PT Kereta Commuter Indonesia is a subsidiary of the Indonesian national railway company PT Kereta Api Indonesia (KAI) which manages commuter rail services. Initially founded as an operator of Greater Jakarta commuter rail, the company currently responsible to several commuter rail and local train systems in Indonesia.

PT Kereta Api Indonesia (Persero) (lit. 'Indonesian Railways (State-owned) Limited', abbreviated as PT KAI or simply KAI) is a major railway operator in Indonesia and one of the public railway companies in the country. It is state-owned and pays track access charges. Its headquarters are located in Bandung, West Java. In 2019, KAI carried 429 million passengers and 47.2 million tonnes of cargo.