What are the leading consulting firms in the UK for Cyber Security services? The top Cyber Security consulting firms in the UK ranking presents the region’s most trusted, expert and influential consultancy firms in the domain for the year 2025.
The capabilities of consulting firms is based on the views of executives and consultants active in Cyber Security, as well as on assessments of Cyber Security capabilities, company reputation, analyst benchmarks, industry recognitions, thought leadership and more (see the methodology for details).
View all rankings: Top consulting firms in the UK 2025.
The top consulting firms in the UK for Cyber Security services:
Over 500+ consulting firms were assessed for the Cyber Security ranking in 2025, of which 46 qualify as a top player:
Diamond level
Inactive
Accenture
Accenture does not have an active company profile on Consultancy.uk....
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Inactive
EY
The company profile of EY on Consultancy.uk is currently not activated....
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Inactive
Deloitte
Deloitte is not a partner of Consultancy UK....
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Inactive
BAE Systems Digital Intelligence
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Inactive
IBM Consulting
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CGI
Founded in 1976, CGI is among the largest independent IT and business consulting services firms in the world. With 90,000 consultants and professionals across the globe, CGI delivers an end-to-end portfolio of capabilities, from business consulting and strategic IT to ...
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Platinum level
Inactive
PwC
PwC does not have an active profile on Consultancy.uk....
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Inactive
Capgemini
The company profile of Capgemini on Consultancy.uk is currently not activated....
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Inactive
KPMG
KPMG is not a partner of Consultancy UK....
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Inactive
Atos
The company profile of Atos on Consultancy.uk is currently not activated....
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Inactive
Cognizant
The company profile of Cognizant on Consultancy.uk is currently not activated....
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Inactive
S-RM
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Inactive
Marsh
The company profile of Marsh on Consultancy.uk is currently not activated....
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Inactive
Wavestone
The Company profile of Wavestone on Consultancy.uk is currently not activated....
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Inactive
Bridewell
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Inactive
Fujitsu
Fujitsu does not have an active company profile on Consultancy.uk....
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Gold level
Inactive
BDO
The Company profile of BDO on Consultancy.uk is currently not activated....
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McKinsey & Company
McKinsey & Company is a global management consulting firm. We are the trusted advisor to the world's leading businesses, governments, and institutions. We strive for world-shaping client impact We work with leading organizations across the private, public and social se...
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Inactive
Boston Consulting Group
The company profile of Boston Consulting Group on Consultancy.uk is currently not activated....
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Inactive
Protiviti
The company profile of Protiviti on Consultancy.uk is currently not activated....
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Inactive
Aon
The company profile of Aon on Consultancy.uk is currently not activated....
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Inactive
Kroll
The Company profile of Kroll on Consultancy.uk is currently not activated....
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Inactive
Bain & Company
Bain & Company is not a partner of Consultancy UK....
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CYPFER
At CYPFER, we’re your trusted incident response experts, swiftly neutralizing ransomware threats, mitigating business email compromises, investigating cloud and web breaches, and keeping a vigilant eye on dark web activities. Our focus? Rapid recovery and unwavering pr...
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Inactive
Thoughtworks
The Company profile of Thoughtworks on Consultancy.uk is currently not activated....
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PA Consulting
We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our diverse teams of experts combine innovative thinking and breakthrough technologies to progress further...
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Inactive
Gemserv
The company profile of Gemserv on Consultancy.uk is currently not activated....
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Inactive
Sia
The Company profile of Sia Partners on Consultancy.uk is currently not activated....
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Inactive
Mason Advisory
Mason Advisory does not have an active company profile on Consultancy.uk....
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Inactive
Tata Consultancy Services
The company profile of Tata Consulting Service on Consultancy.uk is currently not activated....
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Inactive
Net Consulting
Net Consulting does not have an active company profile on Consultancy.uk....
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Silver level
Inactive
Northdoor
Northdoor does not have an active company profile on Consultancy.uk....
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Inactive
Capita
The company profile of Capita on Consultancy.uk is currently not activated....
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Inactive
Wipro
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Inactive
DXC Technology
The company profile of DXC Technology on Consultancy.uk is currently not activated....
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Inactive
Kyndryl
The company profile of Kyndryl is not activated on Consultancy.uk....
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Inactive
Xcina Consulting
The company profile of Xcina Consulting is not activated on Consultancy.uk....
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Inactive
Logiq
Logiq Consulting does not have an active company profile on Consultancy.uk....
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Inactive
Node4
Node4 does not have an active company profile on Consultancy.uk....
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Inactive
Turnkey Consulting
Turnkey Consulting does not have an active company profile on Consultancy.uk....
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Inactive
Infosys
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Bronze level
Inactive
NTT Data
The company profile of NTT Data on Consultancy.uk is currently not activated....
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Inactive
Devoteam
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Inactive
Sopra Steria
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Inactive
HCLTech
The company profile of HCLTech on Consultancy.uk is currently not activated....
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Inactive
Acuity
The company profile of Acuity is not activated on Consultancy.uk....
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