Key Points Quantum Computing Inc. uses photonic qubits and generated $384,000 in third-quarter sales. Rigetti employs superconducting qubits, and the company produced $1.9 million in Q3 revenue. 10 stocks we like better than Rigetti Computing › Many businesses are battling for supremacy in the rapidly evolving field of quantum computing. Two promising pure plays in the space are Quantum Computing Inc. (NASDAQ: QUBT), which also refers to itself as QCi, and Rigetti Computing (NASDAQ: RGTI). Both co ...