Space data centers cost 3x more than ground, Barclays says

SpaceX's $2 trillion IPO has turned orbital data centers into a Wall Street talking point, but Barclays estimates they cost more than three times as much as terrestrial facilities and won't threaten traditional operators for at least a decade.

Barclays poured cold water on the space data center narrative Friday, estimating orbital facilities cost $50 million per megawatt — more than three times the $15 million for ground-based sites — and pose no threat to traditional operators for at least 10 years.

"Space-based data centers are not a near-term competitive threat to traditional data center operators," Brendan Lynch, an analyst at Barclays, wrote in a report titled "Ashburn, Then Abilene, Then Space." "The economics simply don't work yet."

The five-year lifecycle cost for a space data center runs about $51 billion per gigawatt, compared with $16 billion on the ground, Lynch estimated. Launch costs remain the biggest hurdle: SpaceX's Falcon Heavy still costs about $1,500 per kilogram, far above the $200 per kilogram threshold Google estimates is needed for orbital computing to become economically viable. Starship, SpaceX's next-generation rocket, isn't expected to reach full commercial scale until 2027 or 2028.

The analysis comes as SpaceX's Nasdaq debut Friday pushed its valuation past $2 trillion, making it the sixth-largest US company, and as hyperscale cloud providers plan to spend $800 billion on data center capacity this year. Ground-side constraints — only 5 gigawatts of 16 gigawatts of planned US capacity is actually under construction — are fueling interest in orbital alternatives, but Lynch said space-based facilities would complement rather than replace terrestrial infrastructure.

The Five Barriers to Orbit

Space data centers offer theoretical advantages: near-continuous solar power that can be up to eight times more efficient than ground-based panels, no land-use approvals, and immunity from natural disasters and grid failures. But those benefits come with five structural disadvantages, Lynch said.

Radiation-hardened chips, required to survive the space environment, perform more than 100 times worse than terrestrial data center chips and cost significantly more. Nvidia and other semiconductor companies are exploring dedicated space computing hardware, but large-scale commercial availability remains distant.

Thermal management is another obstacle. Without air in space, traditional fan-based cooling is impossible. Satellites must use liquid cooling to draw heat from chips and radiate it into deep space — a far less efficient process that limits computing density per satellite.

Orbital data centers have an expected lifespan of about five years, since in-orbit equipment cannot be repaired or upgraded. Ground facilities can operate for decades with continuous maintenance.

Bandwidth constraints and regulatory hurdles compound the problem. Inter-satellite optical laser links require precise alignment, while radio communication with the ground faces strict spectrum regulation from the International Telecommunication Union. Operators need authorization in every jurisdiction where signals are received.

Who's Building in Space

Despite the cost gap, a race is underway. SpaceX has filed plans with the FCC for as many as 1 million data center satellites targeting about 100 gigawatts of computing capacity. The company operates roughly 10,000 Starlink satellites and controls about 65% of active satellites in orbit.

Jeff Bezos' Blue Origin has proposed Project Sunrise, a constellation of up to 51,600 satellites for AI workloads, though NASA has objected over orbital path conflicts with crewed missions. Startup Starcloud deployed a single-GPU proof-of-concept satellite in November 2025 and plans a 10-kilowatt satellite in 2027, targeting 88,000 satellites by 2035.

Planet Labs, the publicly traded Earth-imaging company, is working with Google on Project Suncatcher, aiming to test Google's TPU chips in orbit by early 2027. Axiom Space has been testing cloud computing on the International Space Station since 2022 and launched its first two orbital data center nodes in January.

Investment Implications

For traditional data center operators like Equinix and Digital Realty, Barclays' analysis is supportive: the orbital threat is a decade away at minimum. The $800 billion in hyperscaler capex this year and the supply constraints on the ground — only 5 of 16 gigawatts of planned US capacity is under construction — reinforce structural demand for terrestrial facilities.

SpaceX shares closed at $161 on Friday, up 19% from the IPO price, valuing the company at $2.1 trillion. At 118 times trailing revenue, the stock prices in years of future growth from Starlink, Starship, and the orbital AI computing vision. Lynch's report suggests that vision will take longer — and cost more — than the IPO euphoria implies.

This article is for informational purposes only and does not constitute investment advice.