This guide takes you through IT audit services companies in London, starting with a practical look at what they offer and who they usually serve. It’s not a ranked list or head-to-head comparison – just a neutral overview to help you get a feel for the options out there. Companies in this space range from those handling wide-ranging technology risk and assurance work for bigger organisations to more specialised players focused on things like cybersecurity frameworks, third-party risk, or specific compliance areas. What ties them together is the emphasis on independent assessments of key technology risk elements: cybersecurity controls, data protection and GDPR compliance, IT governance and strategic alignment, system access security, business continuity and disaster recovery, and third-party IT risk. The aim here is straightforward – give you enough clear context on their typical approach, client types, and main focus areas so you can decide which direction makes sense for your own situation.
Acumon
Acumon is a UK-based chartered accountants company located in West London, providing IT risk audit and assurance services as part of its Risk & Tech Assurance suite. The company supports CFOs and Finance Directors across the UK, with a strong presence serving London businesses and some international clients. IT risk engagements follow a structured approach based on deep technical and audit expertise, delivering independent technology risk assessments and assurance to strengthen risk management frameworks.
Acumon holds relevant expertise aligned with UK regulations, particularly GDPR for data protection, and addresses business priorities in cybersecurity resilience, IT governance, and operational continuity. In the dynamic London market, where digital threats and regulatory scrutiny are high, Acumon helps organisations maintain robust technology controls and compliance. The service suits companies navigating complex IT environments in the capital’s competitive landscape.
IT risk audit engagements are typically led by experienced professionals with direct involvement throughout the process. The methodology emphasises flexible engagement models, rapid project mobilisation, and cross-sector IT risk experience to ensure practical, tailored outcomes.
IT Risk Audit Capabilities:
Acumon provides IT risk audit and assurance across a range of technology risk areas. These include:
- Cybersecurity frameworks and controls
- Data protection and GDPR compliance
- IT governance and strategic alignment
- System access controls and security
- Business continuity and disaster recovery
- Third-party IT risk management
The service is delivered by professionals with deep technical and audit expertise, with direct involvement throughout the engagement.
Regulatory and Compliance Aspects:
Acumon aligns its IT risk services with key UK regulatory requirements. These include:
- GDPR compliance for data protection
- Broader cybersecurity and governance standards relevant to UK businesses
These aspects enable the company to support organisations operating in the UK and London, where data protection and technology risk oversight are critical.
Core IT Risk Services:
In addition to comprehensive IT risk audit and assurance, Acumon provides focused assessments that support technology risk management. These include:
- Independent assessment of cybersecurity frameworks and controls
- Independent assessment of data protection and GDPR compliance
- Independent assessment of IT governance and strategic alignment
- Independent assessment of system access controls and security
- Independent assessment of business continuity and disaster recovery
- Independent assessment of third-party IT risk management
IT risk work is often delivered alongside discussions with finance leaders regarding technology risk requirements and control frameworks.
Supporting Organisations with Technology Risks:
Many organisations encounter increasing technology risk challenges as they grow and rely more on digital systems. Acumon works with businesses that are:
- facing cybersecurity threats and needing framework assessments
- requiring GDPR compliance assurance for data protection
- seeking stronger IT governance and strategic alignment
- addressing system access security vulnerabilities
- planning business continuity and disaster recovery capabilities
- managing risks from third-party IT providers
Early engagement with an IT risk audit service can help ensure that technology controls and risk management processes are aligned with organisational needs and regulatory expectations.
Contact Information:
- Website: acumon.com
- Phone: 020 8567 3451
- Email: [email protected]
- Address: 1-2 Craven Road, Ealing, London, W5 2UA, UK
Deloitte
Deloitte provides IT and specialised assurance services that focus on managing technology-related risks through independent assessments and controls evaluation. The company performs IT controls reviews, including design and operating effectiveness testing for general controls and automated processes in systems like ERPs. It also offers third-party assurance and service organisation controls reporting to address security, availability, processing integrity, confidentiality, and privacy concerns.
Services include digital controls management using analytics and automation to strengthen technology monitoring. IT risk management covers identifying risks, building frameworks, optimising controls, and embedding processes through training and remediation. Third-party assurance delivers reporting on outsourced services based on standards like SOC, ISAE, and custom requirements. The approach emphasises independent evaluation of cybersecurity frameworks, data protection, and related controls without venturing into unrelated areas.
Key Highlights:
- Independent IT controls evaluation
- Third-party assurance reporting
- SOC and custom assurance reports
- Cybersecurity and privacy focus
- Analytics-driven risk monitoring
Services:
- IT controls evaluation
- Third-party assurance services
- Service organisation controls reporting
- Digital controls management
- IT risk management framework
- Automated controls optimisation
PwC
PwC provides technology risk assurance and cyber controls assurance services, helping organisations independently assess and validate the effectiveness of IT controls, cybersecurity measures, and operational resilience. The firm conducts benchmarking of controls against standards such as NIST and ISO 27001, and prepares independent assurance reports including SOC 2 and ISAE 3000/3402 covering security, availability, processing integrity, confidentiality, and privacy.
Services include evaluation of cybersecurity maturity, development of governance frameworks for technology risks, testing of control design and operating effectiveness, and attestation reporting for internal and third-party stakeholders. This approach supports risk reduction and compliance in the context of GDPR, operational resilience, and broader technology risk management.
Key Highlights:
- Independent controls validation
- Cyber controls assurance and benchmarking
- Attestation reporting (SOC, ISAE)
- Technology risk assessment
- Governance framework support
Services:
- Cyber controls assurance
- Technology risk advisory and assessment
- SOC 2 and ISAE attestation reporting
- Controls design and effectiveness testing
- Cybersecurity maturity evaluation
- Risk reduction assurance
EY
EY offers technology risk services that help organisations identify, assess, and mitigate risks from technology use through audit, attestation, and assessment work. The company executes IT audit procedures to understand technology impacts on business processes and controls. It provides attestation services for security, privacy, confidentiality, availability, and processing integrity.
Services include IT audit support for integrated and financial statement processes. Attestation covers controls around cybersecurity and data protection. Technology risk management involves assessing and implementing frameworks for IT risks. Cybersecurity assurance evaluates cyber risk posture and capabilities. The work focuses on building trust through independent reviews of technology-related controls and compliance.
Key Highlights:
- IT audit procedures
- Attestation for controls
- Cybersecurity risk posture
- Technology risk frameworks
- Independent assessments
Services:
- IT audit
- Attestation services
- Cybersecurity assurance
- IT risk management
- Controls assessment
- Technology risk mitigation
KPMG
KPMG delivers technology risk management and controls assurance services with a strong emphasis on IT internal audit, business systems controls review, and independent evaluation of technology-related risks. The firm performs testing of control design and operating effectiveness, supplier risk assurance, shared service controls validation, and assurance over cybersecurity and data privacy risks.
Services cover IT internal audit, technology risk frameworks, business systems controls assessment, penetration testing in an assurance context, privacy compliance strategy, and attestation-style reporting. The approach combines independent assurance with practical insights to support governance, regulatory compliance, and stakeholder confidence.
Key Highlights:
- IT internal audit and controls assurance
- Technology risk assessment
- Business systems controls testing
- Cyber assurance and privacy compliance
- Independent validation of controls
Services:
- IT internal audit
- Controls assurance (technology and cyber focused)
- Technology risk management
- Supplier and shared service assurance
- Cybersecurity controls evaluation
- Operational resilience assurance
Protiviti
Protiviti delivers internal audit services with a strong emphasis on technology audit to address IT risk, governance, and compliance. The company assesses and mitigates key technology risks through specialist audit and controls work. It supports data-driven audits using modern tools and approaches.
Services cover IT and cybersecurity audits examining general controls, application controls, data integrity, identity and access management, and cyber resilience. Technology governance reviews ensure alignment with objectives. Cybersecurity and data privacy expand coverage of threats and third-party risks. Controls advisory designs and tests programmes for compliance and risk management. The focus remains on technology-specific internal audit elements.
Key Highlights:
- Technology audit specialists
- IT controls assessment
- Cybersecurity audits
- Data privacy coverage
- Controls advisory
Services:
- Technology audit
- IT general controls review
- Cybersecurity audits
- Data integrity assessment
- Identity and access management
- Cyber resilience testing
Grant Thornton
Grant Thornton provides internal audit services with a dedicated focus on technology risk, drawing on integrated expertise and subject matter specialists in IT assurance and cyber-related areas. The company addresses emerging technology risks and oversight responsibilities, particularly as boards respond to updated UK governance codes that place greater emphasis on technology and cyber governance. It delivers assurance on how technology risks are managed, including assessments of controls, risk maturity, and integration within business processes and culture.
The service centres on technology risk assessments within internal audit engagements, covering areas such as IT controls, cyber risk management, and governance practices. Work includes evaluating the effectiveness of controls and providing insights into technology risk priorities. The approach remains grounded in audit standards and risk-focused reviews, with emphasis on technology-related assurance rather than broader non-audit advisory.
Key Highlights:
- Technology risk oversight
- Integrated experts
- Emerging risk assurance
- Collaborative solutions
- Value-added insights
Services:
- Internal audit with technology focus
- Technology risk management
- Cyber governance support
- Risk oversight assurance
Sonar IT
Sonar IT delivers IT audit and compliance services tailored for small to mid-sized businesses in London. The company performs deep assessments of systems to highlight what functions well and where issues exist. Audits examine data access, patch levels, endpoint security, and overall system health.
Reporting provides clear recommendations and practical steps for improvement. Tools help flag problems quickly across security and compliance aspects. Services include support to address identified issues beyond just reporting. Focus remains on giving clarity and control over IT environment risks.
Key Highlights:
- SMB-focused audits
- Endpoint security checks
- Clear recommendations
- Issue resolution support
- System health assessment
Services:
- Data security assessment
- User access review
- Vulnerability identification
- Compliance checks
- Cybersecurity risk assessment
The Final Step
The Final Step offers IT audits as part of its managed and outsourced IT services for businesses in London. Audits examine technology setups to identify risks and compliance gaps. The company provides consulting on IT audit needs for operational security and efficiency.
Services concentrate on reviewing controls and processes in IT environments. Work includes assessments that support better decision-making around technology risks. The approach aims to uncover potential issues in security and management practices.
Key Highlights:
- IT risk identification
- Compliance gap checks
- Operational security focus
- Practical assessments
Services:
- IT audit consulting
- Security process review
- Risk management assessment
- Controls evaluation
PKF Littlejohn
PKF Littlejohn includes IT assurance within its audit and assurance offerings, covering cyber security and data protection. The company provides assurance on internal controls with an IT element. Services address technology-related aspects in governance and risk contexts.
IT assurance focuses on cyber security measures and data protection practices. The work supports overall assurance without separating into standalone IT audits. Emphasis remains on integrated controls evaluation.
Key Highlights:
- IT assurance inclusion
- Cyber security coverage
- Data protection focus
Services:
- IT assurance
- Cyber security assurance
- Data protection assurance
- Internal controls assurance
Ava Tech
Ava Tech delivers IT audit services through comprehensive assessments of technology infrastructure and controls. The company examines security, compliance, and resilience aspects to identify risks and gaps. Audits align IT with business objectives and standards.
Coverage includes evaluation of security controls, general controls across platforms, business continuity and disaster recovery planning, cybersecurity frameworks, and compliance with ISO 27001, COBIT, and GDPR. The process involves planning, risk assessment, execution, detailed reporting, and ongoing support for implementation. Recommendations address vulnerabilities and improvements. Services extend to tailored industry approaches.
Key Highlights:
- Comprehensive IT assessments
- Cybersecurity vulnerability checks
- Compliance with standards
- Disaster recovery evaluation
- Tailored recommendations
Services:
- Security audits
- Business continuity planning
- Disaster recovery strategies
- GDPR compliance review
- Access controls assessment
- ISO 27001 alignment
- COBIT framework evaluation
IT Support UK
IT Support UK provides IT audit, vulnerability, and compliance services for businesses in London. Audits review infrastructure, networks, user access, data protection, and policies to uncover issues. The company delivers prioritised reports with practical action plans.
Assessments cover servers, cloud platforms, vulnerability scanning, identity management, backup processes, and policy documentation. Work aligns with standards like UK GDPR, Cyber Essentials, and ISO 27001. Process includes discovery discussions, on-site/remote reviews, analysis, and remediation support if needed. Focus stays on practical security and compliance improvements.
Key Highlights:
- Vulnerability scanning
- User access review
- Data protection checks
- Policy evaluation
- Compliance alignment
- London-based support
Services:
- Infrastructure review
- Network security assessment
- Vulnerability and risk analysis
- Backup and data protection
- Identity management audit
- Policies and procedures review
Ghost Enterprises
Ghost Enterprises conducts IT security audit services in London to assess technology infrastructure and processes. The company identifies faults in systems and offers recommendations for technical improvements. Audits evaluate security, compliance, risks, data management, and performance.
Areas reviewed include cybersecurity measures like firewalls and encryption, access controls, data handling and backups, regulatory compliance, and system efficiency. The service aims to strengthen security and ensure alignment with business needs. Assessments help define IT strategy for growth.
Key Highlights:
- Security measure review
- Compliance verification
- Risk identification
- Data management check
Services:
- Cybersecurity assessment
- Access controls review
- Data backup evaluation
- Compliance checks
- Risk management analysis
Opticore IT
Opticore IT offers network audit services as a structured assessment of IT infrastructure with emphasis on performance, design, security, and compliance. The company uses automated discovery tools alongside expert analysis to map topology and examine configurations. Audits reveal inefficiencies, vulnerabilities, misconfigurations, and outdated elements across wired, wireless, data centre, and cloud environments.
The process begins with automated discovery and data validation, followed by a comprehensive audit report. Findings come with prioritised remediation actions and risk scores. A stakeholder workshop presents results and discusses strategic next steps. This differs from basic health checks by delivering detailed analysis and remediation planning. Coverage includes security reviews, performance analysis, and alignment with frameworks like ISO 27001 or GDPR.
Key Highlights:
- Network discovery mapping
- Security vulnerability checks
- Performance bottleneck identification
- Configuration review
- Remediation recommendations
- Compliance alignment
Services:
- Full network discovery
- Security and compliance review
- Performance analysis
- Configuration and device review
- Remediation planning
- Stakeholder workshop
Micro Pro
Micro Pro conducts audits and reviews focused on IT systems to provide independent assurance and improve operations. The company assesses risks, identifies vulnerabilities, and evaluates potential impacts from compromises. Audits cover security infrastructure, processes, and regulatory compliance for data security.
Work includes gathering information on existing systems and controls, followed by planning and execution. Risk-based IT audits incorporate external penetration testing and vulnerability testing from internal and external perspectives. Cloud and virtualization environments receive specific attention. Findings appear in a comprehensive report with recommendations to minimise risks and enhance IT value. Client discussions explain risks, breach impacts, and steps forward.
Key Highlights:
- Risk-based approach
- Penetration testing inclusion
- Vulnerability identification
- Compliance assessment
- Objective recommendations
Services:
- Risk-based IT audit
- External penetration testing
- Vulnerability assessment
- Cloud environment review
- IT systems review
- Regulatory compliance check
Conclusion
Choosing an IT audit services company in London comes down to your business size, industry, how mature your current processes are, and what regulatory pressures you face. Some companies bring a broader, integrated view of technology risks and controls, while others concentrate on very specific areas like cybersecurity frameworks or third-party risk management. This guide simply lays out the landscape so you can see the range of approaches without any ranking or preference implied. The right partner delivers independent assurance and practical steps to reduce risks and support resilience. Ultimately, the fit depends on what your organisation actually needs right now and how you want to approach technology risk management going forward. Take the time to match the offering to your situation, and the decision becomes clearer.