The company describes itself as the fourth-largest actor in public transport. In 2019, the Group's consolidated revenue was €5.704 billion it employs 64,000 people. RATP Dev, the Group's international operations and maintenance subsidiary, is present in 13 countries in Africa, Asia, Europe and North America.

While RATP's Paris-related activities are still a major part of its business, its operations have extended since 2002 to include business around the globe in various modes of urban and regional transportation. In the Île-de-France region, the RATP carries about 3.3 billion passengers per year.

Today, the RATP is still responsible for most of the public transport in the Greater Paris area, including the Paris Métro, Île-de-France tram, and RATP bus network, as well as part of the regional express rail (RER) network. Its logo represents, in a stylised version, the Seine's meandering through the Paris area as the face of a person looking up.

Formed in 1949, it has its origins as the city's public transport operator. The RATP Group ( French: Groupe RATP), also known as the RATP or Régie Autonome des Transports Parisiens (English: Autonomous Parisian Transportation Administration), is a state-owned public transport operator and maintainer headquartered in Paris, France.

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