IonQ vs. Quantum Computing Inc.: Which Quantum Computing Stock Is a Better Buy in 2026?

The article compares two quantum computing companies: IonQ, which uses trapped-ion technology and achieved $130M in FY2025 revenue (202% growth), and Quantum Computing Inc., which focuses on photonic chips with only $682K in revenue (82.8% growth). Despite both companies posting significant losses, IonQ is recommended as the better buy due to stronger revenue momentum ($80.1M in Q2 2026, 287% YoY growth), a $28M DARPA contract, and a more attractive valuation multiple.