BRUN vs NBIS: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. BRUN and NBIS share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined BRUN and NBIS exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Boost Run Inc. (Nasdaq: BRUN) is a NeoCloud provider, meaning it builds and rents specialized cloud infrastructure for artificial-intelligence and high-performance computing rather than general enterprise software. Its platform delivers NVIDIA GPU compute, CPU nodes, managed Kubernetes orchestration, shared storage, and high-speed networking that customers can provision through a console or API. The company earns money by signing multi-year, largely non-cancelable capacity contracts: it reports about $940 million of long-term contracted revenue at an average term of roughly three years, anchored by deals such as a $471.7 million, 36-month agreement tied to 5,000 NVIDIA B300 GPUs and a large multi-year arrangement with Dell Technologies. It operates six US data centers, is building five more, and targets total capacity above 125 megawatts. Trailing-twelve-month revenue was only about $27 million against a net loss, so nearly all of the story is forward-looking backlog and a stated 2026 annualized-revenue target north of $400 million.

Full BRUN guide

Nebius Group is an AI infrastructure company that builds and operates cloud platforms optimized for training and running artificial-intelligence models. It emerged from the international assets of the former Yandex business after Yandex's Russian operations were divested, and it relisted on Nasdaq as a standalone company headquartered in Amsterdam. Nebius's core business is an AI-focused cloud: it builds data centers packed with NVIDIA GPUs and rents that compute capacity to companies training large AI models, competing with the GPU-cloud and neocloud providers that have grown alongside the AI boom. The company designs its own server hardware and software stack to deliver high-performance, cost-efficient AI compute. Beyond the core cloud, Nebius holds several other technology businesses, including an autonomous-driving unit, an edtech platform, and a generative-AI data-labeling business, plus a stake in a data-center and other ventures. As a relatively young public company, Nebius is in a heavy-investment phase, spending aggressively on GPU capacity and data centers to capture AI-infrastructure demand, and is not yet consistently profitable.

Full NBIS guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• BRUN drivers: Riding AI infrastructure demand; Contracted backlog as a visibility lever.
• NBIS drivers: AI compute demand tailwind; Vertically integrated, cost-efficient stack.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: The most immediate risk is liquidity and solvency: auditors issued a going-concern warning before the listing, the company reported a working-capital deficit and an accumulated deficit, and it carries far more debt than equity against only about $27 million of trailing revenue. For NBIS, nebius is an early-stage, capital-intensive business: building GPU data centers requires enormous upfront spending, and the company is not yet consistently profitable, with free cash flow deeply negative during the build-out.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick BRUN if you believe its drivers more; NBIS if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the BRUN and NBIS guides.

BRUN. Figures are approximate and tied to the asOf date; verify live numbers before acting. A roughly $2.1 billion market cap on about $27 million of trailing revenue is well over 70 times sales, so the price reflects the contracted backlog and growth targets rather than current earnings, of which there are none. The gap between tiny reported revenue and a large backlog, alongside the heavy planned capital spending, is the central thing the valuation is asking investors to underwrite.

NBIS. Nebius trades as a speculative, high-growth AI-infrastructure stock valued on future capacity and revenue rather than current earnings. The valuation is highly sensitive to AI-compute demand, GPU access, and execution on data-center build-out. As a young company with negative free cash flow and a complex history, the stock carries large swings tied to AI-infrastructure sentiment and capacity announcements.

Headline figures (approximate, July 2026): BRUN shows share price ~$38.81 (as of late June 2026), market cap ~$2.1 billion on ~64.9 million shares, trailing revenue ~$27 million (last twelve months), long-term contracted revenue ~$940 million backlog, ~3-year average term; NBIS shows revenue (annualized run-rate) ~$1 billion+ and growing rapidly, off a small base, revenue growth Very high, multiple-fold year over year as capacity scales, profitability Not consistently profitable; heavy investment phase, free cash flow Deeply negative during GPU and data-center build-out.

BRUN and NBIS are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined BRUN and NBIS exposure against your real portfolio. It is not an investment adviser.