IonQ vs. Rigetti Computing: Which Pure-Play Quantum Pioneer Has the Stronger Technology Advantage?

Investors seeking to back a pure-play quantum computing pioneer face a choice between IonQ and Rigetti Computing. While both companies have long paths to viability, examining their respective technologies sheds light on which may hold the stronger advantage.

Rigetti Computing employs superconducting technology, which involves cooling particles to near absolute zero temperatures. This process is widely adopted by legacy tech companies and may prove challenging for Rigetti as it competes against heavyweight rivals with substantial resources.

In contrast, IonQ utilizes lasers to cool particles and an ion trap akin to a maze to harness these particles for quantum computing. This distinctive approach yields superior accuracy, albeit at the expense of processing speed. Quantum computing's accuracy is gauged through 2-qubit gate fidelity tests, which evaluate calculation accuracy after passing through two logic gates.

Rigetti's most advanced 108-qubit system achieved a 99.1% score, while IonQ's 256-qubit system clocked in at 99.99%. Despite the seemingly small difference, this represents a significant accuracy edge for IonQ.

Moreover, IonQ's products prioritize accuracy over speed, an advantage that could prove crucial in the quantum computing landscape. While superconducting approaches like Rigetti's excel in processing speed, accuracy is paramount for the technology to be truly useful. Speed enhancements are expected to follow as the field matures, positioning IonQ favorably from the outset.

IonQ's partnership-driven model and larger, more accurate technology have attracted more support, providing the company with additional resources for operations. Both IonQ and Rigetti rely heavily on external funding, as they sell only a limited number of early-stage research units annually. In Q2, IonQ reported $80.1 million in revenue, with some coming from acquisitions, while expecting over 100% growth in organic revenue this year. Rigetti's revenue stood at $5.1 million, up from $1.8 million the previous year.

Financially, IonQ boasts over $2 billion in cash and short-term investments, whereas Rigetti has over $500 million. While this cash reserve grants both companies longevity, IonQ's larger scale could prove advantageous. Given the high-risk nature of investing in quantum computing, neither company offers a guaranteed path to success, but IonQ's stronger technology advantage and growing partnerships make it a potentially more compelling choice for investors seeking a stake in the quantum computing future.