Top Quantum Computing companies 2026 — by total raised

#04

Infleqtion

INFQ

Infleqtion develops neutral-atom quantum computers and quantum-enabled products including atomic clocks and RF sensors.

Neutral-Atom Qubits · IPO $550M

#05

IonQ builds trapped-ion quantum computers with industry-leading gate fidelities and offers cloud access through AWS, Azure, and Google Cloud.

Trapped-Ion Qubits · IPO $650M

#06

Rigetti designs and manufactures superconducting quantum processors and operates a full-stack quantum computing platform.

Superconducting Qubits · IPO $458M

Superconducting Qubits

#07

Xanadu builds photonic quantum computers and develops PennyLane, an open-source quantum machine learning framework.

Photonic Qubits · IPO $302M

#08

IQM designs and manufactures superconducting quantum computers for research institutions and data centers.

Superconducting Qubits · Series B $320M

Superconducting Qubits

Series B

$320M

HQ

#09

Oxford Quantum Circuits

Oxford Quantum Circuits builds superconducting quantum computers with proprietary Coaxmon technology and offers cloud access.

Superconducting Qubits · Series C $350M

Superconducting Qubits

#10

Photonic builds silicon-spin quantum computers that integrate qubits with photonic interconnects for networking and scalability.

Silicon-Spin Qubits · Series B $200M

#11

Multiverse Computing provides quantum software solutions for finance, energy, and manufacturing optimization problems.

Quantum Software & Applications · Series B $215M

Quantum Software & Applications

#12

Quantum Machines builds control and orchestration systems for quantum computers, enabling real-time classical-quantum processing.

Control Systems · Series C $170M

#13

QuEra builds neutral-atom quantum computers based on research from Harvard and MIT, focusing on optimization problems.

Neutral-Atom Qubits · Series B $230M

#14

QuantWare manufactures superconducting quantum processors as off-the-shelf components for quantum computing research and development.

Component Suppliers · Series B $178M

#15

Classiq provides a software platform for designing, optimizing, and executing quantum algorithms at scale.

Quantum Software & Applications · Series C $110M

Quantum Software & Applications

#16

Alice & Bob develops cat qubits, a novel superconducting architecture designed to reduce error correction overhead.

Superconducting Qubits · Series B $104.9M

Superconducting Qubits

#17

Pasqal develops neutral-atom quantum processors and targets optimization and simulation applications.

Neutral-Atom Qubits · Series B $108M

#18

Q-CTRL builds quantum control infrastructure software to reduce errors and improve performance across quantum hardware platforms.

Error Correction & Control · Series B $113M

Error Correction & Control

#19

Riverlane develops quantum error correction software and hardware decoders to enable fault-tolerant quantum computing.

Error Correction & Control · Series C $75M

Error Correction & Control

#20

Atom Computing develops neutral-atom quantum computers using optical tweezers to trap and manipulate individual atoms.

Neutral-Atom Qubits · Series B extension $10M

#21

Silicon Quantum Computing

Silicon Quantum Computing develops silicon-based quantum processors using phosphorus donor atoms in silicon.

Silicon-Spin Qubits · Series A $36M

#22

Terra Quantum develops quantum algorithms and hybrid quantum-classical software for optimization, simulation, and cryptography.

Quantum Software & Applications · Series A $75M

Quantum Software & Applications

#23

Quandela manufactures photonic quantum computers and single-photon sources for quantum computing and communication.

Photonic Qubits · Series B $53.5M

#24

SEEQC builds chip-based superconducting quantum computers that move qubit readout, control, and error correction onto cryogenic Single Flux Quantum (SFQ) digital chips co-located with the qubits.

Superconducting Qubits · Growth $30M

Superconducting Qubits

#25

ORCA Computing develops time-bin encoded photonic quantum computers designed for easy integration with existing telecom infrastructure.

Photonic Qubits · Series B $37M