Microsoft Cuts Its Neocloud Roster as AI Buildout Shows Strain

Microsoft is planning to work with fewer neocloud providers as it prioritizes its own data centers, according to people familiar with the matter — a shift that piles pressure on a corner of the AI market already showing signs of strain.

The company hasn't decided which partners it will drop, two sources said, asking not to be named because the talks are confidential. One of the people said Microsoft wants to prioritize its own data center footprint. Bloomberg reported the plans earlier. Two people also said Microsoft opted not to renew a deal with Oracle, which has been pouring money into building out AI infrastructure.

The stakes here are straightforward. Microsoft helped bankroll an entire generation of GPU-focused cloud startups after ChatGPT launched in 2022. If it pulls back, the smaller players that bet their businesses on Microsoft contracts have to find other customers, or other financing, fast.

Who is on Microsoft's list?

Over the past few years, Microsoft has built relationships with a string of neoclouds:

• CoreWeave
• Nebius
• Chronoscale
• IREN
• Lambda
• Nscale

It also signed with Oracle, which is spending heavily on AI infrastructure of its own. That Oracle deal is one Microsoft chose not to renew, according to two of the sources.

A Microsoft spokesperson said in an emailed statement that its infrastructure strategy is "built on flexibility and choice."

"We combine Microsoft-owned datacenters, leased facilities and strategic partnerships with third-party providers to deliver the capacity our customers need, where and when they need it," the spokesperson said. "We regularly review these investments against customer demand. That includes tracking delivery and adjusting plans as circumstances change."

In short: Microsoft is saying this is routine portfolio management, not a retreat.

Why does the market look shaky?

Neocloud stocks have been a turbulent trade on Wall Street in recent weeks. Rising interest rates have intensified fears that many of these companies became overly reliant on debt while rushing to build capacity. Shares of CoreWeave, Nebius and IREN are all down by roughly half over the past month, even after rallying on Friday.

A recent industry review counted 323 neoclouds, and experts have predicted that many of them won't survive. That number alone explains why Microsoft's trimming exercise matters beyond Redmond — there are more sellers of GPU capacity than the market can plausibly support if the biggest buyer gets picky.

What did IREN's earnings reveal?

IREN offered a case study in the disconnect between investor fear and customer demand. In its earnings report on Thursday, the company said it handed over data center capacity to Microsoft in August — but Microsoft requested a networking equipment upgrade, pushing the infrastructure's online date to January or February instead of this year.

That delay is a small preview of a bigger pattern at Microsoft. Chief financial officer Amy Hood said on the company's fiscal first-quarter earnings call in October that some cloud contracts involving graphics processing units were delayed until the first half of 2027, affecting Azure cloud growth. Microsoft reported $45.2 billion in capital expenditures and finance leases during the latest quarter, and said capex spending will accelerate in the second half of the fiscal year.

So Microsoft is still spending heavily. It's just getting choosier about where the money goes.

What did IREN's co-CEO say?

IREN shares popped 16% on Friday after the company said AI revenue more than doubled from the prior quarter to $200 million. Co-CEO Daniel Roberts told CNBC there's a "disconnect between what we're seeing in public market and what we're seeing at the customer level."

But he didn't pretend the market environment is easy.

"Capital markets have become more selective in the last few weeks, and the questions have undoubtedly moved from how big the contract is to whether it can be delivered, financed, and run at a profit," Roberts said on the earnings call.

That quote captures the sector's problem in one line: investors no longer reward announced deals. They want proof the deals can be financed and executed.

CoreWeave and Nebius are both scheduled to report quarterly results next week. Those reports will land with unusual weight, given the sell-off and the uncertainty around Microsoft's intentions.

What has happened with Nscale?

Microsoft has already slashed its work with U.K.-based neocloud Nscale. It walked away from a site it had intended to use in England. Darren Hardman, Microsoft's CEO for the U.K. and Ireland, told CNBC in October that the decision came down to Nscale's ability to get access to electricity.

The Financial Times reported this week that Microsoft also decided against renewing a contract with Nscale in Texas. Nscale filed to go public in mid-September but hasn't updated its prospectus since. In its IPO filing, the company said it expects Microsoft to be a "significant customer in future periods."

That's an awkward sentence to have in a prospectus when your anchor customer is visibly cutting ties.

How did we get here?

Microsoft's big turn to neoclouds started after ChatGPT's launch in 2022 triggered a surge in demand for GPUs. Azure's own capacity couldn't keep up, so Microsoft signed up CoreWeave — at the time a privately held startup with roots in cryptocurrency mining.

The dependency ran deep. When CoreWeave went public last year, it disclosed that 62% of its 2024 revenue came from Microsoft.

The demand side has also spread out. At the time of ChatGPT's release, OpenAI used only Azure. Its cloud suppliers now include Amazon, Cerebras, CoreWeave, Google and Oracle.

Is this a retreat or a rebalancing?

Microsoft's spokesperson pushed back on the idea that anything dramatic is happening. Reviewing neocloud investments is "a normal and responsible way to manage large, complex infrastructure projects," the spokesperson said, adding that "the pace of our new agreements reflects what we need today."

That framing has some support in the numbers. Microsoft's $45.2 billion quarterly capex and its plan to accelerate spending in the second half of the fiscal year don't describe a company exiting the AI buildout. They describe a company shifting mix — more of its own footprint, fewer outside leases, contracts that match demand as it actually materializes rather than as it was forecast.

For the neoclouds, the read is less comfortable. A single customer consolidation can wipe out the majority of a supplier's revenue, as CoreWeave's 62% figure shows. With 323 providers in the field, experts predicting attrition, and capital markets asking harder questions about delivery and profit, the next few quarters will sort the sector into companies that can stand on their own economics — and those that can't.

CNBC's Kif Leswing contributed to this report.