D-Wave Quantum vs. QuantumScape: Which Moonshot Tech Stock Is a Better Buy in 2026?

Investors often weigh the risks of unproven but transformative technologies. Comparing D-Wave Quantum (NASDAQ:QBTS) and QuantumScape (NASDAQ:QS) highlights the choice between quantum computing and advanced battery storage for your long-term portfolio.

D-Wave is an early leader in commercial quantum computing, already generating revenue from global enterprises. QuantumScape is focused on perfecting solid-state batteries to disrupt the automotive industry but remains in the pre-revenue phase. Both companies represent high-stakes bets on scientific breakthroughs, making them frequent points of comparison for growth-oriented investors.

The case for D-Wave Quantum

D-Wave provides quantum computing systems and cloud-based services designed to solve complex business problems. Its customer base includes prominent names such as Mastercard (NYSE:MA), Pfizer (NYSE:PFE), and Siemens Healthineers (OTC:SEMHF). A partnership with CGI (NYSE:GIB) helps bring these quantum solutions to the logistics and retail sectors within the evolving tech stocks landscape.

In its latest annual report, filed for FY 2025, revenue reached nearly $24.6 million, representing growth of roughly 178.5% over the previous year. The company reported a net loss of approximately $355.1 million, leading to a negative net margin of about -1,444.1%. This growth trajectory is a key factor for the P/S ratio, which compares the stock price to sales over the past twelve months.

As of its December 2025 balance sheet, the debt-to-equity ratio was approximately 0.1x, which compares total debt to shareholder equity. The current ratio reached nearly 42.4x, which shows how easily a company can pay its short-term bills with its current assets. Free cash flow, or cash from operations minus capital spending, was negative $75.8 million for the year.

The case for QuantumScape

QuantumScape aims to redefine the battery industry by developing solid-state lithium-metal cells for electric vehicles. Its primary focus is on commercializing this technology alongside Volkswagen (OTC:VLKPF), its most significant industrial partner. The company also recently highlighted a multi-year agreement with Honda to evaluate its battery performance for future vehicle models.

In FY 2025, the company recorded revenue of $0.0 because its products are still in the prototype and testing phases. Without revenue, it reported a net loss of nearly $435.1 million during the same fiscal period. Net margin, which tracks how much of each sales dollar remains after expenses, is not currently applicable for the business while it remains pre-revenue.

As of its December 2025 balance sheet, the current ratio was roughly 15.9x, indicating a substantial cash cushion to fund development. Its debt-to-equity ratio was approximately 0.1x, meaning total debt remains low compared to the value provided by its shareholders. Free cash flow for the fiscal year was negative $278.8 million, reflecting the high costs of building out its testing facilities.

Risk profile comparison

D-Wave Quantum faces significant risks stemming from its status as an early-stage company with a history of substantial net losses. It must also compete with massive resources from firms like Microsoft (NASDAQ:MSFT), Amazon (NASDAQ:AMZN), and Intel (NASDAQ:INTC). The 2026 acquisition of Quantum Circuits adds complexity to its operational integration and technological roadmap.

QuantumScape is navigating the technical challenges of moving its battery technology from the lab to commercial production lines. The company is heavily dependent on its relationship with Volkswagen, making it vulnerable to strategy changes at its primary partner. Its capital-intensive business model may also require more funding, which could lead to shareholder dilution in the future.

Valuation comparison

D-Wave provides a clearer valuation path via its sales, while neither company currently has the positive future earnings estimates required for a Forward P/E ratio.

Valuation metrics sourced from Financial Modeling Prep (FMP) and may differ from other data providers.

Which stock would I buy in 2026?

I'd go with QuantumScape, though it is worth saying upfront that both of these are genuine moonshot stocks. They’re early-stage, unprofitable, and years from commercial scale. Anyone buying either one should understand they are making a speculative bet, not a conventional long-term investment.

D-Wave has paying customers, which sounds encouraging. But its revenue has barely moved in nearly two years while operating costs have surged dramatically. That means the business is burning through cash at a rate that makes its current valuation difficult to justify, even compared to a pre-revenue company.

QuantumScape's solid-state battery technology is still years from the automotive assembly line, and the timeline keeps stretching. But the company carries a substantial cash cushion that gives it real runway to get there without immediately needing to raise more money.

Between these two long shots, the one with more financial runway and a cleaner path to its first major commercial milestone seems like the more comfortable place to start.

Sara Appino has positions in Amazon. The Motley Fool has positions in and recommends Amazon, Intel, Mastercard, Microsoft, and Pfizer. The Motley Fool recommends CGI. The Motley Fool has a disclosure policy.