# Top 20 Quantum Computing Startups in the United States by Funding (2026)

> The 20 best-funded quantum computing startups in the United States, ranked by total funding raised: $5.2B combined.

Source: https://millionrounds.com/top-lists/quantum-computing-startups-united-states (Millionrounds; every figure on the page links to its filing or article)

- 1 [**PsiQuantum** PsiQuantum develops quantum computer using photonic qubits and silicon photonics to build fault-tolerant quantum computing systems.](https://millionrounds.com/company/psiquantum) PsiQuantum develops quantum computer using photonic qubits and silicon photonics to build fault-tolerant quantum computing systems. *Founded* - Palo Alto, United States **$2.1B** last round Jul 2026
- 2 [**Oratomic** Oratomic is a quantum computing startup based in Pasadena, California, founded on March 31, 2026.](https://millionrounds.com/company/oratomic) Oratomic is a quantum computing startup based in Pasadena, California, founded on March 31, 2026. *Founded* - South Pasadena, United States **$775M** last round Oct 2026
- 3 [**Quantinuum** Quantinuum accelerates quantum computing and the development of applications across chemistry, cybersecurity, finance, and optimization.](https://millionrounds.com/company/quantinuum) Quantinuum accelerates quantum computing and the development of applications across chemistry, cybersecurity, finance, and optimization. *Founded* 2021 Broomfield, United States **$700M** last round Sept 2026
- 4 [**SandboxAQ**](https://millionrounds.com/company/sandboxaq) *Founded* - United States **$650M** last round Jun 2026
- 5 [**QuEra Computing** QuEra Computing is a neutral-atoms-based quantum computing startup, located in Boston, near Harvard University.](https://millionrounds.com/company/quera-computing) QuEra Computing is a neutral-atoms-based quantum computing startup, located in Boston, near Harvard University. *Founded* 2018 Boston, United States **$230M** last round Feb 2025
- 6 [**Atom Computing** Atom Computing is a quantum computing company based in Berkeley, California, with a commercial facility in Boulder, Colorado.](https://millionrounds.com/company/atom-computing) Atom Computing is a quantum computing company based in Berkeley, California, with a commercial facility in Boulder, Colorado. *Founded* 2018 Berkeley, United States **$200M** last round Nov 2026
- 7 [**Quantum Art**](https://millionrounds.com/company/quantum-art) *Founded* - United States **$108M** last round Dec 2025
- 8 [**D-Wave**](https://millionrounds.com/company/d-wave) *Founded* - United States **$100M** last round Nov 2026
- 9 [**Rigetti Computing** Rigetti Computing is a quantum computing company that builds and deploys full-stack quantum systems with superconducting qubits.](https://millionrounds.com/company/rigetti-computing) Rigetti Computing is a quantum computing company that builds and deploys full-stack quantum systems with superconducting qubits. *Founded* 2013 Berkeley, United States **$64M** last round Jun 2025
- 10 [**Monarch Quantum** Monarch Quantum, Inc.](https://millionrounds.com/company/monarch-quantum) Monarch Quantum, Inc. *Founded* 2025 San Diego, United States **$55M** last round Apr 2026
- 11 [**Qolab** Qolab is a quantum hardware company based in Los Angeles, California, with research activities in Madison, Wisconsin.](https://millionrounds.com/company/qolab) Qolab is a quantum hardware company based in Los Angeles, California, with research activities in Madison, Wisconsin. *Founded* 2022 Los Angeles, United States **$54M** last round Jul 2026
- 12 [**SEEQC**](https://millionrounds.com/company/seeqc) *Founded* - United States **$49M** last round Jan 2026
- 13 [**Mesa Quantum** Mesa Quantum is a semiconductor company based in Boulder, Colorado, founded in 2023.](https://millionrounds.com/company/mesa-quantum) Mesa Quantum is a semiconductor company based in Boulder, Colorado, founded in 2023. *Founded* 2023 Bonita Springs, United States **$23M** last round Sept 2026
- 14 [**Aliro**](https://millionrounds.com/company/aliro) *Founded* - United States **$18M** last round Feb 2026
- 15 [**ColdQuanta** Cold Quanta works in Cold Atom Quantum Technology, the most scalable, versatile, and commercially viable application of quantum.](https://millionrounds.com/company/coldquanta) Cold Quanta works in Cold Atom Quantum Technology, the most scalable, versatile, and commercially viable application of quantum. *Founded* 2007 Boulder, United States **$17M** last round Nov 2020
- 16 [**memQ** memQ is a Chicago-based quantum technology company focused on scalable, distributed quantum computing.](https://millionrounds.com/company/memq) memQ is a Chicago-based quantum technology company focused on scalable, distributed quantum computing. *Founded* 2022 Chicago, United States **$13M** last round Apr 2026
- 17 [**BlueQubit** BlueQubit is a quantum software platform that offers software library for enterprise, defense, and academic customers.](https://millionrounds.com/company/bluequbit) BlueQubit is a quantum software platform that offers software library for enterprise, defense, and academic customers. *Founded* - Los Angeles, United States **$12M** last round Jul 2026
- 18 [**Photon Queue** Photon Queue is a quantum hardware startup founded in 2025, emerging from the University of Illinois Urbana-Champaign.](https://millionrounds.com/company/photon-queue) Photon Queue is a quantum hardware startup founded in 2025, emerging from the University of Illinois Urbana-Champaign. *Founded* 2025 Champaign, United States **$4.0M** last round Jul 2026
- 19 [**QC82** QC82 is a quantum computing startup based in College Park, Maryland, founded in 2020.](https://millionrounds.com/company/qc82) QC82 is a quantum computing startup based in College Park, Maryland, founded in 2020. *Founded* 2020 College Park, United States **$1.5M** last round Dec 2025
- 20 [**Resilient Entanglement** Resillient Entanglement is R&D firm in the Quantum-Grid field.](https://millionrounds.com/company/resilient-entanglement) Resillient Entanglement is R&D firm in the Quantum-Grid field. *Founded* 2020 Denver, United States **$250K** last round Nov 2021

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies whose funding rounds we classed as this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

## Who backed them?

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## More lists for United States

[See all](https://millionrounds.com/top-lists?r=United%20States)

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