Quantum Computing Startups
249 companies tagged Quantum Computing, with their investors and founders.
The Algorand Foundation supports and grows the Algorand blockchain ecosystem by improving the developer experience, contributing to core protocol infrastructure and standards, and enabling decentralized governance. It serves developers, builders, and enterprises worldwide through tooling, education, and ecosystem funding.
25 investors
PsiQuantum builds fault-tolerant quantum computers using photonic qubits and semiconductor manufacturing processes. The company develops quantum chips, cryogenic systems, and modular quantum computing platforms for commercial deployment across industries.
24 investors
IBM is a global technology company whose business spans enterprise software (including Red Hat, HashiCorp, and Confluent), IT infrastructure such as mainframes, servers, and storage, and IT consulting services. The company is also investing heavily in quantum computing and AI-based enterprise offerings, including its Lightwell open-source software security clearinghouse and the Anderon quantum wafer foundry.
23 investors
Atom Computing develops large-scale quantum computers using optically-trapped neutral atoms for on-premises deployment. The systems are designed to serve companies and researchers working on computationally intensive applications.
18 investors
Rigetti develops quantum computing hardware and systems, leveraging superconducting quantum processing units cooled by dilution refrigerators to enable advanced quantum computation capabilities.
16 investors
Classiq provides software for designing, optimizing, and executing quantum algorithms across multiple hardware platforms with high-level abstraction and control. The platform serves quantum computing developers and research teams working to scale quantum computing applications.
14 investors
IQM manufactures and sells superconducting quantum computers that institutions can own and operate on-premises, offering products ranging from 5-qubit research systems to 150-qubit high-performance computing systems. The company serves research institutions, high-performance computing centers, and enterprise organizations seeking to develop quantum computing capabilities.
13 investors
SandboxAQ combines artificial intelligence and quantum technology to address complex industrial challenges. The company was spun out from Alphabet in 2022.
13 investors
BlueQubit provides a cloud platform with managed GPU-based and hybrid quantum simulators and an SDK for running large-scale quantum circuits and quantum machine learning algorithms. It serves quantum computing researchers and enterprises in areas such as drug discovery, image processing, and insurance, and integrates with tools like Pennylane and AWS Braket.
11 investors
IonQ builds trapped-ion quantum computing systems along with quantum networking, sensing, and security products, offering commercial systems accessible through major cloud providers and integration with common quantum libraries. It serves enterprise and government customers across applications such as chemistry simulation, materials science, AI model fine-tuning, and quantum-secure communications.
11 investors
Nu Quantum develops quantum networking solutions to enable commercial quantum computer scaling. The company was founded as a spin-out of the University of Cambridge and builds technology for quantum computing utility.
11 investors
Sygaldry develops quantum-accelerated AI servers that combine multiple qubit modalities to speed up training and inference for AI models. The company targets AI companies and researchers seeking more efficient, cost-effective compute infrastructure.
10 investors
Quantinuum develops quantum computers and quantum software solutions for applications in drug discovery, healthcare, materials science, cybersecurity, and energy. The company operates as an integrated quantum technology platform serving enterprise and research customers globally.
9 investors
Quantum Machines builds Hybrid Control systems that integrate quantum control units with classical compute, including the Pulse Processing Unit (PPU) and a development platform based on the QUA language. Its products serve quantum computing developers and researchers working across quantum technologies, with compatibility for stacks such as OpenQASM, Qiskit, and CUDA-Q.
9 investors
SEEQC develops a digital quantum computing platform that integrates the core functions of a quantum computer—including qubits and classical control logic—onto superconducting cryogenic chips, aiming to scale qubits without added complexity. The company targets partners and customers in quantum computing and AI, positioning its architecture for large-scale quantum data centers.
9 investors
Universal Quantum develops quantum computers using trapped ion technology designed to solve complex computational problems in drug design, climate modeling, battery chemistry, and other fields. The company builds devices intended to operate reliably and deliver practical utility at scale.
9 investors
Infleqtion develops quantum-enabled hardware and AI-powered products for positioning, navigation, and timing (PNT), including optical atomic clocks, quantum sensing, and quantum computing, serving commercial organizations and government/defense customers. Its UK subsidiary conducts research and manufacturing of quantum subsystems such as cold atom sources, atomic vapor cells, and photonic frequency combs.
8 investors
Pasqal is a quantum computing company that develops high-performance quantum systems using neutral atom technology and software for optimization, simulation, and artificial intelligence applications across industry, science, and government sectors. The company serves clients including major corporations and technology partners worldwide.
8 investors
Q-CTRL builds AI-powered control software for quantum computing systems, enabling manipulation and optimization of quantum computers without destroying quantum states. The technology serves quantum computing researchers and organizations developing next-generation quantum systems.
8 investors
Conductor develops AI algorithms and control software for quantum computing, helping researchers and engineers optimize qubit architectures and scaling in semiconductor-based quantum systems.
7 investors
Quantum Brilliance designs and manufactures diamond-based quantum chips and products that operate at room temperature, targeting deployment across data centers, edge computing, and field applications. The company provides compact, robust quantum devices integrated with existing sensing and computing infrastructure.
7 investors
Quantum Circuits develops superconducting quantum computers using dual-rail qubits with built-in error detection, designed to accelerate the path to fault-tolerant quantum computing. The company targets enterprises and institutions seeking reliable, scalable quantum computing solutions.
7 investors
Zapata Quantum is a publicly traded company (OTCQB: ZPTA) that develops quantum algorithms and applies agentic AI to automate quantum resource estimation workflows. Its work targets quantum chemistry applications, including drug discovery, energy, and advanced materials development.
7 investors
Aliro provides a full-stack software platform for quantum networking, including simulation, orchestration, and operating system solutions that enable enterprises and government agencies to plan and deploy quantum networks for applications like QPU interconnection and quantum-secured communications. The company serves financial services, defense, telecom, and utility customers seeking to operationalize quantum networking infrastructure.
6 investors