we work with organisations across the UK, including businesses in Bristol. Much of our audit and assurance support is delivered remotely or in coordination with client teams on site, so geography is rarely a barrier. For companies in Bristol looking at IT audit services, we review internal controls, assess cyber and technology risks, and provide structured internal audit support aligned with UK regulatory expectations. In practice, this means helping local leadership teams gain a clearer picture of governance gaps and risk exposure without turning the process into something overly complicated.
Key Highlights:
UK based team of accountants and auditors
Registered audit firm
Risk and Tech Assurance offering
Experience supporting CFOs and Finance Directors
Services delivered across the UK, including Bristol
Address: 1-2 Craven Road, Ealing, London, W5 2UA, UK
SoloWay Tech
SoloWay provides technology audit services for businesses that rely on complex digital systems. Their audits cover performance, infrastructure, code quality, cybersecurity and compliance. They review hardware, software and cloud environments, looking at how systems are configured and how well they support day to day operations. The aim of their work is to identify gaps, inefficiencies and risks across the technology stack.
Their process usually starts with discovery and scope definition, followed by system assessment and testing. This can include performance testing, security checks and compliance reviews against standards such as ISO 27001 and GDPR. They also offer code reviews, infrastructure audits and cloud assessments across AWS, Azure and GCP environments. In addition to one off audits, they support clients with risk advisory and follow up recommendations where needed.
Key Highlights:
Focus on technology audit and IT infrastructure review
Coverage of performance, security and compliance
Code review and vulnerability assessment capability
Cloud environment audits
Structured audit process from discovery to reporting
Address: 7 Bell Yard Street, London, WC2A 2JR, England
Facebook: www.facebook.com/soloway.tech
Twitter: x.com/SolowayTech
LinkedIn: www.linkedin.com/company/soloway-tech
Instagram: www.instagram.com/soloway_tech
Cardonet
Cardonet delivers IT audit services for businesses in London and across the UK. Their audits provide an overview of how technology supports business operations, covering infrastructure, applications, security and suppliers. They review servers, desktops, networking, backup systems, telephony and hosting arrangements to understand how these elements fit together.
Their IT audit process includes discovery, analysis and recommendation stages. This can involve manual and automated checks, stakeholder interviews and asset inventories. They also assess IT governance, supplier costs and licensing arrangements. The outcome is typically a report outlining risks, system gaps and practical recommendations that can feed into a broader IT strategy.
Key Highlights:
Business focused IT audit approach
Review of infrastructure, applications and security
Ghost Enterprises provides IT audit services as part of its managed IT and cybersecurity offering. Their audits are carried out by in house consultants and focus on reviewing IT infrastructure, security controls and overall system effectiveness. The purpose is to assess whether existing technology can support current business operations and planned growth.
An IT audit from Ghost Enterprises can cover compliance, cybersecurity, workflows and procurement processes. They examine how systems are set up, identify weaknesses and suggest improvements to improve efficiency and resilience. The review also helps organisations understand where their IT aligns with business objectives and where adjustments may be needed.
EY provides audit, assurance and advisory services across a wide range of sectors. Within its audit practice, the firm works with listed companies, large private businesses and public interest entities. Their audit services combine financial statement review with technology enabled methods, including data analytics and digital tools that support risk assessment and reporting accuracy.
In the context of IT audit and technology risk, EY teams review IT controls, cybersecurity frameworks and governance structures that support financial and operational systems. This can include evaluating system access, change management, data integrity and regulatory compliance. Their work often links IT controls to broader enterprise risk and reporting requirements, especially where digital systems are central to business operations.
Key Highlights:
Global audit and assurance network
Integration of technology within audit methodology
IT controls and cybersecurity review capability
Experience with regulated and listed entities
Focus on governance and risk oversight
Services:
Financial audit
IT audit and technology risk review
Internal controls assessment
Cybersecurity and data risk evaluation
Regulatory compliance support
Contact information:
Website: www.ey.com
Address: EY 6 More London Place London SE1 2DA
Facebook: www.facebook.com/EY
Twitter: x.com/EYnews
LinkedIn: www.linkedin.com/company/ernstandyoung
Inflection Point
Inflection Point provides IT audit services as part of its managed IT support offering for SMEs across the UK. Their audits focus on reviewing infrastructure, licensing, security and backup processes. The goal is to understand how current systems are set up and whether they align with day to day business needs.
Their IT audits can include infrastructure checks, licensing reviews, support assessments and backup testing. They look at connectivity, patching, device management and general system health. The outcome is usually a set of practical recommendations that can help businesses improve reliability, reduce risk and plan future IT changes more clearly.
S&W delivers audit and assurance services with a focus on statutory audit, financial reporting and broader assurance engagements. Their work covers compliance requirements as well as non statutory assurance, pensions audit and royalty audit. They describe audit as more than a reporting exercise, linking it to governance, internal processes and risk awareness within organisations. Senior leadership involvement appears to be part of how they structure engagements, particularly for complex or changing businesses.
For organisations operating in Bristol, S&W can provide audit and assurance support either directly or through coordinated engagement teams. In terms of IT audit related activity, their assurance services can extend to reviewing internal reporting structures, control environments and systems that underpin financial information. This can be relevant for companies that need comfort over how technology and financial controls interact, especially where growth, investment or structural change is involved.
Key Highlights:
Audit and assurance focused practice
Statutory and non statutory audit services
Financial reporting expertise
Pension and royalty audit capability
Senior leadership involvement in engagements
Services:
Statutory audit
Non statutory audit
Financial reporting support
Assurance services
Pensions audit
Royalty audit
Contact information:
Website: www.swgroup.com
Phone: +44 151 829 7100
Address: Office 1.11, Clockwise, Edward Pavilion, Albert Dock, Liverpool L3 4AF
Twitter: x.com/S_W_Group
LinkedIn: www.linkedin.com/company/swgroupuk
Bishop Fleming
Bishop Fleming provides external audit services to a wide range of organisations, including corporate groups, owner managed businesses, not for profit entities and public sector bodies. Their audit teams focus on statutory audit work, structured planning and clear communication throughout the process. In addition to standard external audit engagements, they also deliver specialist audits such as grant audits, solicitors regulatory audits, pensions scheme audits and ATOL assurance services. The approach described across their materials centres on understanding how a business operates before forming conclusions, with attention given to risk assessment and data analysis.
With offices in several UK cities, including Bristol, Bishop Fleming has a visible regional presence alongside national coverage. For organisations in Bristol and the wider South West looking at IT audit or technology related assurance, their external audit and internal audit and risk assurance capabilities can support reviews of financial systems, internal controls and governance processes. Their work in this area connects financial reporting with the underlying systems that support it, which is often where IT audit becomes relevant in practice.
Key Highlights:
External audit services for a broad range of sectors
Specialist audits including grant and pensions audits
Structured audit process with interim work and data analysis
Grant Thornton UK delivers internal audit services as part of its wider business risk advisory offering. Their internal audit teams work on a risk based approach, providing independent assurance over controls, governance and emerging risks. They support organisations through co sourcing, outsourcing or short term resource support, depending on how the internal audit function is structured. Their materials also reference technology risk and subject matter specialists, which suggests that IT and digital risk reviews form part of their broader internal audit scope.
Operating across the UK and internationally, Grant Thornton UK works with organisations in different sectors, including financial services and public interest entities. In the context of IT audit services in the UK, their internal audit and technology risk professionals review control environments, regulatory compliance and third party risk. This can include assessments aligned with internal audit standards and evaluations of how technology supports business processes. The focus appears to be on structured assurance rather than one off reviews.
Key Highlights:
Risk based internal audit approach
Co source, outsource and staff support models
Technology risk and specialist input within audit teams
External quality assessments for internal audit functions
Ava Tech provides IT audit services focused specifically on reviewing technology infrastructure, security controls and compliance frameworks. Their audits cover system configuration, access controls, cyber security measures and business continuity planning. The process they describe includes planning, risk assessment, execution, reporting and post audit support. They also reference alignment with recognised standards such as ISO 27001, COBIT and GDPR, which positions their work clearly within IT governance and compliance.
Based in London with an additional office in Farnham, Ava Tech works with organisations across the UK. For companies seeking IT audit services in the UK, including those outside London, their offering centres on evaluating current IT setups, identifying weaknesses and recommending improvements to reduce risk. They also review third party dependencies and disaster recovery arrangements, which are common areas of concern in IT audit engagements. Their services are framed around practical system reviews rather than financial audit work.
Key Highlights:
Dedicated IT audit services
Focus on security controls and compliance
Alignment with ISO 27001, COBIT and GDPR
Structured audit process with reporting and follow up
Support across multiple sectors
Services:
IT infrastructure assessments
Cybersecurity audits
Compliance and governance reviews
Business continuity and disaster recovery assessments
TIAA provides IT audit services through a dedicated ICT specialist team that focuses on digital governance, cybersecurity and compliance. Their work covers digital risk assessments, software and database audits, cloud technology reviews, network infrastructure checks and assurance over digital transformation projects. They also carry out focused reviews around information governance and data protection, including support related to the Data Security and Protection Toolkit for organisations handling NHS data. Their materials place emphasis on independent scrutiny of complex IT environments, particularly where data protection, business continuity and incident response are concerned.
Across sectors such as housing, healthcare, education, charities and government, TIAA links IT audit to day to day operational risks. They review areas like cyber resilience, application controls, vulnerability scanning and disaster recovery planning. In practice, this means examining how systems are configured, how data is handled and whether governance arrangements are working as intended. Their approach to IT audit appears structured around risk, compliance and practical improvement rather than financial audit work.
Key Highlights:
Dedicated ICT and IT governance team
Focus on digital risk and cybersecurity
Experience with DSP Toolkit audits
Sector specific reviews across public and third sectors
Independent assurance over complex IT environments
Services:
IT and digital audits
Digital risk assessments
Cybersecurity and cyber resilience reviews
Cloud and network infrastructure audits
Information governance and GDPR reviews
Business continuity and disaster recovery assurance
Address: Artillery House, Fort Fareham, Newgate Lane Fareham, PO14 1AH
Twitter: x.com/TIAA_Ltd
LinkedIn: www.linkedin.com/company/tiaa-ltd
DORTUS UK
DORTUS UK describes IT audit as a process for evaluating information systems, security controls and compliance across an organisation. Their scope covers network security, data management, software development processes, system performance and regulatory compliance. They review areas such as firewall configurations, access controls, intrusion detection systems, backup procedures and incident management. The intention, as outlined in their materials, is to help organisations understand how their IT infrastructure performs and where risks may sit.
Their audit scope also includes risk assessment scanning, reporting services and evaluation against standards such as ISO 27001, ISO 22301, COBIT and ITIL. In addition to technical controls, they look at governance, vendor management, service level agreements and documentation practices. This positions their IT audit work around infrastructure reliability, data protection and alignment with legal and industry requirements.
Key Highlights:
Broad IT audit scope covering systems and processes
Network and security focused reviews
Alignment with recognised standards and frameworks
Risk assessment scanning and reporting services
Coverage of compliance and governance areas
Services:
IT risk assessments
Network infrastructure audits
Cybersecurity and access control reviews
Data protection and privacy audits
Compliance evaluations
Incident response and performance monitoring reviews
Address: 24-26, Queens Road, Reading, RG1 4AU, England
Zenith Audit
Zenith Audit is a specialist audit firm focused on the financial services sector. Their audit and assurance services include statutory audits, voluntary audits, group audits and internal audits. They also provide regulatory audits covering areas such as client assets, safeguarding and Solvency II. The firm positions itself as sector focused, working with financial institutions such as investment managers, funds, banks and payment service providers.
In the context of IT audit services, their internal and regulatory audits can involve reviewing control environments, systems supporting financial reporting and compliance with sector specific rules. For financial services organisations, technology systems are closely linked to regulatory obligations, so audit work often extends to examining how systems manage data, client assets and reporting processes. Their focus remains within financial services rather than general corporate IT infrastructure.
Corient Business Solutions provides outsourced audit support to accounting practices across the UK. Their work centres on preparing audit files, assisting with planning documentation, carrying out testing and helping firms stay aligned with UK regulatory requirements. They describe their role as supporting audit partners and reducing pressure on in-house teams by handling working papers, risk assessments, analytical procedures and documentation. The focus is on structured audit preparation and compliance rather than acting as the signing statutory auditor.
Their audit approach includes planning meetings, risk assessment, evidence gathering, substantive testing and drafting management letters. In practice, this means they work behind the scenes with accounting firms that need additional capacity or specialist support during audit season. For practices looking for IT related audit input, this can include reviewing controls, documentation and system related risks as part of the overall audit file preparation process.
Key Highlights:
Outsourced audit support for UK accounting practices
Sonar IT offers IT audit and compliance services with a focus on system visibility and risk identification. Their audits look at data access, patch management, endpoint security, user accounts and software compliance. The aim is to provide a clear view of how secure and up to date an organisation’s IT environment is. They position IT audit as a way to identify gaps that may otherwise go unnoticed, particularly in growing businesses where systems evolve quickly.
Based in London, Sonar IT works mainly with small to mid sized organisations. Their IT audit process includes reviewing security tools, checking for shadow IT, assessing policy alignment and producing reports that outline risks and recommended actions. They also support remediation where issues are identified. In the UK context, their work connects to regulatory compliance and insurer requirements, especially for businesses that need evidence of security controls.
Address: 124 City Rd, London EC1V 2NX, United Kingdom
Facebook: www.facebook.com/SonarITLtd
Linkedin: www.linkedin.com/company/28519584
MMBA
MMBA is a London based audit and accounting firm providing statutory, non statutory and internal audit services. Their audit work covers financial statement audits, compliance audits, regulatory audits and agreed upon procedures. They work with businesses across sectors and emphasise a structured audit process that includes planning, internal control evaluation, substantive testing and reporting. Their services extend beyond financial audits into advisory and compliance areas.
In the context of IT audit services in the UK, MMBA’s internal audit and compliance audit work can involve reviewing internal controls and systems that support financial reporting. For businesses in London and other UK locations, this may include assessing how accounting systems operate, how controls are documented and whether processes align with regulatory expectations. Their focus remains on financial audit and assurance, with IT considerations forming part of the wider control environment review.
HaysMac provides audit and assurance services to a broad range of organisations, including listed companies, public interest entities and charities. Their audit work centres on statutory audits, financial reporting and sector specific assurance. They describe their approach as combining sector knowledge with structured audit processes and the use of data analytics tools. Their audit teams include partners and directors who lead engagements across different industries such as financial services, education, hospitality and social purpose organisations.
In the UK audit market, HaysMac operates as a large independent practice outside the Big Four. Their audits involve reviewing financial statements, internal controls and governance frameworks in line with regulatory standards. While their core service is financial audit, technology and data analytics form part of their methodology, particularly in how they analyse financial information and assess risk. Their work is mainly focused on statutory and listed company audit rather than stand alone IT infrastructure audits.
Charnwood Accountants is a Leicestershire based firm providing accountancy, tax and audit related services to local and national businesses. Their audit work includes grant audits and Solicitors Regulation Authority accounts rules audits, alongside compliance and financial reporting services. The firm positions itself as working closely with business owners on financial performance, planning and regulatory matters.
In the context of audit services in the UK, Charnwood’s offering sits mainly within financial compliance and statutory requirements rather than specialist IT audit. Their audits focus on reviewing financial records, ensuring compliance with relevant regulations and supporting businesses with reporting obligations. For companies where IT systems underpin accounting processes, audit work may include reviewing internal controls and documentation linked to those systems.
Address: The Point, Granite Way, Mountsorrel, Leicestershire, LE12 7TZ
Facebook: www.facebook.com/CharnwoodAccountants
Twitter: x.com/charnaccountant
Cox Hinkins
Cox Hinkins offers audit services in Oxford, working with small and growing businesses that require statutory or external audits. Their services include external audit, statutory audit and compliance reviews aligned with UK GAAP and IFRS. They describe their role as providing independent assessment of financial statements and issuing audit opinions where required.
For businesses in Oxford and surrounding areas, Cox Hinkins provides audit support that covers financial reporting accuracy, compliance with legal standards and reconciliation between accounting frameworks where needed. Their audit services are focused on financial statements and regulatory compliance rather than dedicated IT audit reviews. However, as part of statutory audit work, they assess internal controls and systems that support financial reporting, which can include elements of system review where relevant.
Address: The Old Dairy, 12 Stephen Rd, Headington, Oxford OX3 9AY, United Kingdom
Facebook: www.facebook.com/people/Coxhinkins
LinkedIn: www.linkedin.com/company/coxhinkins
Instagram: www.instagram.com/coxhinkins
Protiviti
Protiviti provides internal audit and advisory services to organisations across the UK, with a focus on risk, controls and governance. Their internal audit offering includes technology audit, controls advisory, fraud risk management and SOX related work. They support audit committees and executive teams through outsourced, co-sourced and staff augmentation models, depending on how an internal audit function is structured. Their services combine risk based audit planning with the use of data analytics and technology enabled tools.
In the area of IT audit, Protiviti works on technology risk, IT governance and compliance reviews. This includes assessing controls around systems, cybersecurity, data privacy and regulatory requirements. They also advise on audit transformation and innovation, helping organisations modernise their internal audit approach. Their work tends to sit at the intersection of internal audit, enterprise risk and technology oversight rather than pure financial statement audit.
Key Highlights:
Internal audit and risk advisory focus
Technology audit and IT risk capability
Outsourced and co sourced audit models
SOX and controls advisory experience
Use of data analytics and audit technology
Services:
Internal audit services
Technology and IT audit
Controls advisory
Fraud risk management
SOX compliance support
Audit transformation and innovation
Contact information:
Website: www.protiviti.com
Phone: +44.20.7930.8808
Address: The Shard, 32 London Bridge St, London SE1 9SG, United Kingdom
Facebook: www.facebook.com/Protiviti
Twitter: x.com/ProtivitiUK
LinkedIn: www.linkedin.com/company/protiviti-uk-
Instagram: www.instagram.com/protiviti.uk
Moore Kingston Smith
Moore Kingston Smith delivers audit and assurance services to corporate, listed, nonprofit and private equity backed organisations. Their audit work includes statutory audit, financial reporting and royalty audits, with experience across IFRS, UK GAAP and US GAAP reporting environments. They also reference the use of data analytics and AI within their audit methodology, combining technical knowledge with sector based teams.
Within the broader audit and assurance space, their services include reviewing financial statements, internal controls and compliance with accounting standards. While their main focus is financial audit, their technology enabled audit tools form part of how they assess risk and reporting accuracy. Their audit practice operates as part of a global network, which can be relevant for organisations with cross border operations.
AKI Solutions Limited provides Information Technology Audit services as part of its broader ICT consulting offering. Their IT audits cover governance, information security, systems and applications, IT processes and regulatory compliance. They review technical controls, policies and procedures to assess availability, confidentiality and integrity of systems and data. Their scope also includes privacy assessments and evaluations against standards such as ISO 27001 and GDPR.
Their approach to IT audit combines technical review with process level assessment. Services include vulnerability assessments, penetration testing, application code reviews and risk assessments. They also offer IT audit outsourcing and co-sourcing models for organisations that require ongoing support. The focus of their IT audit work is on identifying control gaps, assessing maturity and supporting compliance with recognised standards.
If there is one thing that stands out when looking at IT audit services companies in the UK, it is how different their approaches can be. Some firms sit closer to traditional audit and risk advisory, where IT controls are reviewed alongside financial reporting and governance. Others focus more directly on infrastructure, cybersecurity and day to day system performance. It really depends on what a business is trying to solve.
For some organisations, an IT audit is about meeting regulatory expectations or reassuring stakeholders. For others, it is more practical - fixing slow systems, tightening security, or simply understanding what they are paying for and why. A growing business might need a broad strategic review, while a smaller company may just need a clear picture of its infrastructure and risks.
In the end, an IT audit should not feel like a box ticking exercise. At its best, it gives management a clearer view of how technology supports the business and where it might quietly be creating risk. And sometimes, that outside perspective - even if it confirms most things are fine - is exactly what a company needs to move forward with more confidence and fewer blind spots.
AC
Written by the Acumon team
Acumon is an ICAEW-registered firm of chartered accountants and registered auditors
based in London, with offices in Pitstone, Aylesbury and Bournemouth. Need advice on
anything covered here? Talk to us.
Aberdeen’s business landscape has changed noticeably over the last decade. While the city remains closely associated with energy and offshore industries, organisations across the region are also…
In Liverpool’s busy business environment, companies depend more than ever on complex IT systems, cloud platforms, and digital processes. A proper IT audit is now essential to uncover weaknesses…
Bristol has grown into a real hub for tech and innovation, with plenty of businesses relying on solid IT systems to stay competitive. As companies handle more data, cloud setups, and cyber…
Read article
Get in Touch
Ready for Accountants Who Move Your Business Forward?
Tell us what you need. Within one business day, a qualified accountant will be in touch to talk it through and give you a clear, fixed-fee quote — no obligation.
We use essential cookies to run this site, plus Google Analytics and Google Ads to
understand how visitors use it and measure our advertising — only with your consent. See our
Privacy Policy.
