Go-Jek is in the middle of a $500 million expansion plan beyond its Indonesian base with a focus on Southeast Asia, and has recently introduced services in Vietnam and Thailand.

It operates a fleet of motorcycle taxis, private cars and other services -- from massage and house cleaning to grocery shopping and food delivery -- available via smartphone, although the Singapore launch will only offer car taxis.

"Today marks the journey for us to be in Singapore so we are super excited, super humbled," Go-Jek president Andre Soelistyo told reporters.

The Singapore market has been dominated by homegrown tech firm Grab since it bought US-based rival Uber's ride hailing and food business in Southeast Asia earlier this year, ending a bruising competition.

In return Uber received a 27.5 percent stake in Grab.

Singapore's anti-monopoly watchdog fined both Grab and Uber for breaking competition rules during the merger.

Soelistyo said Go-Jek's arrival would help to ensure "healthy competition".

Go-Jek's beta app was due to be available for download from Thursday to a limited number of customers, and will only cover a designated part of the city-state.

Beta versions are used to test and gain feedback from a restricted number of users before full service begins.

Go-Jek has partnered with Singapore's biggest bank DBS, hoping to tap into the lender's customer base to drive market share, and offering benefits to its customers in return.

Go-Jek has won financial backing from investors including Google, Singapore's sovereign wealth fund Temasek and Chinese internet giant Tencent.

Southeast Asia's ride-hailing market is expected to reach $20 billion by 2025, according to research by Google and Temasek.

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