Quantum componentsFreshwater Quarry, Brixham Laboratory, Brixham Tq5 8Ba, Brixham
BAY Photonics
Specializes in photonic assembly and packaging for quantum, sensing, and telecom applications, from prototype to production.
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Quantum components10C Commerce Way, Woburn
Forward Photonics
Develops high-power semiconductor lasers including Quantum Cascade lasers for defense, industrial, and scientific applications. Technology originated at MIT…
Quantum components41 Aero Camino, Santa Barbara
Freedom Photonics
Freedom Photonics, now part of Quantum Computing Inc., produces photonic solutions including diffraction-limited 1550 nm lasers, amplifiers, and fast…
Quantum components2a ROSEBANK ROAD, ROSEBANK, Livingston
Helia Photonics
Provides III-V and silicon photonics back-end-of-line processes, thin-film optical coatings, and quantum technology coatings and back-end processing.
Quantum components313 Enterprise Dr, Plainsboro
Innovative Photonic Solutions
Develops and manufactures wavelength-stabilized lasers including narrow linewidth lasers for quantum computing, femtosecond lasers, and lasers for…
Quantum sensing and metrologyR103, Fermi Avenue, Harwell Campus, Oxford
Quantum Detectors Ltd.
Develops advanced direct electron detectors and readout systems for electron microscopy and X-ray research. Products include MerlinEM, Merlin T4, and Xspress 3…
Quantum buying guides
Quantum technology glossary
Plain-language definitions of key terms in quantum computing, sensing, networking, cryptography and components. Updated quarterly.
Read guide: Quantum technology glossary
Quantum buying guides
How to buy quantum cloud time
Compare AWS Braket, Azure Quantum and IBM Quantum Platform pricing, access models and free tiers for gate-model QPUs, annealers and simulators.
Read guide: How to buy quantum cloud timeAll quantum buying guides
Quantum buying guides
- Quantum technology glossary
Plain-language definitions of key terms in quantum computing, sensing, networking, cryptography and components. Updated quarterly.
- How to buy quantum cloud time
Compare AWS Braket, Azure Quantum and IBM Quantum Platform pricing, access models and free tiers for gate-model QPUs, annealers and simulators.
- How to vet a quantum vendor
A procurement checklist for evaluating quantum hardware, software, cloud and services vendors. Technical, commercial and compliance questions to ask before you sign.
- Post-quantum cryptography migration timeline
NIST FIPS 203/204/205 (ML-KEM, ML-DSA, SLH-DSA), NSA CNSA 2.0 and US OMB M-26-15 deadlines for federal and commercial migration.
- Quantum careers and skills
Roles, skills, salaries and hiring trends for quantum computing, sensing, networking and cryptography. University programs, certifications and transition paths from classical tech.
- Quantum computing modalities compared
Compare superconducting, trapped-ion, neutral-atom, photonic, spin-qubit and topological quantum computers by qubit count, fidelity, connectivity and cloud availability.
- Quantum funding and market data 2025
Global public and private investment in quantum technology. Government programs, venture capital, M&A and revenue estimates from McKinsey, BCG, PitchBook and government sources.
- Quantum sensing use cases
Real-world applications of quantum magnetometers, gravimeters, atomic clocks and inertial sensors in defense, healthcare, navigation and resource exploration.
Countries
Cities
Categories
Questions
Which countries have the most quantum companies?
The countries with the most quantum companies are United States (46 quantum companies), Germany (19 quantum companies), United Kingdom (18 quantum companies), Canada (14 quantum companies), and Netherlands (10 quantum companies).
Which cities have the most quantum companies?
The cities with the most quantum companies are Boulder, CO (6 quantum companies), Montreal, QC (4 quantum companies), Munich, Munich (4 quantum companies), Waterloo, ON (4 quantum companies), and Delft, Delft (3 quantum companies).
What kinds of quantum companies are listed?
Quantum Companies lists Quantum components (69 quantum companies), Quantum hardware (40 quantum companies), Quantum sensing and metrology (32 quantum companies), Quantum software and algorithms (28 quantum companies), and Quantum networking and QKD (27 quantum companies).
Does a listing mean a company has been vetted?
No. A listing records public business facts from the company's own website and Overture Maps. Check technical claims, references and contracts yourself. A paid badge is not a technical qualification.
Where does the data come from?
Business websites and Overture Maps, fetched 2026-11-01. Each record keeps its source. Owners can claim listings and supply modality, qubit counts, cloud access and project details.
Can I compare qubit counts across companies?
Qubit count alone does not determine capability. Compare modality, connectivity, gate fidelity, coherence times and error rates. We record only the published qubit count; ask each vendor for full benchmarks.
Image credits
OJB Quantum, CC BY 4.0, commons.wikimedia.org · Mnolf, CC BY-SA 3.0, commons.wikimedia.org · OJB Quantum, CC BY 4.0, commons.wikimedia.org · Alessio Coser, CC BY 4.0, commons.wikimedia.org.
Published by Quantum Companies. How we check each quantum company.