IonQvs.Quantum Computing Inc.
IONQ vs QUBT · both in Quantum hardware & platforms, part of the Quantum computing value chain: The companies building the quantum computers themselves, trapped ions, superconducting qubits, photonics and annealing.
IonQ is about 9.5× larger than Quantum Computing Inc. by market cap; year to date, IonQ leads (−7.9% vs −25.7%).
Side by side
| IONQ | QUBT | |
|---|---|---|
| Market cap | $16B | $1.7B |
| Price | $39.45 | $7.45 |
| Today | −4.6% | −2.2% |
| Return YTD | −7.9% | −25.7% |
| Return 1Y | −47.8% | −65.4% |
| Since July 10, 2026 | −8.0% | −14.0% |
| P/E | — | — |
| P/S | 64.8 | 171.1 |
| P/B | 3.2 | 1.1 |
Data as of 2026-10-08 · updates daily after U.S. close
Since July 10, 2026: the change in the closing price from the first session with a close for both companies. Sectivia records these closes itself, starting June 26, 2026.
The two companies
IonQIONQ
Trapped ion is the bet here, with high qubit fidelity as the claim. The systems are reachable through AWS, Azure and Google Cloud, and a run of acquisitions points the roadmap toward quantum networking. Not yet profitable.
Full IONQ profile →Quantum Computing Inc.QUBT
Photonics instead of superconductors: integrated photonic chips, reservoir computing and quantum sensing, made in its own thin-film lithium-niobate foundry. Speculative.
Full QUBT profile →More IONQ & QUBT comparisons
Other head-to-heads in the Quantum hardware & platforms segment.