Quantum Computing Startups
249 companies tagged Quantum Computing, with their investors and founders.
1QBit develops computational tools that enable organizations to reimagine and solve complex, previously intractable problems across industries. The company creates next-generation software to help businesses discover new solutions to existing challenges.
3 investors
A UK-based company developing full-stack photonic quantum computers for applications in aerospace, cybersecurity, defence, energy, pharma and AI. The company builds scalable quantum systems using hybrid photonic chips compatible with telecom infrastructure and standard data centre environments.
3 investors
Alice & Bob develops quantum computing hardware based on the cat qubit, a qubit design with built-in error correction, and offers Helium, a testbed for error correction. The company aims to build a universal, fault-tolerant quantum computer for high performance computing applications.
3 investors
Anametric develops chip-scale quantum photonic (QPIC) devices for cybersecurity applications, drawing on semiconductor design expertise and research commercialized through a partnership with Southern Methodist University. The company works with the Air Force Research Lab and Army Research Lab on quantum photonic chip designs and is developing its first generation of quantum photonic products.
3 investors
Amadeus Capital Partners is a UK venture capital firm, founded in 1997, that invests in deep technology companies from seed to growth stage across three areas: Intelligence (AI, advanced computing, quantum), Human (health, medicine, wellness), and Planet (sustainability, energy, materials, space). It has backed more than 200 companies and raised over $1.3 billion for investment.
3 investors
Arqit provides encryption intelligence and quantum-safe security solutions that help organizations identify cryptographic vulnerabilities, manage post-quantum cryptography migration, and protect data against current and future threats including adversarial decryption.
3 investors
Entropica Labs is a quantum computing software company building the infrastructure layer between quantum hardware and applications, with tools for quantum error correction and fault-tolerant computing. It serves hardware teams, researchers, and developers with products to explore, compile, and package fault-tolerant quantum programs.
3 investors
Groove Quantum develops quantum computing chips based on germanium spin qubits, using existing semiconductor manufacturing processes to address the scalability challenge of building large qubit systems. The company focuses on qubit fabrication, operation, and integration, and has demonstrated a 2D grid of semiconductor qubits and operation of a germanium quantum processor.
3 investors
Horizon Quantum builds software infrastructure for quantum computing, including Triple Alpha, an integrated development environment with proprietary programming languages and a compiler that lets developers write portable quantum programs at multiple levels of abstraction. It also provides cloud-based deployment and execution infrastructure so users can run quantum applications on existing hardware, aimed at software developers building quantum applications.
3 investors
Iceberg Quantum designs fault-tolerant quantum computing architectures based on LDPC codes that reduce the hardware overhead for quantum error correction. The company focuses on quantum architecture to make useful quantum computing achievable sooner.
3 investors
Jmem Tek designs ASIC solutions, hardware security IP, and IC design services for quantum-resilient cybersecurity, including NIST-certified post-quantum cryptography and hardware-anchored identity authentication. Operating in the upstream semiconductor industry, it protects chips against counterfeiting, unauthorized access, and quantum-era threats.
3 investors
kiutra builds helium-3-free cryogenic cooling systems (cryostats and cooling platforms) that reach kelvin and millikelvin temperatures, along with cryogenic characterization services. Its products serve research institutions and companies developing quantum technologies, including scalable quantum computing systems.
3 investors
Lightsynq develops optical quantum interconnects using integrated diamond photonic circuits to enable scaling of fault-tolerant quantum computers. The company serves quantum computing system builders seeking solutions to address interconnectivity bottlenecks in large-scale quantum systems.
3 investors
Omni Design Technologies develops high-performance analog-to-digital and digital-to-analog converter IP cores for AI infrastructure, 5G networks, automotive systems, and satellite communications. The company delivers mixed-signal IP solutions optimized for low power consumption and advanced semiconductor process nodes.
3 investors
OptQC develops optical quantum computers aimed at practical societal implementation, addressing energy efficiency and computational capacity limits through a scalable photonic approach to quantum computing.
3 investors
Oratomic builds fault-tolerant quantum computers using ultra-efficient error correction with light and atoms. The company aims to create utility-scale quantum systems for applications in artificial intelligence and scientific discovery.
3 investors
Photonic is building a commercial-scale, fault-tolerant quantum computer using a unique T-centre qubit technology and Entanglement First distributed architecture designed for unlimited scalability. The company serves enterprises, governments, and academia with quantum computing services, systems, and quantum secure networking capabilities.
3 investors
Qnami develops quantum sensing and imaging technology, producing scientific instruments and analytical solutions based on diamond quantum chips, system integration, and data analytics software. Its products serve customers in nanotechnology, life science, and earth science, working with universities and industrial partners worldwide.
3 investors
QuantrolOx develops machine learning software to automatically characterise, tune, and control quantum devices, serving quantum labs, research sites, and quantum computing platforms. The company operates in the quantum technology and deep tech space.
3 investors
Quantum Transistors develops a scalable single-chip quantum processor by combining solid-state natural qubits with photonic interconnects, drawing on semiconductor industry techniques. The company operates its own diamond fabrication facility for R&D and small-scale production of quantum computing hardware.
3 investors
QuantumDiamonds develops quantum sensing systems for non-destructive semiconductor defect inspection and failure analysis, using magnetic current imaging with diamond-based sensors to localize faults such as shorts, opens and leakages in chips. It sells commercially available in-lab tools, is developing in-line wafer mapping systems for yield monitoring, and offers failure analysis as a service to semiconductor makers.
3 investors
Quantum Dice is a University of Oxford spinout working in quantum technology. The page provides only news about the company signing the Equinox Charter, an Oxford-led initiative to strengthen collaboration across research, industry and government.
3 investors
Quantum Systems (QS) develops photonic quantum computing technology based on deterministic generation of photons and entangling gates, aiming to make practical, affordable quantum computers more widely accessible. The company builds on research from the Weizmann Institute of Science and recent advances in photonic technologies.
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