Rapid KL is a public transportation system owned by Prasarana Malaysia and operated by its subsidiaries Rapid Rail and Rapid Bus. The acronym stands for Rangkaian Pengangkutan Integrasi Deras Kuala Lumpur, which translates to Kuala Lumpur Rapid Integrated Transport Network in the Malay language. Rapid KL, with its 204.1 km (126.8 mi) of metro railway and 5.6 km (3.5 mi) of BRT carriageway, is part of the Klang Valley Integrated Transit System, operating throughout Kuala Lumpur and Selangor's satellite cities in the Klang Valley area.

Prasarana Malaysia Berhad (Prasarana) (English: Malaysian Infrastructure Limited) is a 100% government-owned company which was set up by Ministry of Finance (Malaysia) as a corporate body established under the Minister of Finance (Incorporation) Act 1957 to own the assets of multi-modal public transport operator in Malaysia, under the government's move to restructure the city's public transport system. It is one of the largest public-transport companies in Malaysia other than Konsortium Transnasional Berhad. As a government-owned company since 1998, it operates stage bus and light metro services via several wholly owned subsidiaries.