Pure-Play AI Cloud vs. Energy-Driven Infrastructure: Nebius Scale Meets IREN Limited’s Efficiency

Alex Sirois

Wed, September 9, 2026 at 5:41 PM GMT+3 4 min read

Quick Read

Nebius posted 454% revenue growth and a 50% EBITDA margin while IREN's $684M net loss masked AI Cloud revenue doubling sequentially.
Nebius anchors on a $27B Meta agreement while IREN's $3.4B NVIDIA contract backs its $4B contracted ARR target by December 2026.
Nebius wins on software margins and $8B cash, while IREN's owned power assets offer rare upside if Horizons 2 through 4 ship on schedule.
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Nebius Group (NASDAQ: NBIS) and IREN (NASDAQ: IREN) both just delivered results that reveal how differently two AI infrastructure builders can attack the same shortage. Nebius reported Q2 FY26 on August 12, showcasing a from-scratch cloud platform. IREN followed on August 27 with a Bitcoin miner turning its power footprint into GPU factories. Same tailwind, wildly different playbooks.

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Software Stack Lifts Nebius. Power Portfolio Lifts IREN.

Nebius booked $582.3 million in Q2 revenue, up 454% year over year, with the AI Cloud unit alone hitting $574.9 million and a 50% adjusted EBITDA margin. CEO Arkady Volozh told investors "We could sell today our entire 2027 capacity on these terms if we wanted to", a rare position for a cloud operator. Aether, Token Factory, and the Tavily acquisition, whose developer community grew to more than 2.5 million, extend Nebius beyond bare metal.

IREN posted $137.2 million in revenue, down 26.75%, as mining rigs came offline. A $450.4 million non-cash impairment drove a $684.0 million net loss. The pivot story is inside the mix: AI Cloud revenue reached $70.5 million and more than doubled sequentially. CEO Daniel Roberts framed the edge plainly: "Signing deals is not the bottleneck in this market. Bringing GPUs online is."

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Scale Versus Efficiency, Side by Side

Lens

Nebius

IREN

Core Bet

Full-stack AI cloud plus software

Owned power, land, and data centers

Contracted Backlog

$37.5B RPO

$4B contracted ARR target by Dec 2026

Power Pipeline

5GW year-end target

5GW+ pipeline

Anchor Deal

$27B Meta Platforms (NASDAQ:META) agreement

$3.4B NVIDIA (NASDAQ:NVDA) contract

Nebius is optimizing for pricing power. Its first capacity auction cleared at a price 15% above its prior high for Blackwell. IREN is optimizing for cost per megawatt. Recent three-year deals price above $20 million per MW, with active talks near $25 million, and Roberts noted "Every megawatt we build is scarce."

What Decides the Next Four Quarters

I will be watching whether Nebius can convert its $40 billion-plus in customer commitments into asset-backed financing without leaning on equity again after selling 12.7 million shares at $224. You should watch whether IREN delivers Horizons 2 through 4 to Microsoft (NASDAQ:MSFT) on schedule, since a significant portion of December-quarter capacity comes online late. Both stories hinge on execution.

Why I Lean Nebius for Now, But Keep IREN Close

Personally, I lean toward Nebius today. A 50% AI Cloud EBITDA margin, a software layer that lifts monetization, and $8 billion in cash make the scale-out feel financeable. The stock is not cheap after a 156.88% six-month run, so valuation discipline matters. IREN suits a turnaround investor comfortable with impairments and construction risk in exchange for the rarest input in the industry: energized land. If Horizons 2 through 4 ship on time and pricing holds near $25 million per MW, IREN's 20.83% six-month gain looks like the setup with room to run. Both names carry timing risk if GPU supply slips.

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