Consulting service demand has increased over the last two decades. Since the way we work is changing notably (contracting and freelancing are more common than ever before) and companies are very conscious about their staff and want the very best, many corporations eventually outsource some of their work to external consulting firms.

Consulting firm

consulting firm is a company formed by expert consultants who offer professional feedback, analysis or insights to an organization. They mainly consist of industry-specific specialist and experts.

The deliverable of a consultant is usually advice or a recipe to follow to achieve a company objective, leading to a company project. Many world-known consulting companies are mainly accountancy firms such is the case of Ernst & Young.

However below we have listed all the top consulting firms in the world regardless of their specialism and most of them are management consulting firms.

Consulting firms in London

Below I have listed the top consulting firms in London. The list has been curated by myself and is completely uncommissioned.

Although there is no much mystery about the top consulting firms as you will most likely find some names that will repeat over and over again. These consulting firms are known as the big five:

  1. Accenture (formerly Andersen Consulting)
  2. Deloitte Touche Consulting (Deloitte Consulting)
  3. Ernst & Young
  4. KPMG Consulting
  5. PriceWaterhouseCoopers
ACCENTURE (FORMERLY ANDERSEN CONSULTING)

Accenture is one of the largest consulting firms in the world with over 400,000 employees and offices all over the world. It offers multinational professional services to companies within several fields such as strategy, digital, technology, operations and consulting.

It is domiciled in Ireland since 2009 and over the last two decades, it has doubled its revenue and the number of employees. Accenture is probably heading towards its way to lead the consulting services industry.

Accenture services cover most major industries: retail, banking, aerospace, automotive, energy, health and chemicals among others.

Key Info

  1. CEO: JULIE SWEET (1 SEP 2019–)
  2. HEADQUARTERS: DUBLIN, IRELAND
  3. CUSTOMER SERVICE: 0808 101 1169
  4. SUBSIDIARIES: AVANADE, IMJ CORPORATION, DROGA5, MORE

Specialisms

  1. STRATEGY: BUSINESS, TECHNOLOGY AND OPERATIONS STRATEGY SERVICES
  2. CONSULTING: TECHNOLOGY, BUSINESS AND MANAGEMENT CONSULTING
  3. DIGITAL: DIGITAL MARKETING, ANALYTICS AND MOBILITY SERVICES
  4. TECHNOLOGY: TECHNOLOGY SOFTWARE, IMPLEMENTATION, DELIVERY, AND RESEARCH & DEVELOPM
  5. TECHNOLOGY: TECHNOLOGY SOFTWARE, IMPLEMENTATION, DELIVERY, AND RESEARCH & DEVELOPM
DELOITTE

Deloitte with over 100 years of history was founded in London in 1845 by William Deloitte since then the consulting firm has grown enormously and currently it counts with over 300,000 specialists in their payroll and office all over the world.

Deloitte is the largest professional services provider in the United Kingdom with over 20,000 partners and staff.

Among its most relevant client, we can find FTSE 100 companies and many governmental organizations.

Its advisory services include audit, accountancy, tax, corporate finance and consulting. Deloitte has a long story and serves some of the most important companies in the world as well as consult governments and non-profit organizations.

If you are running a small business, you might be thinking of hiring small boutique consulting firms but your company is growing fast and led by ambition, I am very confident Deloitte will outlive all your expectations.

Key Info

  1. CEO: PUNIT RENJEN (1 JUN 2015–)
  2. REVENUE: 46.2 BILLION USD (2019)
  3. NUMBER OF EMPLOYEES: 312,000 (2019)
  4. FOUNDER: WILLIAM WELCH DELOITTE
  5. HEADQUARTERS LOCATIONS: NEW YORK, NEW YORK, UNITED STATES, UNITED STATES
  6. SUBSIDIARIES: MONITOR DELOITTE, DCSH LIMITED, MORE

Specialisms

  1. AUDIT
  2. CONSULTING
  3. FINANCIAL ADVISORY
  4. RISK ADVISORY
  5. TAX AND LEGAL
  6. GOVLAB
ERNST & YOUNG

Ernst & Young also known as EY is a global leader in assurance, tax, transaction and advisory services. EY is a major organization and within the EY label, there are included several other branches or firms: Ernst & Young Global Limited, each of which is a separate legal entity.

Ernst & Young Global Limited. In their own words, the insights and quality services we deliver help build trust and confidence in the capital markets and in economies the world over.

We develop outstanding leaders who team to deliver on our promises to all of our stakeholders. In so doing, we play a critical role in building a better working world for our people, for our clients and for our communities.

Key Info

  1. HEADQUARTERS: LONDON
  2. CEO: CARMINE DI SIBIO (1 JUL 2019–)
  3. REVENUE: 36.4 BILLION USD (2019)
  4. NUMBER OF EMPLOYEES: 270,000 (2019)
  5. CHAIRPERSON: CARMINE DI SIBIO

Specialisms

  1. ADVISORY: RISK, IT RISK AND ASSURANCE, PERFORMANCE IMPROVEMENT, AND ACTUARIAL. TRANSACTION ADVISORY SERVICES OR TAS
  2. ASSURANCE: FINANCIAL AUDIT, FINANCIAL ACCOUNTING ADVISORY SERVICES, AND FORENSIC & INTEGRITY SERVICES.
  3. DIGITAL: DIGITAL MARKETING, ANALYTICS AND MOBILITY SERVICES
  4. TAX: TRANSFER PRICING, INTERNATIONAL TAX SERVICES, BUSINESS TAX COMPLIANCE, PEOPLE ADVISORY, GLOBAL TRADE, INDIRECT TAX, TAX ACCOUNTING & RISK ADVISORY SERVICES, TAX TECHNOLOGY AND TRANSFORMATION, TRANSACTION TAX.
KPMG CONSULTING

KPMG is a global professional consulting firm specialized in audit, tax and advisory services. KPMG is the result of a merger among two larger organizations in 1987, Peat Marwick International and Klynveld Main Goerdeler.

Considered one of the top four accounting firms in the world, it counts with over 207,000 employees and its reach covers 153 countries and territories. KPMG Consulting aims to deliver value to its clients and build long term successes by working with a clear vision and defined values.

Our industry focus helps KPMG firms’ professionals develop a rich understanding of clients’​ businesses and the insight, skills and resources required to address industry-specific issues and opportunities.

Key Info

  1. HEADQUARTERS: LONDON
  2. REVENUE: 42.4 BILLION USD (2019)
  3. NUMBER OF EMPLOYEES: 250,930 (2018)
  4. FOUNDER: SAMUEL LOWELL PRICE
  5. SUBSIDIARIES: PRICEWATERHOUSECOOPERS PRIVATE LIMITED

Specialisms

  1. ASSURANCE
  2. ADVISORY: ACTUARIAL CONSULTANCY AND ACTUARIAL AND INSURANCE MANAGEMENT SOLUTIONS
  3. TAX:: INCLUDING INTERNATIONAL TAX PLANNING AND COMPLIANCE
PRICEWATERHOUSECOOPERS

Headquartered in London and also known as PwC, this consulting firm is a multinational professional services company that currently proudly serves 420 out of 500 Fortune 500 companies.

It works more of as a network of firms It is currently the second-largest consulting firm in the world with 721 offices in 158 countries and over 250,000 professionals.

The company’s global revenues were $41.3 billion in FY 2018, of which $17.06 billion was generated by its Assurance practise, $10.45 billion by its Tax practice and $13.78 billion by its Advisory practice.

If you are looking for a consulting firm that specializes in data analysis, PriceWaterhouseCoopers has been investing largely in their data and research branch.

With large offices all over the world, PwC can afford to invest large resources into data. Such a move could become crucial in the future success of the firm as companies and organizations are being inundated by data and it seems to have a bright future.

Key Info

  1. CEO: JULIE SWEET (1 SEP 2019–)
  2. HEADQUARTERS: DUBLIN, IRELAND
  3. CUSTOMER SERVICE: 0808 101 1169
  4. SUBSIDIARIES: AVANADE, IMJ CORPORATION, DROGA5, MORE

Specialisms

  1. STRATEGY: BUSINESS, TECHNOLOGY AND OPERATIONS STRATEGY SERVICES
  2. CONSULTING: TECHNOLOGY, BUSINESS AND MANAGEMENT CONSULTING
  3. DIGITAL: DIGITAL MARKETING, ANALYTICS AND MOBILITY SERVICES
  4. TECHNOLOGY: TECHNOLOGY SOFTWARE, IMPLEMENTATION, DELIVERY, AND RESEARCH & DEVELOPM
  5. TECHNOLOGY: TECHNOLOGY SOFTWARE, IMPLEMENTATION, DELIVERY, AND RESEARCH & DEVELOPM

Top Consulting firms by revenue

RankFirmConsulting Revenue
1Accenture Consulting$17,310,000,000
2Capgemini Consulting$15,460,000,000
3Tata Consultancy Services$14,930,000,000
4Cognizant Technology Solutions$14,810,000,000
5Deloitte Consulting$13,350,000,000
6PricewaterhouseCoopers Advisory$12,253,000,000
7Cisco Systems Consulting$12,000,000,000
8Ernst & Young Advisory$11,600,000,000
9Infosys Consulting$10,210,000,000
10KPMG Advisory$10,180,000,000
11McKinsey & Company$8,800,000,000
12CGI Group$8,500,000,000
13HP Enterprise Technology Services$7,882,000,000
14The Boston Consulting Group, Inc.$6,300,000,000
15Booz Allen Hamilton$6,100,000,000
16Mercer LLC$4,300,000,000
17IBM Global Services$4,200,000,000
18Bain & Company$3,870,000,000
19SAP Services Consulting$3,566,000,000
20Oracle Consulting$3,358,000,000
21Gartner, Inc.$3,300,000,000
22Altran$2,813,000,000
23Oliver Wyman$2,000,000,000
24Aon Hewitt$1,800,000,000
25FTI Consulting, Inc.$1,800,000,000
26Grant Thornton$1,700,000,000
27BDO Consulting$1,410,000,000
28A.T. Kearney$1,400,000,000
29Sapient Corporation$1,305,000,000
30Strategy&, part of the PwC network$1,300,000,000
31Hitachi Consulting$1,300,000,000
32ICF International$1,190,000,000
33Navigant Consulting, Inc.$1,000,000,000
34AlixPartners, LLP$1,000,000,000
35Slalom Consulting$1,000,000,000
36Protiviti$816,000,000
37Huron$797,700,000
38The Advisory Board Company$781,800,000
39Bearingpoint$767,000,000
40Alvarez & Marsal$600,000,000
41Berkeley Research Group, LLC$600,000,000
42PA Consulting Group$556,000,000
43ZS$525,000,000
44L.E.K. Consulting$500,000,000
45Perficient$487,000,000
46Simon-Kucher & Partners$311,000,000
47Arthur D. Little$239,200,000
48Analysis Group, Inc.$200,000,000
49Horváth & Partners$162,000,000
50West Monroe Partners$160,000,000

Top Consulting firms

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