Quantum computing stocks are absolutely sizzling right now. Over the last year, two companies that have emerged as frontrunners in the quantum computing revolution are IonQ (IONQ -2.51%) and D-Wave Quantum.
In just 12 months, shares of IonQ have gained 511% while D-Wave Quantum stock has skyrocketed by nearly 2,000% as of this writing (Aug. 12).
Let's take a look at how each of these companies is investing in quantum computing technology and determine which artificial intelligence (AI) newcomer is the better buy.
Taking a look at IonQ's business
IonQ is taking a rather interesting approach to developing quantum computing applications. Instead of allocating its financial horsepower toward traditional supercomputers, IonQ offers quantum computing as a service that is accessed through cloud infrastructure.
This quantum-as-a-service (QaaS) approach is both unique and flexible, as companies leveraging Microsoft Azure, Amazon Web Services (AWS), or Alphabet's Google Cloud Platform (GCP) can access IonQ's quantum services directly through cloud-based integrations.
IONQ Revenue (TTM) data by YCharts
While IonQ's revenue has steadily risen over the last few years, the company's profitability has moved in the opposite direction. On the surface, investors might want to give IonQ some leniency here. Developing quantum computing requires hefty sums allocated toward research and development (R&D) and capital expenditures (capex).
At the end of the second quarter, IonQ boasted just $140 million on its balance sheet. When accounting for short-term investments in U.S. bonds, the company's cash and equivalents rises to $547 million. Furthermore, even after layering long-term bond investments on top of this sum, IonQ's total liquidity of $656 million is barely enough to cover another year's worth of operations under the current burn profile. With this position, the company may resort to further stock issuances to raise capital.
Given these dynamics, I think it's fair to question whether or not IonQ truly offers a viable solution that will yield improved unit economics in the long run.
Image source: Getty Images.
How does D-Wave compare to the competition?
D-Wave's approach to quantum computing is through the development of annealing services -- tools that are oriented for niche problem solving at fast speeds.
The table below summarizes D-Wave's revenue and profitability over the last 12 months:
| Category | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 |
|---|---|---|---|---|
| Revenue | $1.9 million | $2.3 million | $15.0 million | $3.1 million |
| Net Income | ($22.7 million) | ($86.1 million) | ($5.4 million) | ($167.3 million) |
| Cash and equivalents | $29.3 million | $177.9 million | $304.3 million | $819.3 million |
Data Source: D-Wave Investor Relations
There is a lot to unpack from the financial profile above. The first anomaly that sticks out is the lumpiness of D-Wave's revenue -- with roughly 68% of trailing-12-months sales occurring in just one quarter. To me, the inconsistency of D-Wave's revenue generation suggests that its annealing tools are not yet fetching robust demand.
In addition, the company's liquidity continues to rise despite having barely any sales coming through the door and losses mounting each quarter. How is that possible?
Just like IonQ is doing, D-Wave is tapping the capital markets to raise cash through multiple series of at-the-money (ATM) offerings.
IonQ vs. D-Wave Quantum: Which is the better stock?
If I had to choose a winner between IonQ and D-Wave Quantum, my preference would lean toward IonQ as the superior choice. With that said, I see both stocks as highly speculative opportunities.
IONQ PS Ratio data by YCharts
Right now, both IonQ and D-Wave have limited business traction in the grand scheme of things. Nevertheless, each company trades at market capitalizations well into the billions and boasts valuation multiples that echo what investors witnessed during previous stock market bubbles. Management at both companies seem to recognize this frothiness -- continuing to raise capital at these inflated stock prices.
While this may be acceptable in the short-term, it is not a sustainable capital allocation strategy. It raises doubts about their ability to achieve critical scale, generate accelerating revenue, and transition to positive unit economics.
For that reason, I'd steer clear of both stocks unless you are prepared to assume outsized levels of risk and volatility.
