A quantum computing company with its European headquarters in Cambridge, building trapped-ion quantum computers and the software to run them.
Quantinuum builds quantum computers and the software that runs on them. Its machines, called the H-Series, are trapped-ion computers, which store each qubit (the quantum version of a bit) in a single charged atom and can connect any qubit to any other. It also develops TKET, an open-source tool that translates quantum programs for different machines, InQuanto for computational chemistry, and Quantum Origin, a product that generates cryptographic keys using quantum methods. Its systems are used by researchers and companies who want to explore problems in chemistry, materials, finance and security.
The company was formed in 2021 by combining the quantum hardware team of Honeywell with the software team from Cambridge Quantum Computing, a Cambridge company founded in 2014 by Ilyas Khan through the University of Cambridge's Accelerate Cambridge programme. Its current chief executive is Rajeeb Hazra, and Mr Khan is now chief product officer and vice chair. Its stated mission is 'to accelerate quantum computing and use its power to positively transform the world', with areas named including drug discovery, healthcare, materials science, cybersecurity, energy and climate change. ACQUIRED/MERGED: formed in 2021 from Honeywell Quantum Solutions and Cambridge Quantum; it operates under the Quantinuum name.
In the UK, Quantinuum's European headquarters is in Cambridge, at Terrington House on Hills Road, and the company also has offices in London, in Victoria and St James's, and in Oxford. It has other sites in the United States, Germany and Japan, and added Singapore in 2026. Wikipedia gives a total of about 450 employees, although that is across all locations and we have no UK-only figure.
Its pages we could read described scientists as leaders in the field and an approach that combines software with high-fidelity hardware, which is the company's own description. Because it spans hardware, software and security, its UK teams span a wide mix of skills, from quantum physicists and engineers to software developers, mathematicians and linguists working on quantum language tools.
Quantinuum's UK roots in Cambridge make it a useful example of a university idea growing into an international company. If you like maths, physics, computing, chemistry or languages, there are routes in from several directions. Its own website lists current roles in Cambridge, London and Oxford.
Website: www.quantinuum.com
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