Top Cyber Security consulting firms in the UK 2023

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 2023.

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 2023.

The top consulting firms in the UK for Cyber Security services:

2023 ranking
List view
Over 200+ consulting firms were assessed for the Cyber Security ranking in 2023, of which 41 qualify as a top player:

Diamond level

Platinum level

IBM Consulting
The company profile of IBM on Consultancy.uk is currently not activated....
Capgemini
The company profile of Capgemini on Consultancy.uk is currently not activated....
KPMG
KPMG is not a partner of Consultancy UK....
Atos
The company profile of Atos on Consultancy.uk is currently not activated....
Cognizant
The company profile of Cognizant on Consultancy.uk is currently not activated....
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...
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 ...
Boston Consulting Group
The company profile of Boston Consulting Group on Consultancy.uk is currently not activated....
Marsh
The company profile of Marsh on Consultancy.uk is currently not activated....
Bain & Company
Bain & Company is not a partner of Consultancy UK....
S-RM
S-RM does not have an active company profile on Consultancy.uk....

Gold level

BDO
The Company profile of BDO on Consultancy.uk is currently not activated....
Wavestone
The Company profile of Wavestone on Consultancy.uk is currently not activated....
Bridewell
Bridewell does not have an active company profile on Consultancy.uk....
Devoteam
The company profile of Devoteam on Consultancy.uk is currently not activated....
Aon
The company profile of Aon on Consultancy.uk is currently not activated....
Thoughtworks
The Company profile of Thoughtworks on Consultancy.uk is currently not activated....
Fujitsu
Fujitsu does not have an active company profile on Consultancy.uk....
Protiviti
The company profile of Protiviti on Consultancy.uk is currently not activated....
Gemserv
The company profile of Gemserv on Consultancy.uk is currently not activated....
Sopra Steria
The company profile of Sopra Steria on Consultancy.uk is currently not activated....
BJSS
BJSS has been acquired by CGI in January 2025....
Sia
The Company profile of Sia Partners on Consultancy.uk is currently not activated....
Mason Advisory
Mason Advisory does not have an active company profile on Consultancy.uk....
Net Consulting
Net Consulting does not have an active company profile on Consultancy.uk....

Silver level

Bronze level

View all 2023 rankings

About the Top consulting firms ranking

Our ranking sets out to answer one basic question: what are the top consulting firms in the UK?

The consulting industry of the UK is home to hundreds of consulting firms – large, mid-sized, boutique and niche consultancies – serving clients across all industries and segments, and specialised in every conceivable area of expertise. Our guide of top consulting firms showcases the industry’s leading players based on the region’s most extensive database of industry insights.

The ranking consists of top consulting firm lists across 30+ areas of expertise (strategy, management, finance, supply chain, sustainability, etc) and 30+ sectors (financial services, public sector, energy, consumer goods, industry, etc), as well as a number of topic-oriented rankings.