Calliope clients worldwide

Since the creation of Calliope in 2000, our members have worked with hundreds of the world’s most prestigious organizations, including the United Nations, the European Union, the International Olympic Committee, the International Monetary Fund, the World Bank and a great number of Fortune 500 companies. Many of them rely on us year in, year out.

Our clients

Calliope works with a broad spectrum of clients, including multinational corporations, governments, international organizations, industry and professional associations, professional conference organizers, as well as for mega-events like the Olympics.
Client testimonials

Client testimonials

Many of our clients rely on us, year in, year out – and they’re happy to vouch for the quality of our services.
Major Projects

Major Projects

Calliope has ensured the success of several very high-profile events over the years: the Youth Olympic Games, a number of EU Presidencies, the International Forum of Cultures, and more.