IonQ and Rigetti Computing: Which Quantum Stock Comes Out on Top?

IonQ and Rigetti Computing: A Look at Quantum Stocks

IonQ (NYSE:IONQ) and Rigetti Computing (NASDAQ:RGTI) stand out as significant players in the quantum computing market. It’s interesting to note that while both companies utilize trapped ion technology, their approaches diverge in whether they use superconducting qubits or not. Whatever the technical details, the real question is how practical these technologies are and whether they can be commercially viable. Their intended industries are varied, touching on everything from AI to finance, defense, cybersecurity, and manufacturing.

IonQ recently shared a quarterly report that was quite promising. They exceeded revenue expectations and even adjusted their full-year revenue forecast to a maximum of $110 million. However, there’s a catch; their operating costs continue to loom large over their revenue, which totaled $473 million in expenses during the first nine months of this year.

Additionally, IonQ managed to secure a $2 billion capital raise through new stock sales. This was essential for their ongoing operations, although it does raise concerns about shareholder dilution—something that can definitely be a red flag for long-term investors.

On the flip side, Rigetti Computing is a smaller entity with a market cap around $8.4 billion. Their reported revenue was only $5.2 million for the first three quarters of 2025, and similar to IonQ, their operating losses were dramatically larger than their revenues—coming in at $63.4 million during the same period.

Despite these challenges, Rigetti’s technology shows promise, particularly its semiconductor sector which could expand significantly. In terms of valuation, IonQ is currently more appealing when compared to Rigetti.

Determining a clear “winner” between the two is tricky. IonQ appears to have a stronger foothold, backed by significant partnerships. But, if you’re considering a high-risk, potentially high-reward investment, Rigetti might just catch your eye someday.