Startup Decision Toolkit

Division of IBM building superconducting quantum processors and the Qiskit open-source SDK. Operates the largest fleet of cloud-accessible quantum systems and publishes an aggressive hardware roadmap toward 100,000+ qubits.

Google's quantum computing division that developed the Sycamore and Willow processors. Demonstrated quantum error correction breakthroughs and beyond-classical computation milestones.

Formed from the merger of Honeywell Quantum Solutions and Cambridge Quantum. Builds the highest-fidelity trapped-ion quantum computers (H-Series) and develops software for cryptography, chemistry, and QNLP.

Publicly traded trapped-ion quantum computing company offering cloud-accessible systems through major cloud providers. Active in QNLP, quantum ML, and enterprise applications; acquired Oxford Ionics and ID Quantique.

Publicly traded full-stack quantum computing company building superconducting multi-chip processors. Offers cloud access via Rigetti Quantum Cloud Services and the Forest SDK.

Pioneer in quantum annealing with over 5,000 qubits; also developing gate-model systems. Offers the Leap quantum cloud service and hybrid solvers targeting optimization problems in logistics, finance, and manufacturing.

Building a fault-tolerant photonic quantum computer using silicon photonics manufactured at GlobalFoundries. Raised $750M+ and has partnerships with governments of Australia and the US.

Canadian photonic quantum computing company and creator of PennyLane, the leading open-source library for quantum machine learning and quantum differentiable programming. Pursuing fault-tolerant measurement-based quantum computing.

Builds neutral-atom quantum computers capable of operating with hundreds of qubits. Active in quantum error correction research and reservoir computing, backed by Google Quantum AI and SoftBank.

French neutral-atom quantum computing company building programmable quantum processors and simulators. Deployed Saudi Arabia's first quantum computer and partners with major enterprises across energy, logistics, and finance.

Develops gate-based quantum computers using optically-trapped neutral atoms. Demonstrated a 1,225-qubit system and is advancing toward fault-tolerant quantum computing from facilities in Berkeley and Boulder.

European superconducting quantum computer manufacturer providing systems to national HPC centers in Finland, Germany, and Spain. Offers IQM Radiance (up to 150 qubits) and cloud access via IQM Resonance.

UK-based photonic quantum computing company building fiber-based quantum processors using quantum memory technology. Partners with the UK Ministry of Defence and targets near-term ML acceleration.

Builds the OPX quantum control and orchestration platform used by over 50% of quantum computer developers worldwide. Raised $170M Series C in 2025 to scale control infrastructure for 10,000+ qubit systems.

Develops cold-atom quantum technologies spanning computing, sensing, and networking. Won $11M DoD award for quantum clocks and advances neutral-atom quantum processors with high-fidelity measurements.

Spun out of Alphabet, combines AI and quantum technologies (AQ). Develops Large Quantitative Models for drug discovery, materials science, cybersecurity, and navigation. Raised $300M+ in 2024.

Quantum chemistry and algorithms company developing the Promethium platform for molecular discovery with DFT-based scoring. Serves pharma, chemical, and materials industries with QC Score for drug discovery.

Develops a quantum computing software platform for high-level quantum algorithm design and circuit synthesis. Raised $110M Series C in 2025, the largest quantum software round ever.

Develops quantum-inspired AI software, including CompactifAI for LLM compression (up to 95% reduction) and the Singularity platform for industrial optimization. Raised $215M Series B in 2025; approaching unicorn valuation.

The world leader in quantum error correction, building the Deltaflow QEC stack. Published a three-year roadmap targeting MegaQuOps by 2026. Partners with major quantum hardware manufacturers.

Provides quantum infrastructure software for error suppression, optimization, and performance enhancement. Works with Airbus on quantum-enhanced supply chain optimization and offers Fire Opal for automated error mitigation.

Quantum algorithms company and the only firm partnering with Google, IBM, and Rigetti simultaneously. Market leader in quantum IP with breakthroughs in optimization and materials simulation. XPRIZE finalist.

Swiss quantum technology company offering hybrid quantum-classical solutions across optimization, ML, and cryptography. Develops a full-stack quantum platform with cloud access.

Reemerged in 2025 after Zapata Computing's 2024 shutdown, retaining 50+ patents. Previously built Orquestra platform for quantum-enhanced enterprise AI. Targeting cryptography, pharma, and defense applications.

Vancouver-based quantum software company developing algorithms for optimization, simulation, and ML. Partners with IBM, Fujitsu, and financial institutions including Siam Commercial Bank.

Provides a quantum computing ecosystem platform that aggregates access to multiple quantum hardware providers and simulators. Simplifies quantum development and deployment for enterprises.

French drug discovery company using quantum physics and AI for ultra-precise molecular simulations. Claims highest accuracy in solving Schrodinger's equation for molecular design across major disease targets.

Uses quantum annealing on D-Wave systems for Quantum-Aided Drug Design (QuADD). Demonstrated quantum advantage over generative AI in lead identification, compressing pre-clinical timelines from years to months.

Develops Quantum Cognition Machine Learning (QCML), creating quantum-inspired analytical AI models that outperform traditional methods on high-dimensional structured data. Applications in finance and healthcare.

Builds digital quantum computing systems using single flux quantum (SFQ) chip-based technology. Develops co-designed, application-specific quantum systems for pharma, finance, and energy.

French photonic quantum computing company building single-photon-based quantum processors. Achieved 20,000x acceleration in spin-photon simulations with NVIDIA CUDA-Q. First QPU on OVHcloud platform.

Specializes in crypto-agile and quantum-safe security solutions including agentless cryptographic asset discovery, posture scoring, and post-quantum cryptographic toolkit for embedded systems.

Develops quantum-driven cybersecurity solutions combining quantum physics with cryptography for IoT device security. Creates hardware root-of-trust using quantum tunneling effects.

Builds development tools that enable software developers to write quantum applications without quantum physics expertise. Focuses on making quantum computing accessible to mainstream programmers.

Indian quantum computing and AI company building quantum processors and developing quantum ML solutions for healthcare, materials, and optimization across classical and quantum platforms.

VC-backed startup developing utility-scale superconducting quantum computers with best-in-class coherence and reliability. Partners with domain experts in fabrication, control electronics, and HPC.

Develops quantum computational fluid dynamics (QCFD) solutions, achieving 100x circuit compression with Classiq and NVIDIA. Raised $5M seed round; targets engineering and aerospace applications.

Applies quantum computing to protein design and drug discovery. Uses quantum-classical hybrid approaches to design novel peptide therapeutics with improved binding properties.

French AI and deep physics drug discovery company using quantum-mechanics-inspired generative AI to invent new drugs at scale. Combines statistical mechanics with deep learning for molecular design.

Publicly traded company offering photonic quantum optimization solutions via its Dirac entropy quantum computing platform. Targets optimization across logistics, finance, and image processing.

UK quantum computing company building superconducting processors with proprietary Coaxmon qubit technology. Offers quantum computing as a service and partners with enterprise clients across sectors.

Develops Covalent, an open-source workflow orchestration platform for quantum and high-performance computing. Enables researchers to manage hybrid quantum-classical workflows across distributed resources.

Singapore-based quantum software startup developing variational quantum algorithms and quantum ML tools for near-term quantum devices. Focuses on QAOA, VQE, and quantum kernel methods.

Japanese quantum software company developing algorithms for quantum chemistry simulation and materials design. Builds tools for variational quantum eigensolvers and quantum-classical hybrid methods.

Develops quantum-classical hybrid solutions for image recognition, signal processing, and computer vision using parameterized quantum circuits and quantum convolutional networks.

Post-quantum cybersecurity company offering cryptographic vulnerability assessments and PQC migration services. Tests on IBM, AWS, Azure, and Google quantum hardware. SOC 2 compliant.

Develops quantum-enhanced deep learning architectures that integrate superposition, entanglement, and quantum search algorithms to overcome limitations in classical AI reasoning capabilities.

French deep-tech startup developing silicon-based quantum processors leveraging semiconductor fabrication expertise. Partnered with SEALSQ on secure quantum semiconductor architectures.

Provides a cloud platform and SDK for accessing quantum hardware and simulators from multiple providers. Offers educational tools and a unified development environment for quantum computing research.