Quantum Machines
Accelerating the Realization of Practical Quantum Computers
237 employees · est. 2018 · Claymont, United States
Rigetti Computing
We are scientists, engineers, builders, and visionaries
181 employees · est. 2013 · Berkeley, United States
Rigetti Computing is the older company (2018 vs 2013); Quantum Machines is the larger of the two.
Side-by-Side Comparison
| Metric | Quantum Machines | Rigetti Computing |
|---|---|---|
| Founded | ||
| Founded | 2018 | 2013 older |
| Headquarters | ||
| Headquarters | Claymont, United States | Berkeley, United States |
| Employees | ||
| Employees | 237 larger | 181 |
| Industry | ||
| Industry | Quantum | AI, Big Data, Hardware |
| Funding Stage | ||
| Funding Stage | Series C | IPO |
| Total Funding | ||
| Total Funding | $363.00M | $775.53M |
| Funding Rounds | ||
| Funding Rounds | 7 | 18 |
| Services | ||
| Services | Quantum Computing Control and Electronics Solution from Room Temperature to Cryogenics | Quantum Processing Unit Manufacturing, Quantum Algorithm Development, Quantum Systems Deployment, Quantum Computing Platforms |
| Target Customers | ||
| Target Customers | Full-stack quantum computing vendors, HPC centers, and leading quantum research labs | Quantum Researchers, Technological Innovators, Academic Institutions, Industrial R&D Departments |
| Taxonomy | ||
| Taxonomy | Quantum Computing, Quantum Control, Quantum Orchestration Platform, Quantum Software, Quantum Hardware, Quantum Electronics, Quantum System Development, Quantum Technology, Engineering Solutions, Multidisciplinary Team, Electrical Engineering, RF Microwave Engineering, Algorithmics, Digital Signal Processing | Quantum Computing, Superconducting Qubits, Quantum Processor Manufacturing, Full-stack Quantum Solutions, Quantum Cloud Services, Integrated Quantum Devices, Quantum Algorithms Development, Quantum-Classical Integration, Computational Chemistry, Machine Learning Applications, Quantum Hardware Engineering, Control Electronics, Cryogenic Systems, Multi-chip Quantum Processor, Quantum R&D |
| Website | ||
| Website | quantum-machines.co | rigetti.com |
About Quantum Machines
Quantum Machines, founded in 2018, is spearheading the evolution of quantum computing from its headquarters in the United States. With the slogan, "Accelerating the Realization of Practical Quantum Computers," the company is on a mission to revolutionize industries by harnessing quantum technology....
About Rigetti Computing
Rigetti Computing, founded in 2013 and headquartered in the United States, is leading the quantum computing revolution as a pioneer in full-stack quantum solutions. The company is recognized for its innovative approach utilizing superconducting qubits, known for high maturity and fast gate speeds, a...
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Funding, hiring, leadership and stack changes at Quantum Machines and Rigetti Computing — by email.
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Compiled from the BounceWatch company index. We last looked at Quantum Machines on 20 Oct 2025, and Rigetti Computing on 16 Apr 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.