Startups Directory

Quantinuum develops trapped-ion quantum computing hardware and software middleware for enterprise applications in cybersecurity, drug discovery, materials science, and financial modeling. The company operates Helios, the world's most accurate commercial quantum computer with 98 fully connected qubits and 99.9975% single-qubit gate fidelity. Its software products, including InQuanto for quantum chemistry simulations and TKET optimization toolkit, enable organizations to run production quantum applications on Quantinuum's hardware and other quantum platforms.

SandboxAQ develops Large Quantitative Models (LQMs)—physics-aware AI systems that solve complex problems in drug discovery, cybersecurity, and GPS-denied navigation. The company spun out from Alphabet in 2022 with six years of internal R&D and serves Global 1000 enterprises through cloud-delivered software subscriptions. Unlike general-purpose LLMs, SandboxAQ's models incorporate quantitative reasoning for measurable real-world outcomes in regulated, calculation-intensive domains.

Multiverse Computing develops compressed AI models and quantum software that enables enterprises to run large language models 4x-12x faster with 50-80% lower inference costs. Using tensor network mathematics from quantum mechanics, their CompactifAI platform compresses LLMs by up to 95% with minimal precision loss, while their Singularity platform allows organizations to leverage quantum computing for optimization without specialized hardware. Serving over 100 global customers including Iberdrola, Bosch, and the Bank of Canada, they're positioned as Europe's largest quantum software company focused on practical, cost-effective AI and quantum solutions for manufacturing, finance, energy, and defense sectors.

Pasqal develops quantum processing units (QPUs) based on neutral atom technology, where individual atoms trapped by optical tweezers serve as qubits. The company integrates quantum computing into HPC and cloud environments to solve optimization, simulation, and AI workloads for enterprises. Pasqal's neutral atom approach offers coherence times an order of magnitude higher than competing architectures (superconducting qubits, ion traps) and enables flexible 2D/3D atomic arrangements that reduce computational overhead.

Xanadu develops photonic quantum computing hardware and software platforms that operate at room temperature, eliminating the extreme cooling requirements of competing approaches. The company offers Aurora, a 12-qubit universal photonic quantum computer, alongside software tools like Pennylane for quantum programming and Lightning for high-performance simulation. Its continuous-variable encoding approach provides inherently higher tolerance to manufacturing imperfections, enabling faster progress toward quantum advantage. Xanadu serves defense, aerospace, pharmaceutical, semiconductor, and automotive sectors through cloud-based access and direct partnerships.

Infleqtion engineers neutral atom quantum computers, precision atomic clocks, and quantum software for governments, corporations, and research institutions. The company delivers full-stack quantum systems with real-world deployments on the International Space Station and in national labs, achieving record-breaking 99.73% CZ gate fidelity. With $311M in total funding and $32.5M in 2025 revenue, Infleqtion serves defense, aerospace, and commercial customers through products like Sqale quantum computers and Tiqker atomic clock systems.

Quantum Art is a full-stack trapped-ion quantum computing company developing scalable quantum hardware with proprietary multi-core ion chain architecture. The company aims to deliver quantum systems with 100x faster gate speeds, 100x more parallel operations, and 50x smaller footprint compared to competitor roadmaps. Founded as a Weizmann Institute spin-off with deep expertise from Nobel laureate collaborators, Quantum Art targets near-term quantum advantage by 2027 and million-qubit systems by 2033.