Quantum Computing Startups

Quantonation is a venture capital firm investing in early-stage deep-tech companies developing quantum computing, quantum sensing, and related photonic and semiconductor technologies.

2 investors

QLM Technology develops a patented single-diode laser lidar system for continuous, low-cost detection and monitoring of methane and other greenhouse gas emissions. It serves industrial sectors including upstream and downstream gas, refining, wastewater, landfills, and farming.

2 investors

Quantum Xchange develops a cryptographic management platform for securing enterprise networks against current threats and future quantum-computing attacks. It targets organizations needing post-quantum-ready data protection.

2 investors

QuantX develops quantum sensing instruments and precision timing systems for defense, space, and critical infrastructure applications where conventional technology fails. Products include ultra-stable frequency oscillators, compact optical atomic clocks, quantum magnetometers, and synchronization systems for GPS-denied and contested environments.

2 investors

Quip Network is building a worldwide quantum computer with a team of cryptographers, engineers, and operators focused on quantum-resistant cryptography, smart contracts, and distributed systems.

2 investors

Quoherent develops qubits using topological materials that operate at room temperature, aiming to enable portable, mobile quantum computing without extreme cooling. It works in the quantum computing hardware category.

2 investors

QustomDot develops quantum dot synthesis and engineering technology for applications utilizing nanocrystal and ink-based manufacturing processes. The company provides products based on quantum dot surface engineering and inkjet printing capabilities.

2 investors

SandGrain develops CyberRock, a post-quantum-resilient authentication platform designed for aerospace and defense applications in Europe and NATO member states.

2 investors

Scenario X provides AI and quantum-computing analytics for financial institutions, offering modules for adverse scenario modelling, pre-provision net revenue projections, risk assessment, and data consolidation. Its tools support stress testing, regulatory compliance, predictive financial modelling, and risk management for banks, wealth advisors, trading desks, and insurers.

2 investors

Sparrow Quantum develops quantum computing technology, building on research from the Niels Bohr Institute in Copenhagen where the company originated.

2 investors

SQK develops a deep-technology stack combining quantum, AI, and high-performance computing, entering the market through medical imaging workflows before expanding into energy, manufacturing, and research applications. It offers products for pilots, API access, validation services, and enterprise simulation, targeting healthcare, industrial, and scientific environments.

2 investors

Strangeworks provides optimization and quantum computing services, combining embedded PhD-level specialists with a heterogeneous hybrid compute platform and an agent product called Aura to turn complex operational problems into production systems. It serves enterprises and governments in sectors such as aerospace, using classical, quantum-inspired, and quantum resources.

2 investors

Tectonic builds and deploys post-quantum cryptography infrastructure, including NIST-aligned encryption, secure network routing that verifies every hop, and encryption key management across devices and users. It targets defense and enterprise systems that must operate across satellite, radio, tactical edge, and standard IT, including denied and disconnected environments.

2 investors

Vescent develops photonics and quantum hardware, including frequency combs, lasers, controllers, and optical atomic clocks, along with laser stabilization and cold atom science solutions. Its products serve quantum computing, precision metrology and sensing, timing, quantum networking, navigation, defense, and research applications.

2 investors

Vexlum is a spin-off from Tampere University of Technology's Optoelectronics Research Centre that develops VECSEL (vertical-external-cavity surface-emitting laser) technology, including optoelectronic materials, scalable manufacturing processes, and application-specific laser systems. Its work covers new laser wavelengths and quantum technology applications.

2 investors

Xen Quantum develops silicon-photonics-based quantum key distribution (QKD) modules that integrate with existing telecom rack equipment and fibre-optic infrastructure to secure critical networks. Its CMOS-compatible hardware uses discrete-variable QKD to provide encryption keys secured by quantum physics rather than computational assumptions.

2 investors

Quanmatic works on the social implementation and commercialization of advanced technology across enterprise IT, consulting, and autonomous driving fields.

2 investors

A*Quantum provides "AQCloud," a quantum computing–based AI cloud service with applications for vehicle dispatch/delivery routing, sales activity, and workforce shift scheduling. The company works with enterprises and public bodies in Japan on optimization projects such as aircraft maintenance planning for JAL.

2 investors

AbbaTek develops technology for real-time environmental monitoring that combines field data collection, scientific workflows, and analytics to help organizations convert fragmented observations into actionable insights. The platform integrates field sampling, lab validation, QA/QC processes, and reporting for environmental programs at scale.

1 investor

AQT develops quantum computers and quantum algorithms to solve complex problems across industries including aerospace, chemistry, materials science, and finance. The company designs compact, rack-mounted quantum systems optimized for integration into existing high-performance computing infrastructure.

1 investor

Ambature develops quantum computing and superconducting materials and devices for advanced applications. The company combines expertise in nanomaterials, quantum physics, and semiconductor fabrication to create next-generation technology.

1 investor

Anyon Systems builds and delivers superconducting quantum computers designed for practical deployment in high-performance computing environments. The company serves organizations globally seeking to move quantum computing from research into operational use.

1 investor

Applied Quantum Materials designs and manufactures silicon, carbon, and germanium nanomaterials and their chemical precursors for advanced technology applications. The company customizes nanomaterial properties for use in batteries, displays, sensing, photovoltaics, and biological imaging.

1 investor

Archer develops quantum computing, sensing, and diagnostic devices intended to address complex problems in artificial intelligence and healthcare. The company operates in the quantum technology sector with partnerships across research institutions globally.

1 investor