CrowdStrike and
Mandiant are the top choices for cybersecurity consulting. CrowdStrike suits organisations requiring rapid incident response driven by endpoint telemetry and automated threat intelligence. Mandiant is ideal for enterprises targeted by advanced persistent threats and nation state actors needing deep forensic investigations.
Top 10 Cybersecurity Consulting Agencies, compared| RANK | ENTRY | BEST FOR | SCORE | FROM |
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| 1 |  CrowdStrikePioneered cloud native endpoint protection via the lightweight Falcon agent. | Endpoint security and rapid incident response | 95.0 | Custom |
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| 2 |  MandiantAcquired by Google in 2022 to bolster Google Cloud security offerings. | Complex forensic investigations and advanced threat detection | 92.7 | Custom |
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| 3 |  DeloitteRecognised globally as a leader in security consulting services by major analyst firms. | Enterprise wide risk management and regulatory compliance | 90.3 | Custom |
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| 4 |  AccentureOperates one of the largest networks of dedicated cyber fusion centres worldwide. | Forbes Global 2000 companies and government bodies handing over a whole function on a longer-term contract, particularly where one supplier needs to run finance, procurement, HR and IT operations across many countries at the same time. | 88.0 | – |
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| 5 |  PwCCombines traditional auditing heritage with advanced technical security testing. | Governance, risk and compliance advisory | 85.7 | Custom |
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| 6 |  IBM SecurityUtilises Watson artificial intelligence to accelerate threat detection and response. | AI driven security operations and threat management | 83.3 | Custom |
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| 7 |  KPMGStrong specialisation in securing cloud transformations for financial institutions. | Financial sector cybersecurity and data privacy compliance | 81.0 | Custom |
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| 8 |  EYKnown for their proprietary holistic cyber maturity assessment frameworks. | Cybersecurity strategy and operational resilience | 78.7 | Custom |
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| 9 |  SecureworksBacked by decades of counter threat unit research and operational history. | Managed detection and response services | 76.3 | Custom |
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| 10 |  CoalfireMarket leader in helping technology vendors achieve FedRAMP authorisation. | Cloud compliance and FedRAMP advisory | 74.0 | Custom |
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How to choose
Start from what you need it for. Where each entry fits best:
- CrowdStrike (#1): Endpoint security and rapid incident response
- Mandiant (#2): Complex forensic investigations and advanced threat detection
- Deloitte (#3): Enterprise wide risk management and regulatory compliance
- Accenture (#4): Forbes Global 2000 companies and government bodies handing over a whole function on a longer-term contract, particularly where one supplier needs to run finance, procurement, HR and IT operations across many countries at the same time.
- PwC (#5): Governance, risk and compliance advisory
- IBM Security (#6): AI driven security operations and threat management
- KPMG (#7): Financial sector cybersecurity and data privacy compliance
- EY (#8): Cybersecurity strategy and operational resilience
- Secureworks (#9): Managed detection and response services
- Coalfire (#10): Cloud compliance and FedRAMP advisory
Each entry's full verdict is below.
The ranking, in detail
01
We stop breaches
CrowdStrike offers market leading endpoint protection, threat intelligence and incident response services powered by their proprietary Falcon platform.
From CustomBest for: Endpoint security and rapid incident response
PROS- Exceptional threat intelligence capabilities
- Fast remote incident response deployment
CONS- High cost for smaller businesses
95.0
02
Make your organization immune to compromise
Now part of Google Cloud, Mandiant provides world class cyber defense, threat intelligence and frontline incident response expertise.
From CustomBest for: Complex forensic investigations and advanced threat detection
PROS- Unrivaled frontline intelligence on threat actors
- Deep expertise in nation state attacks
CONS- Services are priced at a premium
92.7
03
Make an impact that matters
Deloitte delivers extensive cyber risk advisory, strategic transformation, and managed security services for large multinational enterprises.
From CustomBest for: Enterprise wide risk management and regulatory compliance
PROS- Global scale and multidisciplinary expertise
- Strong focus on business alignment
CONS- Engagement models can be bureaucratic
90.3
04
Runs finance, HR, procurement and IT for large firms
Accenture Security offers end to end cybersecurity solutions ranging from managed detection to large scale digital transformation.
Best for: Forbes Global 2000 companies and government bodies handing over a whole function on a longer-term contract, particularly where one supplier needs to run finance, procurement, HR and IT operations across many countries at the same time.
PROS- Managed services is close to half of Accenture's revenue ($34.57bn of a $69.67bn total in the year to 31 August 2025) and grew 9% against 6% for consulting, so it is a core business rather than a side offering of a consulting firm
- Breadth under one supplier: finance operations, sourcing and procurement, talent and HR, customer service, supply chain, risk and compliance, plus application, infrastructure, data and cybersecurity managed services all sit in the same practice, serving clients in more than 120 countries from offices and operations in 52
CONS- Nothing about the commercial terms is public and the account base is long settled. Accenture publishes no rate card, price or minimum engagement size on its managed services pages or in its 10-K, its revenue is derived primarily from Forbes Global 2000 companies and governments, and 195 of its top 200 clients have been with it for 10 or more years. A smaller or first-time buyer cannot size the cost before contacting sales, and sits well outside that core.
88.0
05
Building trust in society and solving important problems
PwC provides trusted cybersecurity consulting, helping organisations build resilience, manage trust, and navigate complex regulations.
From CustomBest for: Governance, risk and compliance advisory
PROS- Strong board level reporting frameworks
- Comprehensive regulatory knowledge
CONS- Less focus on standalone technical product implementation
85.7
06
Innovate with confidence
IBM Security integrates advanced artificial intelligence, X Force threat intelligence, and comprehensive managed security services.
From CustomBest for: AI driven security operations and threat management
PROS- Advanced proprietary threat intelligence
- Strong portfolio of enterprise software tools
CONS- Steep learning curve for proprietary platforms
83.3
07
Inspire confidence, empower change
KPMG delivers tailored cyber security, privacy, and business resilience services to protect critical data and infrastructure.
From CustomBest for: Financial sector cybersecurity and data privacy compliance
PROS- Deep industry sector knowledge
- Pragmatic approach to risk management
CONS- Consultancy rates are high
81.0
08
Building a better working world
EY helps organisations transform their cybersecurity programs to protect digital assets, maintain trust and create secure growth.
From CustomBest for: Cybersecurity strategy and operational resilience
PROS- Holistic view of enterprise risk
- Strong focus on measurable business outcomes
CONS- Project delivery times can sometimes stretch
78.7
09
Secure your world
Secureworks offers threat detection and response solutions driven by their Taegis security analytics platform.
From CustomBest for: Managed detection and response services
PROS- Effective open XDR platform
- Reliable 24/7 managed monitoring
CONS- Interface requires familiarity to navigate efficiently
76.3
10
Cyber risk advisory and assessment
Coalfire specialises in cyber risk advisory, compliance assessments, and technical testing for cloud environments.
From CustomBest for: Cloud compliance and FedRAMP advisory
PROS- Exceptional depth in cloud security compliance
- Efficient technical testing methodologies
CONS- Narrower focus outside of compliance and cloud advisory
74.0
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Frequently asked questions
What is the difference between a cybersecurity vendor and a cybersecurity consultant?
Cybersecurity vendors primarily sell software products or hardware appliances. Cybersecurity consultants provide strategic advice, risk assessments, architecture design, and managed services to help organisations secure their environments.
How much do cybersecurity consulting services typically cost?
Pricing varies significantly based on the scope of work, ranging from a few thousand pounds for a basic vulnerability assessment to millions of years for enterprise wide managed security operations and transformation programs.
How do I choose the right cybersecurity agency for my business?
Assess your specific requirements such as regulatory compliance, cloud migration, or incident response readiness, and select an agency with a proven track record, relevant industry certifications, and case studies matching your sector.
Sources
Where we checked each company's facts, and when.