Top 100 Quantum Companies
Search 100 companies by category, technology or disclosed location. Tap a company to expand.
Updated November 2026. The quantum industry extends beyond the processor. This editorial directory helps research teams, buyers and investors compare hardware developers with the control, networking, sensing and security suppliers around them.
Inside Deep Tech's editorial ranking as of November 2026 considers publicly reported funding and valuation where verified, commercial traction such as deployments, revenue, named customers and contracts, and technical significance. It isn't a financial index or investment advice; the order is an editorial judgment, not a numerical score.
The scope includes superconducting, trapped-ion, neutral-atom, photonic, spin and topological approaches, alongside annealing, quantum software, enabling hardware and communications. Post-quantum cryptography is included as an adjacent security market, not as quantum computing hardware.
1. IBM Quantum
IBM develops superconducting quantum processors, modular systems and the Qiskit software stack.
Superconducting | Yorktown Heights, NY, USA | Undisclosed
2. Google Quantum AI
Google Quantum AI develops superconducting processors and quantum error-correction experiments.
Superconducting | Santa Barbara, CA, USA | Undisclosed
3. Quantinuum
Quantinuum builds trapped-ion quantum computers and the TKET software toolkit.
Trapped Ion | Broomfield, CO, USA | $600M raised · ~$10B valuation
4. IonQ
IonQ develops trapped-ion quantum processors and quantum networking systems.
Trapped Ion | College Park, MD, USA | Public (NYSE: IONQ) · ~$20B market cap
5. PsiQuantum
PsiQuantum develops fault-tolerant quantum computing using photonic chips and semiconductor manufacturing.
Photonic | Palo Alto, CA, USA | ~$1.65B raised · ~$7B+ valuation
6. Microsoft Quantum
Microsoft develops quantum computing research, Azure Quantum services and topological-qubit technology.
Topological | Redmond, WA, USA | Undisclosed
7. Amazon Braket
Amazon Braket provides cloud access to quantum hardware and tools for quantum algorithm development.
Services | Seattle, WA, USA | Undisclosed
8. D-Wave Quantum
D-Wave develops quantum annealing systems and hybrid optimization services.
Annealing | Palo Alto, CA, USA | Public (NYSE: QBTS)
9. Rigetti Computing
Rigetti develops superconducting quantum processors and integrated quantum computing systems.
Superconducting | Berkeley, CA, USA | Public (Nasdaq: RGTI)
10. IQM Quantum Computers
IQM builds superconducting quantum computers for research institutions and computing centers.
Superconducting | Espoo, Finland | ~$550M+ raised
11. QuEra Computing
QuEra develops neutral-atom quantum computers using programmable arrays of atoms.
Neutral Atom | Boston, MA, USA | $230M financing announced February 2025; expanded September 2025
12. Pasqal
Pasqal builds neutral-atom processors for quantum simulation and computing.
Neutral Atom | Massy, France | ~€340M+ raised
13. Atom Computing
Atom Computing develops quantum computers based on optically trapped neutral atoms.
Neutral Atom | Berkeley, CA, USA | Undisclosed
14. Xanadu
Xanadu develops photonic quantum computing hardware and the PennyLane software framework.
Photonic | Toronto, Canada | ~$275M raised · public via SPAC
15. Quantum Machines
Quantum Machines supplies OPX control systems for operating quantum processors.
Software & Control | Tel Aviv, Israel | ~$280M raised
16. Q-CTRL
Q-CTRL develops quantum control software and quantum sensing technology.
Software & Control | Sydney, Australia | Undisclosed
17. Classiq
Classiq provides a software platform for designing and synthesizing quantum algorithms.
Software & Control | Tel Aviv, Israel | Undisclosed
18. Alice & Bob
Alice & Bob develops superconducting cat qubits for fault-tolerant quantum computing.
Superconducting | Paris, France | Undisclosed
19. Nord Quantique
Nord Quantique develops bosonic quantum error-correction hardware using superconducting circuits.
Superconducting | Sherbrooke, Canada | Undisclosed
20. Oxford Quantum Circuits
OQC develops superconducting quantum computers and cloud-accessible quantum services.
Superconducting | Reading, UK | Undisclosed
21. Intel Quantum
Intel develops silicon spin-qubit devices and cryogenic control electronics for quantum computing.
Spin / Diamond | Santa Clara, CA, USA | Undisclosed
22. Universal Quantum
Universal Quantum develops trapped-ion processors designed around electronic control and modular integration.
Trapped Ion | Brighton, UK | Undisclosed
23. AQT
Alpine Quantum Technologies builds trapped-ion quantum computers and supporting technology.
Trapped Ion | Innsbruck, Austria | Undisclosed
24. eleQtron
eleQtron develops trapped-ion quantum processors using microwave-based control.
Trapped Ion | Siegen, Germany | Undisclosed
25. planqc
planqc develops neutral-atom quantum computers with optical-lattice technology.
Neutral Atom | Garching, Germany | Undisclosed
26. Infleqtion
Infleqtion develops neutral-atom quantum computers, sensing systems and quantum software.
Neutral Atom | Boulder, CO, USA | Undisclosed
27. Quantum Brilliance
Quantum Brilliance develops diamond-based quantum computing devices designed for room-temperature operation.
Spin / Diamond | Canberra, Australia | Undisclosed
28. Diraq
Diraq develops silicon spin-qubit quantum computing technology compatible with semiconductor fabrication.
Spin / Diamond | Sydney, Australia | Undisclosed
29. Silicon Quantum Computing
SQC develops atomic-scale silicon quantum processors using precision placement of dopants.
Spin / Diamond | Sydney, Australia | Undisclosed
30. Quantum Motion
Quantum Motion develops silicon spin-qubit devices and integrated control technology.
Spin / Diamond | London, UK | Undisclosed
31. Equal1
Equal1 develops silicon quantum computing systems integrating qubits and control electronics.
Spin / Diamond | Dublin, Ireland | Undisclosed
32. SemiQon
SemiQon develops silicon-based quantum processors and cryogenic semiconductor technology.
Spin / Diamond | Espoo, Finland | Undisclosed
33. Quobly
Quobly develops silicon spin-qubit processors using semiconductor manufacturing techniques.
Spin / Diamond | Grenoble, France | Undisclosed
34. Sparrow Quantum
Sparrow Quantum supplies single-photon sources for photonic quantum technologies.
Photonic | Copenhagen, Denmark | Undisclosed
35. Quandela
Quandela develops photonic quantum processors and single-photon source technology.
Photonic | Massy, France | Undisclosed
36. ORCA Computing
ORCA develops photonic quantum computing systems using optical fiber and quantum memory.
Photonic | London, UK | Undisclosed
37. QuiX Quantum
QuiX supplies photonic quantum processors and develops photonic quantum computing systems.
Photonic | Enschede, Netherlands | Undisclosed
38. Quantum Computing Inc.
QCi develops photonic computing devices and thin-film lithium niobate fabrication technology.
Photonic | Hoboken, NJ, USA | Undisclosed
39. Photonic Inc.
Photonic develops distributed quantum computing using photonically connected silicon spin systems.
Spin / Diamond | Coquitlam, Canada | Undisclosed
40. TuringQ
TuringQ develops photonic quantum computing hardware and integrated optical technology.
Photonic | Shanghai, China | Undisclosed
41. Qunnect
Qunnect develops quantum networking devices for distributing entanglement over optical fiber.
Communications | New York, NY, USA | Undisclosed
42. Aliro Quantum
Aliro develops software for designing, simulating and operating entanglement-based quantum networks.
Communications | Boston, MA, USA | Undisclosed
43. Welinq
Welinq develops quantum interconnects and quantum memories for linking quantum processors.
Communications | Paris, France | Undisclosed
44. Nu Quantum
Nu Quantum develops networking technology for connecting quantum computing systems.
Communications | Cambridge, UK | Undisclosed
45. QphoX
QphoX develops microwave-to-optical transducers for connecting quantum processors through fiber networks.
Communications | Delft, Netherlands | Undisclosed
46. Qblox
Qblox supplies modular control electronics for operating quantum processors.
Software & Control | Delft, Netherlands | Undisclosed
47. Zurich Instruments
Zurich Instruments makes measurement instruments and quantum computing control systems.
Software & Control | Zurich, Switzerland | Undisclosed
48. Riverlane
Riverlane develops Deltaflow quantum error-correction technology for quantum computing systems.
Software & Control | Cambridge, UK | Undisclosed
49. QunaSys
QunaSys develops quantum algorithms and software for chemistry and materials research.
Software & Control | Tokyo, Japan | Undisclosed
50. QSimulate
QSimulate develops quantum chemistry simulation software for molecular and materials research.
Software & Control | Boston, MA, USA | Undisclosed
51. QC Ware
QC Ware develops quantum and quantum-inspired software for enterprise computing applications.
Software & Control | Palo Alto, CA, USA | Undisclosed
52. Multiverse Computing
Multiverse develops quantum-inspired optimization and model-compression software.
Software & Control | San Sebastián, Spain | Undisclosed
53. Phasecraft
Phasecraft develops quantum algorithms for materials simulation and other practical applications.
Software & Control | Bristol, UK | Undisclosed
54. Zapata Quantum
Zapata develops quantum software and algorithms for computational research applications.
Software & Control | Boston, MA, USA | Undisclosed
55. Algorithmiq
Algorithmiq develops quantum algorithms for chemistry and life-science applications.
Software & Control | Helsinki, Finland | Undisclosed
56. Kipu Quantum
Kipu develops application-specific quantum algorithms and software for quantum processors.
Software & Control | Karlsruhe, Germany | Undisclosed
57. Qilimanjaro Quantum Tech
Qilimanjaro develops analog quantum computing hardware and supporting software.
Annealing | Barcelona, Spain | Undisclosed
58. Quantum Art
Quantum Art develops trapped-ion quantum computing technology with multi-qubit control.
Trapped Ion | Ness Ziona, Israel | Undisclosed
59. Quantum Source
Quantum Source develops photon generation and entanglement technology for photonic quantum computers.
Photonic | Ness Ziona, Israel | Undisclosed
60. Quantum Transistors
Quantum Transistors develops solid-state quantum processors and photonic interconnect technology.
Spin / Diamond | Tel Aviv, Israel | Undisclosed
61. Fujitsu Quantum
Fujitsu develops superconducting quantum computing systems and hybrid quantum-classical computing technology.
Superconducting | Kawasaki, Japan | Undisclosed
62. SEEQC
SEEQC develops digital superconducting electronics for integrated quantum computing control.
Superconducting | Elmsford, NY, USA | Undisclosed
63. QuantWare
QuantWare supplies superconducting quantum processors and technology for scaling quantum chips.
Superconducting | Delft, Netherlands | Undisclosed
64. Origin Quantum
Origin Quantum develops superconducting quantum computers and supporting software and control systems.
Superconducting | Hefei, China | Undisclosed
65. Maybell Quantum
Maybell develops cryogenic systems and wiring infrastructure for quantum computing.
Enabling Hardware | Denver, CO, USA | Undisclosed
66. Bluefors
Bluefors manufactures dilution refrigerators and measurement infrastructure for quantum technology.
Enabling Hardware | Helsinki, Finland | Undisclosed
67. Oxford Instruments NanoScience
Oxford Instruments NanoScience supplies cryogenic and magnet systems for quantum research.
Enabling Hardware | Abingdon, UK | Undisclosed
68. FormFactor
FormFactor provides cryogenic probing and test systems used in quantum-device development.
Enabling Hardware | Livermore, CA, USA | Undisclosed
69. Kiutra
Kiutra develops magnetic refrigeration systems for low-temperature research and quantum technology.
Enabling Hardware | Munich, Germany | Undisclosed
70. Qedma
Qedma develops software for suppressing and mitigating errors in quantum computations.
Software & Control | Tel Aviv, Israel | Undisclosed
71. QPerfect
QPerfect develops quantum computer simulation tools, including the MIMIQ platform.
Software & Control | Strasbourg, France | Undisclosed
72. Orange Quantum Systems
OrangeQS develops automated characterization and testing equipment for quantum processors.
Enabling Hardware | Delft, Netherlands | Undisclosed
73. Qruise
Qruise develops machine-learning software for quantum device modeling, calibration and control.
Software & Control | Saarbrücken, Germany | Undisclosed
74. Qnami
Qnami develops diamond-based quantum sensing instruments for nanoscale magnetic imaging.
Sensing | Muttenz, Switzerland | Undisclosed
75. Q.ANT
Q.ANT develops photonic processing and quantum sensing technology.
Sensing | Stuttgart, Germany | Undisclosed
76. SBQuantum
SBQuantum develops diamond-based quantum magnetometers for magnetic-field measurement.
Sensing | Sherbrooke, Canada | Undisclosed
77. Nomad Atomics
Nomad Atomics develops cold-atom quantum sensors for gravity and inertial measurement.
Sensing | Melbourne, Australia | Undisclosed
78. AOSense
AOSense develops atom-optic sensors for navigation, timing and gravity measurement.
Sensing | Fremont, CA, USA | Undisclosed
79. Vector Atomic
Vector Atomic develops precision timing and inertial sensing systems based on atomic technology.
Sensing | Pleasanton, CA, USA | Undisclosed
80. Aquark Technologies
Aquark develops compact cold-atom systems for quantum sensing and timing applications.
Sensing | Southampton, UK | Undisclosed
81. Cerca Magnetics
Cerca develops wearable magnetoencephalography systems using optically pumped magnetometers.
Sensing | Nottingham, UK | Undisclosed
82. QuantumDiamonds
QuantumDiamonds develops diamond quantum sensors for magnetic imaging and semiconductor inspection.
Sensing | Munich, Germany | Undisclosed
83. Quside
Quside develops quantum random-number generation technology for computing and security.
Cryptography / PQC | Barcelona, Spain | Undisclosed
84. ID Quantique
ID Quantique supplies quantum key distribution and quantum random-number generation systems.
Communications | Geneva, Switzerland | Undisclosed
85. Toshiba Quantum Technology
Toshiba develops quantum key distribution systems for secure optical communications.
Communications | Cambridge, UK | Undisclosed
86. LuxQuanta
LuxQuanta develops continuous-variable quantum key distribution equipment.
Communications | Castelldefels, Spain | Undisclosed
87. ThinkQuantum
ThinkQuantum develops quantum key distribution and quantum random-number generation systems.
Communications | Sarcedo, Italy | Undisclosed
88. QTI
QTI develops quantum key distribution technology for secure communications networks.
Communications | Florence, Italy | Undisclosed
89. Quantum Xchange
Quantum Xchange provides crypto-agile key delivery technology for quantum-safe networking.
Cryptography / PQC | Bethesda, MD, USA | Undisclosed
90. QuSecure
QuSecure develops software for deploying and managing post-quantum cryptography.
Cryptography / PQC | San Mateo, CA, USA | Undisclosed
91. PQShield
PQShield develops post-quantum cryptography implementations in software and semiconductor IP.
Cryptography / PQC | Oxford, UK | Undisclosed
92. SandboxAQ
SandboxAQ develops AI and quantum-related technology for sensing, simulation and security.
Sensing | Palo Alto, CA, USA | Undisclosed
93. CryptoNext Security
CryptoNext develops post-quantum cryptography software and migration technology.
Cryptography / PQC | Paris, France | Undisclosed
94. Crypto Quantique
Crypto Quantique develops hardware-rooted device security and post-quantum-ready security tools.
Cryptography / PQC | London, UK | Undisclosed
95. Quantropi
Quantropi develops quantum-secure cryptographic technology and key-management systems.
Cryptography / PQC | Ottawa, Canada | Undisclosed
96. ISARA
ISARA develops cryptographic agility and post-quantum migration technology.
Cryptography / PQC | Waterloo, Canada | Undisclosed
97. Quantum Dice
Quantum Dice develops photonic quantum random-number generators for security and computing.
Cryptography / PQC | Oxford, UK | Undisclosed
98. Strangeworks
Strangeworks provides a platform for accessing quantum and other advanced computing resources.
Services | Austin, TX, USA | Undisclosed
99. QCentroid
QCentroid provides software for evaluating and orchestrating quantum computing workloads.
Services | Bilbao, Spain | Undisclosed
100. QURECA
QURECA provides quantum technology training, skills development and business services.
Services | Glasgow, UK | Undisclosed