Rigetti Computing

Rigetti Computing is a quantum hardware company founded in 2013 by Chad Rigetti, a former IBM quantum researcher. It is headquartered in Berkeley, California, and trades publicly on the Nasdaq under the ticker RGTI, with a market capitalization that has ranged roughly from $6 billion to $8 billion and tends to be volatile. The company maintains a strong balance sheet for its stage, holding about $571 million in cash with no debt.

Rigetti builds quantum processors from superconducting qubits, but its defining characteristic is how it assembles them. Rather than fabricating a single large monolithic chip, Rigetti uses a chiplet architecture that tiles several smaller qubit chips into one working processor. Because each small chiplet is easier to fabricate with high yield and to test individually, the company can compose a larger processor from known-good pieces. This modular approach is Rigetti's primary bet on how quantum machines will scale to useful sizes over time.

The company's flagship system is Cepheus-1-108Q, a 108-qubit processor built from twelve nine-qubit chiplets with a median two-qubit gate fidelity of about 99.1 percent. Cepheus became generally available in April 2026 and was the first system above 100 qubits to validate the chiplet scaling approach. Rigetti's roadmap targets a system with more than 150 qubits at about 99.7 percent median two-qubit gate fidelity by the end of 2026.

Rigetti ties its hardware to AI and classical computing through NVIDIA NVQLink, a connection layer for hybrid quantum-classical work that delivers roughly a 3-times hybrid speedup, and through a partnership with Algorithmiq that applies quantum machine learning to financial fraud detection. Commercial access is available through Rigetti Quantum Cloud Services, Amazon Braket, and Microsoft Azure, and the company also sells Novera, a purchasable on-premises quantum processing unit.