Key Points
IonQ uses a trapped ion approach for quantum computing.
Rigetti Computing is taking the superconducting approach.
10 stocks we like better than IonQ ›
Quantum computing is one of the next major technologies to hit the market. While various companies are still developing it, 2030 seems to be a significant turning point that nearly all quantum computing competitors point to as a key milestone in achieving commercial relevance.
However, if you wait to invest in quantum computing stocks until then, much of the growth will already be priced into the stocks. As a result, investors need to be looking at quantum computing companies now to give themselves the best chance at delivering jaw-dropping returns.
Where to invest $1,000 right now? Our analyst team just revealed what they believe are the 10 best stocks to buy right now. Learn More »
There are two ways to invest in quantum computing: Established big tech players or smaller pure plays. Two of the most popular pure-play quantum computing stocks are IonQ (NYSE: IONQ) and Rigetti Computing (NASDAQ: RGTI). But does either company stand out above the other as a top quantum computing investment pick?
Image source: Getty Images.
Both companies are striving for increased accuracy
Because both companies are quantum computing pure plays, they must achieve commercial relevance or their stocks will go to zero. It’s as simple as that. This represents a massive risk for investors, and anyone purchasing these stocks today must be willing to accept that they could become worthless in a few years.
On the flip side, because these two are quantum computing pure plays, the upside is immense. With that in mind, I’d suggest that no investor devote more than 1% of their portfolio to either of these two stocks. That way, if they lose the quantum computing race, it doesn’t affect your portfolio too much. But if you pick the winner, that 1% position can rise to become a massive part of your portfolio.
Both IonQ and Rigetti Computing are offering full-stack solutions to their clients, which means that they offer everything needed to run quantum computing calculations with their products. Rigetti recently announced a significant breakthrough with its primary offering, Ankaa-3. Its 36-qubit systems, powered by four, nine-qubit chips tied together, delivered a 99.5% two-qubit gate fidelity. This is a big deal, as computing accuracy is a huge part of why quantum computing isn’t more widespread today.
IonQ’s platform is currently outperforming it, with a 99.9% two-qubit gate fidelity. While that 0.4% improvement doesn’t sound like a ton, it’s a significant improvement. Furthermore, it’s due to launch its 100-qubit system soon.
IonQ appears to be in the lead, but could there be something that allows Rigetti to overtake it?
A balanced investing approach in this industry is smart
The biggest difference between these two companies is the approach they’re taking in the quantum computing realm. IonQ is using a trapped ion approach, while Rigetti is using a superconducting approach. There are benefits and drawbacks to each method, and either company could be heading toward an unforeseen dead end in the future with their respective approaches.
That’s why it’s important not to put all of your quantum computing investing eggs in one basket.
The superconducting approach requires cooling a particle to near absolute zero, which is a time-consuming and expensive process. The trapped ion approach can be done at room temperature, which could give IonQ the cost advantage it needs to scale its product quickly. On the flip side, the superconducting method can move calculations through gates faster, which could provide this technique with significant advantages over the trapped ion approach.
We’re still years away from understanding which approach will be the eventual winner, so if you’re interested in these two companies, I don’t think picking a winner is a good idea. Instead, buying both with the expectation that one will be a huge winner and the other a loser is a smart approach. You can only lose 100% on a single investment (unless you’re using some kind of leverage), while upside is unlimited. This mindset is key when investing in quantum computing, as there are bound to be both winners and losers.
Should you invest $1,000 in IonQ right now?
Before you buy stock in IonQ, consider this:
The Motley Fool Stock Advisor analyst team just identified what they believe are the 10 best stocks for investors to buy now… and IonQ wasn’t one of them. The 10 stocks that made the cut could produce monster returns in the coming years.
Consider when Netflix made this list on December 17, 2004… if you invested $1,000 at the time of our recommendation, you’d have $624,823!* Or when Nvidia made this list on April 15, 2005… if you invested $1,000 at the time of our recommendation, you’d have $1,064,820!*
Now, it’s worth noting Stock Advisor’s total average return is 1,019% — a market-crushing outperformance compared to 178% for the S&P 500. Don’t miss out on the latest top 10 list, available when you join Stock Advisor.
See the 10 stocks »
*Stock Advisor returns as of July 29, 2025
Keithen Drury has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.
