KPMG
McKinsey & Company (including subsidiaries Quantum Black)
Deloitte (including Monitor Deloitte and Deloitte Digital)
Accenture (including ?What If! and Javelin group)
PwC (including Strategy&)
Boston Consulting Group (including BCG Digital Ventures)
Bain & Company EY (including EY-Parthenon and EY-Seren)
IBM Business Services
Atkins
Capgemini
Invent
Baringa
Grant Thornton
PA Consulting
Kearney
Deloitte Digital
Vendigital
BearingPoint
Oliver Wyman
Curzon Consulting
Gartner
Charles River Associates
BAE Systems
Applied Intelligence
Korn Ferry
AlixPartners
Clarasys
L.E.K. Consulting
Mott MacDonald
Atos
BDO
Cognizant
Infosys
Project One
The Berkeley Partnership
Infinity Works
Moorhouse
Publicis
Sapient
Arup
Tata Consultancy Services
Arcadis
BJSS
OC&C Strategy Consultants
Alvarez & Marsal
EY-Parthenon
GameShift
31ten
Acrotrend
The PSC
Arthur D. Little
Basis
CGI
Dell
EMC
ProConsult Advisory Services
dmw
Gobeyond
Manifesto
Growth Architects
Mason Advisory
North Highland
Prophet
3Keel
11:FS
Capita
Dectech
Gallup
Pearson
Ham Ricardo
Simon Kucher & Partners
Wood Mackenzie
4C Associates
Altran
Avanade
BCS Consulting
BIS Consulting
BMC Brand
Vista
Cambridge Consultants
Cambridge
Econometrics
Capco
Clear
DXC Technology
Egremont Group
FTI Consulting
Human Engine
Mercer
Monitor
Deloitte
Oliver & Ohlbaum Associates
Oaklin
Peopletoo
PPL
Proudfoot
Q5
RedQuadrant
Savills Strategy& Sysdoc
Unipart Voyager Solutions
White Space Strategy
WSP
Apex Healthcare Consulting