PsiQuantum vs Quantum Circuits, Inc.
PsiQuantum
Building the world’s first useful quantum computers
628 employees · est. 2015 · Palo Alto, United States
Quantum Circuits, Inc.
Building quantum computers designed to scale
77 employees · est. 2015 · New Haven, United States
PsiQuantum is the larger of the two.
2 signals in the last 90 days
Side-by-Side Comparison
| Metric | PsiQuantum | Quantum Circuits, Inc. |
|---|---|---|
| Founded | ||
| Founded | 2015 | 2015 |
| Headquarters | ||
| Headquarters | Palo Alto, United States | New Haven, United States |
| Employees | ||
| Employees | 628 larger | 77 |
| Industry | ||
| Industry | Hardware, IT, Quantum | IT, Manufacturing, Quantum |
| Funding Stage | ||
| Funding Stage | Series E | Acquired |
| Total Funding | ||
| Total Funding | $2.98B | $654.50M |
| Funding Rounds | ||
| Funding Rounds | 9 | 6 |
| Services | ||
| Services | Development of Utility-Scale Quantum Computers, Quantum Software Development, Quantum Circuit Design, Consulting for Industrial Quantum Applications | Quantum Error Detection, Real-Time Control Flow, Error Detection Handling, Development of Quantum Algorithms, Quantum Application Hosting |
| Target Customers | ||
| Target Customers | Quantum Algorithm Researchers, Healthcare and Oncology Researchers, Industrial and Technological Partners, Semiconductor Manufacturing Companies, Governmental Organizations | Quantum Researchers, Tech Companies, Developers in Quantum Computing, Businesses Exploring Quantum Solutions, Academic Institutions in Quantum Studies, Innovation-focused Enterprises |
| Taxonomy | ||
| Taxonomy | Quantum ComputingPhotonicsQuantum Error CorrectionSemiconductorsQuantum AlgorithmsQuantum Technology +9 | Quantum ComputingSuperconducting DevicesQuantum CircuitsError CorrectionScalable ArchitectureQuantum Algorithms +9 |
| Website | ||
| Website | psiquantum.com | quantumcircuits.com |
About PsiQuantum
PsiQuantum, founded in 2015, stands at the forefront of revolutionary technological development, aiming to build the world’s first useful quantum computers. Their slogan, "Building the world’s first useful quantum computers," reflects their ambitious mission. Grounded in the belief that photonics is...
About Quantum Circuits, Inc.
Quantum Circuits, Inc., headquartered in the United States, is at the forefront of the quantum computing revolution, developing a full-stack platform tailored for scalability using superconducting devices. Founded in 2015, the company's mission is encapsulated in its slogan: "Building quantum comput...
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Compiled from the BounceWatch company index. We last looked at PsiQuantum on 8 Apr 2026, and Quantum Circuits, Inc. on 2 Mar 2026. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.
