LONDON — Britain’s competition regulator on Thursday said that Microsoft and Amazon are hurting competition in the cloud computing industry and called for a probe into their market dominance under the country’s strict new tech rules.

The Competition and Markets Authority said that market concentration and barriers to entry in the cloud services market have enabled both Microsoft and Amazon to hold “significant unilateral market power” and reap financial gain exceeding the cost of capital expenditure over a sustained period.

Tech giants like Amazon, Microsoft and Google have built huge businesses by offering access to computing resources — such as data storage and processing — via the internet using data centers, large facilities that contain dedicated hardware.

The CMA is concerned that certain practices within the space, such as egress fees and unfavorable licensing terms, are creating a “lock-in” effect where businesses are getting trapped into contractual agreements that are difficult to get out of.

Microsoft said the regulator’s decision “misses the mark again, ignoring that the cloud market has never been so dynamic and competitive, with record investment, and rapid, AI-driven changes.”

“Its recommendations fail to cover Google, one of the fastest-growing cloud market participants,” a Microsoft spokesperson told CNBC via email.

Amazon also disputed the CMA’s findings and said recommendations for a fresh probe into the two tech giants’ dominance of cloud were “unwarranted.”

“It risks making the UK a global outlier at a time when businesses need regulatory predictability for the UK to maintain international competitiveness,” an Amazon spokesperson told CNBC.

Google praised the CMA’s move, calling it a “watershed moment” for the U.K. Swift action will be “essential to ensure British businesses pay a fair price and to unleash choice, innovation and economic growth in teh U.K.,” Chris Lindsay, Google’s vice president of customer engineering for EMEA, said in a statement.

Meta CEO Mark Zuckerberg plans to continue his company’s artificial intelligence spending blitz well into the next year as rival tech giants do the same.

Zuckerberg told analysts Wednesday during a second-quarter earnings call that AI’s rapid pace of progress has informed much of Meta’s recent business decisions, including the company’s $14.3 billion June investment into the data-annotating startup Scale AI as part of a revamped AI strategy involving a wave of high-profile hires.

AI’s swift advancement warrants that Meta have “the absolute best and most elite talent-dense team” that can access the resources they need from a “leading compute fleet,” Zuckerberg said about the AI Superintelligence team he assembled for his company this summer. Whatever these top-tier AI researchers build can then be implemented throughout Facebook, Instagram and the rest of the company’s family of apps, he said.

“When we take a technology, we’re good at driving that through all of our apps and our ad systems,” Zuckerberg said. “There’s no other company that is as good as us at kind of taking something and getting it in front of billions of people.”

Those AI endeavors, however, come at a cost.

Meta on Wednesday said it expects its total expenses for 2025 to come in the range of $114 billion and $118 billion, raising the low end of its previous outlook of between $113 billion and $118 billion. And while Meta is still planning out next year, the company said its AI initiatives will “result in a 2026 year-over-year expense growth rate that is above the 2025 expense growth.”

Other tech giants are also spending heavy on AI projects and talent.

Alphabet said last week during its earnings report that it is raising its 2025 capital expenditures forecast to $85 billion, which is $10 billion higher from its prior forecast. Microsoft said Wednesday that its fiscal first-quarter capital expenditures will be $30 billion, ahead of analyst expectations of $24.23 billion.

For now, investors are OK with Meta’s big AI investments, with the company’s shares up nearly 12% in after-hour trading on Wednesday. It helps that Meta reported strong second-quarter earnings that beat on the top and bottom while providing third-quarter sales guidance that topped Wall Street expectations.

It also helps that Zuckerberg said AI drove “greater efficiency and gains across our ad system,” likely reassuring worried investors that Meta’s big AI spending is leading to some immediate results.

And while the company’s Reality Labs unit continues bleeding money, posting an operating loss of $4.53 billion in the second quarter, the surprise hit of the Ray-Ban Meta smart glasses seems to have quelled investor discontent for the time being.

“I continue to think that glasses are basically going to be the ideal form factor for AI, because you can let an AI see what you see throughout the day, hear what you hear, talk to you,” Zuckerberg said. “Once you get a display in there, whether it’s the kind of wide holographic field of view, like we showed with Orion, or just a smaller display that might be good for displaying some information, that’s going to unlock a lot of value, where you can just interact with an AI system throughout the day.”

WATCH: I like Meta as a stock, don’t love it, prefer Google.

Elon Musk’s tunneling venture, The Boring Company, announced plans earlier this week to build a 10-mile underground loop in Nashville, in coordination with Tennessee Republican Governor Bill Lee, who put out a press release praising the project.

Democratic lawmakers in Nashville are demanding answers on the plans, while the state’s Republican leaders have jumped at the chance to partner with Musk. A state commission is holding an emergency meeting and public hearing Thursday morning to discuss a “no cost/mutual benefit” lease arrangement that’s been proposed to help the company get the tunnels started.

“We are aware of the state’s conversations with the Boring Company, and we have a number of operational questions to understand the potential impacts on Metro and Nashvillians,” Freddie O’Connell, Nashville’s mayor, said in an e-mailed statement.

Based in Pflugerville, Texas, The Boring Co. is poised to take over a chunk of public property about the size of a football field in downtown Nashville. The commission that’s meeting on Thursday includes Tennessee’s governor, speaker of the house, speaker of the senate and secretary of state. Members of the public were invited to give testimony but with less than a week’s notice.

On Monday, The Boring Co. and state officials divulged that Musk’s venture would dig its tunnels under state-owned roadways in order to “connect downtown and the Convention Center to Nashville International Airport with a transit time of approximately 8 minutes.”

It’s called the Music City Loop, and the project marks Musk’s latest effort to bolster his budding business empire in Tennessee. His artificial intelligence startup xAI, the parent of social media platform X, is building data centers and a power plant in Memphis, on the western side of the state.

The governor’s office said on Monday that the Nashville project would come “at zero cost to taxpayers” and would be “entirely privately funded,” though no details were provided about whether or what type of cost-benefit analysis, environment, safety or traffic assessment had been completed by the state before agreeing to the deal.

Musk became a major force in Republican politics last year, when he spent almost $300 million to help reelect President Donald Trump before working for the Trump administration in the first few months of this year. Musk brought The Boring Co. CEO Steve Davis with him to lead Trump’s DOGE initiative, slashing federal agencies, regulations and personnel.  

Justin Jones, a Democratic state representative in Nashville, told CNBC on Wednesday that his district had not been able to participate in any public comment period, and hadn’t seen any environmental impact report or health assessment related to the Music City Loop or its construction.

The Boring Co. has previously built tunnels in Las Vegas, including an initial two miles to carry visitors to different exhibit halls around the Las Vegas Convention Center. Tesla drivers travel through the tunnels to pick up and drop off passengers, who book their rides using an app.

The initial loop cost Nevada taxpayers about $50 million and has been criticized for a lack of pedestrian entrances, walkways and platforms, and its limitations relative to a subway system. The Boring Co. was previously fined by the Nevada Occupational Safety and Health Administration for repeated violations and worker injuries in Las Vegas.

The Musk-owned company also abandoned plans to build tunnels in other locations, including Chicago.

One particular concern in Nashville is that the city is prone to flooding with an average annual rainfall of around 50 inches, according to the National Weather Service, which compares to around 4 inches in Las Vegas. The city’s Metro Water Services previously arranged, with federal support, to purchase homes from residents in vulnerable areas at reduced prices, and convert the land there to green spaces.

The Boring Co. has no experience building in areas with that kind of rainfall and flooding concern.

The public hearing to discuss whether the state will give the parking lots to The Boring Co. in a no-cost, mutual benefit lease agreement starts at 8 a.m. local time on Thursday at Cordell Hull State Office Building, according to a copy of the agenda on the state government’s website.

In Memphis, xAI has faced a community backlash over its use of natural gas-burning turbines which power its data center and supercomputer there. The facility, housed in a former home appliance factory, is responsible for training xAI’s controversial chatbot Grok.

The NAACP and other environmental and public health advocates are suing xAI, saying the company exacerbated air pollution in the area, harmed majority-Black communities who live near their facilities, and violated the Clean Air Act. An xAI spokesperson said at the time the groups announced their intent to sue that the company takes “our commitment to the community and environment seriously.”

WATCH: Tesla CEO Elon Musk says he has no plans to merge the automaker with xAI