Independent student research — not an investment firm or financial advice
Competitive Comparison
IonQ vs. Rigetti Computing
A watchlist comparison of two publicly traded quantum-computing companies pursuing different hardware approaches — trapped-ion versus superconducting qubits.
Metric
IonQ (IONQ)
Rigetti Computing (RGTI)
PEG ratio
0.55
N/A (unprofitable, negative earnings)
FY26 Adj. EBITDA
guidance ($310)–($330)M loss
not disclosed; EV/EBITDA not available
Market cap
$16.71B
$4.88–5.5B
Market cap, compared
IONQ
$16.71B
RGTI
$5.19B
Same Market cap figures as the table above, plotted for a direct read. Bold = held in this book.
Market cap, P/E, PEG, EV/EBITDA, and capex sourced via public filings and financial-data aggregators (GuruFocus, StockAnalysis, company earnings releases), as of July 2026. PEG ratio sourced primarily from GuruFocus where available; different providers use different growth-rate assumptions, so figures elsewhere for the same stock can vary by several multiples. Gold-highlighted column(s) indicate the name(s) actually held in this book.
Why neither is in the book
IonQ uses trapped-ion qubit technology; Rigetti uses superconducting qubits — a genuine technical fork in how each company is trying to get to fault-tolerant quantum computing, with no consensus yet on which approach wins long-term. Both are pre-commercial-scale, deeply unprofitable businesses priced almost entirely on the size of the eventual quantum-computing market rather than current financials, which is exactly the kind of thesis I don't have enough conviction to underwrite yet. Both stay on the watchlist rather than the book until there's a clearer technical or commercial signal from either company.