Quantum Computing Startups

Post-Quantum develops quantum-safe cryptographic solutions and standards for protecting sensitive communications and critical infrastructure against quantum computing threats. The company serves government, defense, and enterprise organizations worldwide with production-ready technologies used in NATO communications and critical infrastructure protection.

3 investors

Q*Bird develops quantum key distribution (QKD) devices and networks for secure data communication using quantum technology, serving commercial and industrial clients including financial institutions, telecommunications companies, and data centers. The company is building quantum-secured communication infrastructure for enterprise networks and enabling quantum connectivity for future quantum internet applications.

3 investors

QBraid provides a unified platform for building and deploying quantum computing programs with integrated AI tools for developers. The platform makes quantum computing more accessible to learners, developers, and hardware/software companies across the fragmented quantum computing landscape.

3 investors

QC82 is a quantum computing company building room-temperature photonic quantum computers based on its own photonic chip designs and photodetection technology. The systems are aimed at large-scale simulations in chemistry and materials science.

3 investors

Qendra develops control systems for trapped ion and neutral atom quantum computers. The company provides hardware and software infrastructure to enable quantum computing companies and research groups to focus on quantum computing development rather than control system engineering.

3 investors

Qnami develops quantum microscopy platforms, diamond quantum sensors, and analysis software based on diamond nitrogen-vacancy (NV) center technology for nanoscale magnetic imaging and quantum sensing. Its instruments serve researchers in materials science, spintronics, semiconductor development, and quantum technologies.

3 investors

Quandela develops hardware, middleware, and software for full-stack photonic quantum computing systems designed for industrial applications in energy, cybersecurity, and finance. The company offers modular, scalable, and energy-efficient quantum computers accessible via cloud and on-premise deployment.

3 investors

Quanfluence develops quantum computing systems, including a photonic quantum computer and a coherent Ising machine platform aimed at optimization applications. The company is based in India and focuses on advancing deep-tech and quantum technologies.

3 investors

Quanscient provides a cloud-based multiphysics simulation platform designed for engineers in R&D to accelerate complex engineering simulations with reduced runtimes and improved design exploration across medical devices, consumer electronics, automotive, and space applications.

3 investors

A quantum photonics venture associated with research on integrated quantum photonics and diamond nanophotonics. Its work spans fundamental and applied research led by an academic team affiliated with Humboldt University Berlin and the Ferdinand-Braun Institute.

3 investors

Quantum Qool develops patented ultrafast laser surface structuring technology that enhances material thermal properties for aerospace, defense, and power electronics applications. The company manufactures the Q2 Laser Station, an ultrashort pulse laser system that increases surface emissivity and heat dissipation capabilities in metals and ceramics by up to 10 times for thermal radiators, leading edges, nose cones, and electronic enclosures.

3 investors

QSi (Quantum Silicon) develops atomic-scale silicon quantum chips that perform "field controlled computing" by rearranging electrons within single-atom silicon quantum dots instead of using transistors. Its all-silicon quantum accelerator chips operate at room temperature, are compatible with existing CMOS architectures, and are aimed at low-power, high-speed computing.

3 investors

Qubic develops quantum hardware designed to improve RF sensing and quantum information systems by addressing signal quality, measurement sensitivity, and thermal constraints.

3 investors

Qubit Pharmaceuticals develops novel drug candidates using quantum physics, AI, and computational chemistry through its ATLAS platform for high-precision molecular simulation, modeling, and molecule generation. Its pipeline focuses on oncology, inflammation, and antiviral/pandemic-response programs, with fully owned and partnered drug discovery projects.

3 investors

Qubitcore develops fault-tolerant universal quantum computers using proprietary ion trap technology integrated with optical microcavities to build scalable quantum processor networks connected via optical links. The company, based on research from the Okinawa Institute of Science and Technology (OIST), focuses on distributed ion-trap quantum computing systems.

3 investors

QuintessenceLabs builds quantum cybersecurity products, including key and policy management, crypto-agility tooling, quantum key distribution, and quantum random number generation to help enterprises adopt post-quantum resistant encryption. Its offerings serve organizations seeking to protect data and keys against quantum-computing threats across their infrastructure.

3 investors

Qunnect develops room-temperature hardware for building scalable quantum networks over existing telecommunications infrastructure. The company operates in the quantum networking and deep-tech hardware space.

3 investors

Random Power develops true random number generators derived from silicon detector technology originally created for particle physics research at CERN. The company serves applications requiring high-quality random number generation, drawing on expertise from decades of detector development for fundamental science.

3 investors

Rhea develops SPARROW, an autonomous navigation system for air, land, and sea vehicles that operates independently of GPS in denied environments using computational algorithms and optical sensors. The system provides position, navigation, and timing for military and mission-critical applications in GPS-denied or contested battlespaces.

3 investors

Rhonexum works on quantum computing technology, focusing on the technical challenges of controlling qubits that must be kept in cryogenic refrigerators far colder than room temperature.

3 investors

SemiQon designs and fabricates semiconductor-based quantum processing units (chips) intended to make quantum computers more compact and affordable. The company focuses on chip design, fabrication, and measurement, drawing on quantum and microelectronics research within the European and global quantum industry.

3 investors

SpeQtral develops quantum key distribution technology for secure communications, offering both satellite-based and fiber-optic terrestrial solutions to protect critical infrastructure against quantum computing threats. The company serves telecommunications providers, governments, healthcare, and financial institutions seeking quantum-safe networks.

3 investors

Vault12 offers a non-custodial mobile app, Vault12 Guard, that lets cryptocurrency owners back up their wallet seed phrases and private keys and pass them to designated heirs for crypto inheritance. It uses quantum-resistant cryptography and a decentralized peer-to-peer network of trusted Guardians rather than cloud storage, working across blockchains including Bitcoin, Ethereum, and Solana.

3 investors

Welinq develops quantum networking infrastructure that connects multiple quantum computers into distributed systems, enabling scalable quantum computation through entanglement routing, qubit-photon interfaces, and distributed quantum error correction across heterogeneous quantum hardware platforms.

3 investors