By Mauro Orru

Nscale Global Holdings said it had secured a $900 million line of credit that would allow the U.K. artificial-intelligence infrastructure startup to expand the buildout of data centers across Europe, the U.S. and the Asia Pacific.

The company relies on a network of data centers in Europe and the U.S. that it operates on its own or through partners, according to its website, but is seeking to expand AI infrastructure in Asia as well. Companies can tap its data centers by reserving graphics processing units, or GPUs--chips that accelerate the millions of computations required in AI training.

The startup said the revolving credit facility would inject flexible liquidity to accelerate its data-center buildout plans. A consortium of banks including J.P. Morgan, Goldman Sachs, Morgan Stanley, MUFG, RBC Capital Markets, Bank of America, Credit Agricole CIB, Deutsche Bank, Mizuho, SMBC, TD Securities and KeyBank syndicated the facility.

"We are building the infrastructure that the world's largest technology companies depend on to train, deploy, and scale AI, and this facility increases our flexibility to do that at speed and at scale," Nscale Chief Executive Josh Payne said.

Backed by Nvidia, Dell Technologies and Nokia, Nscale raised $2 billion earlier this year at a $14.6 billion valuation as investors continue to see promise in AI infrastructure. The closure of the revolving credit facility comes nearly two months after Nscale secured $790 million in financing to build out a data center project in Norway.

The company said in May that it would channel those funds to expand an AI data center just outside Narvik in northern Norway that is expected to include more than 30,000 Nvidia Rubin processing units.

Financing arrangements to support the buildout of AI infrastructure have raised concerns among some investors in recent months that companies might be taking on too much debt and overspending on a technology that hasn't yet yielded the expected benefits, potentially creating a market bubble that is waiting to burst.

Payne said the revolving credit facility showed that global investment banks had confidence in Nscale and its capital structure and plans to build out data centers.

Write to Mauro Orru at mauro.orru@wsj.com