IonQ (NYSE: IONQ) and Rigetti Computing (NASDAQ: RGTI) remain two of the most closely watched pure-play quantum computing stocks among retail and institutional investors alike.
Pure-play quantum computing startups carry significant risk, as they must deliver a commercially viable product or face the prospect of bankruptcy.
The upside for successful pure-plays, however, is considerably larger than it would be for diversified technology giants with quantum computing divisions.
IonQ relies on trapped-ion technology, an approach that prioritizes accuracy over processing speed, placing it at the opposite end of the spectrum from superconducting systems.
In October 2025, IonQ achieved 99.99% two-qubit gate fidelity, a significant milestone that will be integrated into its forthcoming 256-qubit system.
That combination of high fidelity and greater qubit capacity gives IonQ a meaningful technological edge over Rigetti, though breakthroughs in superconducting research could shift that balance in the coming years.
The financial gap between the two companies is stark, with IonQ reporting Q1 revenue of nearly $65 million, representing a 755% increase year over year.
While a portion of that growth was driven by acquisitions, the figures still reflect substantially stronger partnership activity and system sales than Rigetti has managed to produce.
Rigetti’s Q1 revenue grew from $1.47 million in 2025 to $4.4 million in the same quarter of 2026, a meaningful percentage gain that nonetheless represents only a fraction of IonQ’s commercial traction.
The revenue disparity suggests the market has considerably more confidence in IonQ’s product offering at this stage of the quantum computing race.
Rigetti is not without a path forward, and the sector as a whole remains far from delivering quantum computing at widespread commercial scale, leaving room for competitive dynamics to shift.
Until Rigetti demonstrates a more convincing commercial trajectory, IonQ stands as the stronger and more compelling quantum computing stock for investors looking at the pure-play space.
