3 Quantum Computing Stocks With More Upside Than SpaceX

Space Exploration Technologies (SPCX 16.22%) may be the most exciting stock on the market right now, but I think there are plenty of better investment opportunities outside of SpaceX. One of those areas is quantum computing, a field that's starting to gain serious momentum and could reach viability status by 2030. If that's the case, investors need to position themselves to take advantage of a massive, growing trend that could pay off big time. I've got three quantum stocks that look like excellent buys now, and investors should consider buying them instead of SpaceX, as the upside is greater. Image source: Getty Images. IonQ IonQ (IONQ +3.10%) is one of the top quantum computing pure plays available, and has reached that level due to its unique approach. Instead of using a superconducting quantum computing technique, it uses trapped ions, which yield superior accuracy. In fact, IonQ holds the world record for two-qubit gate fidelity -- the most commonly used measurement for accuracy in the quantum computing industry. ExpandNYSE: IONQIonQToday's Change(3.10%) $1.75Current Price$58.30Key Data PointsMarket Cap$21BDay's Range$55.55 - $61.9852wk Range$25.89 - $84.64Volume1MAvg Vol30.5MGross Margin-2879.52% This has led to strong demand for its products, and several researchers and early adopters are starting to purchase some early-stage systems so they are ready when more commercially viable systems are available. IonQ's revenue is booming as a result, with it rising 755% in Q1 to $65 million. With industry-leading accuracy and a large, 256-qubit system available, IonQ looks poised to be a frontrunner in the quantum computing arms race. D-Wave Quantum D-Wave Quantum (QBTS 0.89%) is also taking a different approach than most quantum companies. Its initial quantum offering is an annealing quantum computer, which helps solve optimization problems. This product is already being utilized in some industries to create schedules and optimize supply chains. However, applications are far more limited compared to a general-purpose quantum computer, and D-Wave is also developing one of those. ExpandNYSE: QBTSD-Wave QuantumToday's Change(-0.89%) $-0.22Current Price$24.47Key Data PointsMarket Cap$9.1BDay's Range$23.53 - $25.6352wk Range$12.75 - $46.75Volume1.3MAvg Vol33.8MGross Margin32.92% This two-faced approach makes D-Wave a bit less risky of a bet compared to some competitors in the industry, but it still has a long way to go before becoming a viable business. However, it did show signs of strength thanks to two orders for its quantum computers. Combined, those deals are worth about $20 million, which represents significant growth for D-Wave. D-Wave may be a bit more of a long shot than IonQ, but if it works out, the upside is immense. Nvidia Last is Nvidia (NVDA 1.13%), which may seem like an odd inclusion on a quantum computing stock list, since it has explicitly stated that it has no plans to build a quantum processing unit. However, that doesn't mean it's ignoring the field. Nvidia sees a future where quantum computing and traditional computing methods are used side by side. Nvidia already has a grip on the traditional computing market, so it modified its NVLink (its networking hardware) to the NVQLink, with the "Q" indicating that quantum computing can easily connect to existing networks. ExpandNASDAQ: NVDANvidiaToday's Change(-1.13%) $-2.38Current Price$208.31Key Data PointsMarket Cap$5.1TDay's Range$207.72 - $213.9952wk Range$142.03 - $236.54Volume4.2MAvg Vol164.2MGross Margin74.15%Dividend Yield0.13% It also launched an AI model that's used for quantized error correction and adopted its CUDA software to include quantum functions, renaming it CUDA-Q. All of this shows that Nvidia isn't ignoring quantum computing; it's just creating an environment where quantum companies must work with Nvidia once their products have reached commercial scale. With massive demand for traditional computing power already at record levels, Nvidia will be able to continue its dominance as the world's largest company for the foreseeable future. Additionally, if it finds a quantum company with huge potential, it may buy them out at a premium to gain access to the technology. We'll see what the future holds for Nvidia, but even if quantum computing takes over, Nvidia will still be a major part of the computing landscape. Read NextJun 19, 2026 •By Marc Guberti3 Tech Stocks to Buy Before Q-DayJun 19, 2026 •By Keithen DruryBetter Quantum Computing Stock to Buy: IonQ vs. RigettiJun 18, 2026 •By Robert IzquierdoXanadu Quantum vs. IonQ: The Better Quantum Computing Stock Buy for 2026Jun 17, 2026 •By Justin PopeBuy, Sell, or Hold: Where 5 of Wall Street's Hottest Stocks Stand Right NowJun 16, 2026 •By Micah ZimmermanQuantinuum's IPO Is Putting Pressure on IonQ, Rigetti Computing, and D-Wave Quantum. Here's Which Quantum Computing Stock Survives the Reset.Jun 15, 2026 •By Rich SmithWhy IonQ Computing Stock Just PoppedAbout the AuthorKeithen Drury is a contributing Motley Fool technology analyst covering AI, semiconductors, cybersecurity, and SaaS stocks. In addition to The Motley Fool, Keithen is a mechanical engineer and has held roles at Honeywell and smaller industrial companies like Brand Hydraulics and Lincoln Industries. He holds a bachelor’s degree in mechanical engineering from Dordt University.TMFTripleOptionStocks MentionedIonQNYSE: IONQ$58.30(+3.10%)+$1.75Motley Fool Stock Advisor’s Latest PickGet Access---% Avg ReturnNvidiaNASDAQ: NVDA$208.31(-1.13%)-$2.38D-Wave QuantumNYSE: QBTS$24.47(-0.89%)-$0.22Space Exploration TechnologiesNASDAQ: SPCX$155.00(-16.22%)-$30.00*Average returns of all recommendations since inception. Cost basis and return based on previous market day close.