10 Consulting Firms for International Relations

There is a vast number of consulting firms in the world providing advice for international relations. We have selected ten we think are the most influential.

#1 McKinsey and Co.

McKinsey and Co. is probably the most famous consulting firm in the world, founded way back in 1926. Cooperation with governments, corporations, and various organizations is the responsibility of all consulting companies. They cooperated with the Pentagon but also with the French, German, and many other governments.

#2 Deloitte

Deloitte is one of the leading professional services organizations in the world and provides auditing, business, and financial consulting, as well as tax and risk management services, with the help of 190 national and specialized foreign experts. Deloitte is dedicated to achieving excellence in the provision of professional services.

#3 Boston Consulting Group

Boston Consulting Group (BCG) is a global management consulting firm and the world’s leading business strategy advisor. Founded in 1963, BCG is a private company with 85 offices in 48 countries. They provide services to leading national and international companies in various industries, such as international relations, energy, financial institutions, telecommunications, and transportation.


KPMG is a global network of independent firms that provide professional services in international relations, tax consulting, accounting, legal, financial, and business consulting, as well as consulting related to financial risk management and compliance with regulatory requirements. Their clients are some of the largest international companies, governments of different countries, and agencies from the public sector as well as non-profit organizations who see in KPMG a high standard of services that enables specialization by industry and extensive connection of local, regional, and global markets.

#5 EY

EY is a global, audit-consulting company with a strong focus on creating a better business environment. Their main goal is to unlock new approaches to the toughest business challenges. The impact this company creates with its business is not limited to the clients it works with through our integrated service lines. Through their work, they strive to create a better business environment for all associates by publishing insights, research, and opinions on the most important issues to companies, entrepreneurs, investors, governments, and regulators. In this way, we can help take advantage of all the opportunities that change bring to create better companies and drive more inclusive economic growth.

#6 Berenchot

Berenschot is a leading consulting firm in the Netherlands and Belgium and employs more than 350 consultants covering all levels of the public administration sector and the business community. Berenschot has experience in raising communication standards within government organizations, institutions, and companies. It helps its clients increase their performance by improving the strategic position of the communications department.


PA CONSULTING is one of the most extensive consulting groups, founded in Great Britain in 1943, which operates in 25 countries a. It provides its consulting services to governments, agencies in the public sector, and non-profit organizations through the practice of auditing and assurance. The quality, the large number of clients, and the security it provides put this company at the top of this list.

#8 Alvarez & Marsal

Founded exactly 40 years ago in New York, Alvarez & Marsal is still one of the leading consulting firms in the field of international relations. With over 6,000 employees, the company continues to grow despite the massive competition. They have offices all over the world, including Hong Kong, India, the UK, UAE, Germany, and Brazil.


Started as an alliance of consulting firms from the Baltic countries with headquarters in Estonia, CIVITTA is today a leading management consulting company from Central-Eastern Europe. Their consultants provide services to companies operating in more than 40 countries in Europe, Asia, and North and South America, resulting in more than 10,000 completed projects. By providing high-quality, analytically rigorous consulting services to its clients at an affordable price, CIVITTA redefines the standards of the traditional management consulting industry.

#10 Horváth & Partners

Horváth & Partners is a company founded in 1981 as IFUA Institut für Unternehmensanalysen GmbH and renamed Horváth & Partners in 1989. Horváth&Partners offer their clients consulting services, from the development of a business concept to finding business solutions. Horváth & Partners is an independent international business consulting firm with more than 500 highly qualified employees. They are positioned in six different locations in Germany, as well as in Austria, Hungary, Romania, Switzerland, and the United Arab Emirates. In each of these bases, their advisors take on projects all over the world. Moreover, Horváth & Partners is a proud member of the Cordence Worldwide management consulting alliance. They continuously expand business areas and develop modern solutions, combining professional knowledge with experience gathered from numerous consulting projects to create sustainable benefits for their clients. In the process, they became one of the pioneers of business consulting with international representative offices.

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