{"id":34325,"date":"2025-12-12T13:08:54","date_gmt":"2025-12-12T13:08:54","guid":{"rendered":"https:\/\/beststartup.co.uk\/?p=34325"},"modified":"2025-12-12T13:15:11","modified_gmt":"2025-12-12T13:15:11","slug":"top-10-quantum-computing-startups-in-uk","status":"publish","type":"post","link":"https:\/\/beststartup.co.uk\/top-10-quantum-computing-startups-in-uk\/","title":{"rendered":"Top 10 Quantum Computing Startups in United Kingdom to Watch in 2025"},"content":{"rendered":"\n<p>Quantum computing startups in the United Kingdom are leading one of the most significant technological revolutions of our time. Seedtable data shows that a core group of UK quantum startups have raised over $328.7 million in aggregate funding, with the broader ecosystem boosted further by large late-stage rounds at companies like Quantinuum, Quantum Motion, and ORCA Computing.<\/p>\n\n\n\n<p>The UK quantum ecosystem spans hardware, software, cybersecurity, and networking infrastructure. From Cambridge research labs to London deep-tech hubs, these ten quantum computing startups \u2013 and scaleups \u2013 are the ones to watch in 2025.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" data-expand=\"600\" src=\"data:image\/svg+xml;charset=utf-8,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' viewBox%3D'0 0 1 1'%2F%3E\" data-src=\"https:\/\/beststartup.co.uk\/wp-content\/uploads\/2025\/12\/image-9-1024x768.png\" alt=\"Quantum Computing Startups in United Kingdom\" class=\"lazyload wp-image-34329\"\/><\/figure>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li><a href=\"#1-quantinuum--the-uks-quantum-champion\">1. Quantinuum \u2013 The UK\u2019s Quantum Champion<\/a><\/li><li><a href=\"#2-oxford-quantum-circuits--compute-as-a-service-pi\">2. Oxford Quantum Circuits \u2013 Compute-as-a-Service Pioneer<\/a><\/li><li><a href=\"#3-nu-quantum--record-breaking-network-innovator\">3. Nu Quantum \u2013 Record-Breaking Network Innovator<\/a><\/li><li><a href=\"#4-post-quantum--cryptography-defenders\">4. Post-Quantum \u2013 Cryptography Defenders<\/a><\/li><li><a href=\"#5-crypto-quantique--quantum-cybersecurity-speciali\">5. Crypto Quantique \u2013 Quantum Cybersecurity Specialists<\/a><\/li><li><a href=\"#6-crypta-labs--iot-security-leaders\">6. Crypta Labs \u2013 IoT Security Leaders<\/a><\/li><li><a href=\"#7-rahko--quantum-discovery-platform\">7. Rahko \u2013 Quantum Discovery Platform<\/a><\/li><li><a href=\"#8-phasecraft--algorithm-experts\">8. Phasecraft \u2013 Algorithm Experts<\/a><\/li><li><a href=\"#9-orca-computing--photonic-quantum-systems-for-ai\">9. ORCA Computing \u2013 Photonic Quantum Systems for AI<\/a><\/li><li><a href=\"#10-quantum-motion--silicon-based-quantum-chips\">10. Quantum Motion \u2013 Silicon-Based Quantum Chips<\/a><ul><li><a href=\"#ready-to-explore-the-u-ks-next-wave-of-breakthrough-startups\">Ready to Explore the UK\u2019s Next Wave of Breakthrough Startups?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"1-quantinuum--the-uks-quantum-champion\">1. Quantinuum \u2013 The UK\u2019s Quantum Champion<\/h2>\n\n\n\n<p>Website:&nbsp;<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.quantinuum.com\/\">https:\/\/www.quantinuum.com<\/a><a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.quantinuum.com\/\"><\/a>\u200b<\/p>\n\n\n\n<p>Quantinuum is the UK\u2019s flagship quantum computing company, formed by merging Cambridge Quantum and Honeywell Quantum Solutions in 2021. In 2025, Honeywell and Fidelity led a $600 million capital raise that valued Quantinuum at around $10 billion, making it one of the most valuable quantum companies globally.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/en.wikipedia.org\/wiki\/Quantinuum\"><\/a>\u200b<\/p>\n\n\n\n<p>The company develops trapped-ion quantum computers and a full software stack for chemistry, materials, cybersecurity, and quantum AI, and has been selected by DARPA to advance a major quantum benchmarking programme.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/learn.microsoft.com\/en-us\/azure\/quantum\/provider-quantinuum\"><\/a>\u200b<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"2-oxford-quantum-circuits--compute-as-a-service-pi\">2. Oxford Quantum Circuits \u2013 Compute-as-a-Service Pioneer<\/h2>\n\n\n\n<p>Website:&nbsp;<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/oqc.tech\/\">https:\/\/oqc.tech<\/a>&nbsp;or&nbsp;<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"http:\/\/oxfordquantumcircuits.com\/\">http:\/\/oxfordquantumcircuits.com<\/a><a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/oqc.tech\/\"><\/a>\u200b<\/p>\n\n\n\n<p>Oxford Quantum Circuits (OQC) is a leading UK quantum hardware company delivering quantum-compute-as-a-service via cloud platforms and data centres. Founded in 2017 by Oxford physicist Peter Leek, OQC uses a patented 3D \u201cCoaxmon\u201d superconducting architecture designed for scale and reliability.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.oxfordinvestmentconsultants.com\/portfolio\/oxford-quantum-circuits-oxford-investment-consultants\/\"><\/a>\u200b<\/p>\n\n\n\n<p>With around $150 million raised, OQC offers enterprise-ready quantum systems through the cloud and colocated deployments, targeting finance, national security, pharma, and advanced materials.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/oqc.tech\/\"><\/a>\u200b<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"3-nu-quantum--record-breaking-network-innovator\">3. Nu Quantum \u2013 Record-Breaking Network Innovator<\/h2>\n\n\n\n<p>Website:&nbsp;<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.nu-quantum.com\/\">https:\/\/www.nu-quantum.com<\/a><a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.nu-quantum.com\/\"><\/a>\u200b<\/p>\n\n\n\n<p>Nu Quantum is building quantum networking hardware to connect quantum processors into distributed, large-scale systems. Spun out of the University of Cambridge\u2019s Cavendish Laboratory in 2018, the company focuses on entanglement distribution, optical switching, and quantum networking units to create multi-node quantum computers.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.nu-quantum.com\/about\"><\/a>\u200b<\/p>\n\n\n\n<p>In December 2025, Nu Quantum closed a landmark $60 million Series A round led by National Grid, the largest known financing for a quantum computer networking startup, cementing its role at the heart of the future quantum internet.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.siliconrepublic.com\/start-ups\/nu-quantum-funding-infrastructure-entanglement-uk\"><\/a>\u200b<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"4-post-quantum--cryptography-defenders\">4. Post-Quantum \u2013 Cryptography Defenders<\/h2>\n\n\n\n<p>Website:&nbsp;<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/post-quantum.com\/\">https:\/\/post-quantum.com<\/a><a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/post-quantum.com\/index.html\"><\/a>\u200b<\/p>\n\n\n\n<p>Post-Quantum develops quantum-resistant encryption and signature schemes designed to protect data and identities from future large-scale quantum computers. Headquartered in London, the company has raised about $11.2 million across four funding rounds to secure financial services, government systems, and blockchain environments against quantum attacks.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/post-quantum.com\/index.html\"><\/a>\u200b<\/p>\n\n\n\n<p>Its technology includes quantum-safe key exchange and digital signatures suitable for high-assurance applications, positioning Post-Quantum as a key UK player in the post\u2011quantum cryptography race.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.startus-insights.com\/innovators-guide\/post-quantum-cryptography-companies\/\"><\/a>\u200b<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"5-crypto-quantique--quantum-cybersecurity-speciali\">5. Crypto Quantique \u2013 Quantum Cybersecurity Specialists<\/h2>\n\n\n\n<p>Website:&nbsp;<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.cryptoquantique.com\/\">https:\/\/www.cryptoquantique.com<\/a>&nbsp;(company site referenced from Seedtable profile)<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.seedtable.com\/\"><\/a>\u200b<\/p>\n\n\n\n<p>Crypto Quantique is a London\/Surrey-based quantum cybersecurity company that uses quantum effects in silicon to generate unclonable device identities and secure IoT deployments. With $8 million raised over two rounds, its technology provides a hardware root of trust that remains robust even in a post\u2011quantum world.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.seedtable.com\/\"><\/a>\u200b<\/p>\n\n\n\n<p>The company targets industrial, automotive, and enterprise IoT markets, allowing devices to authenticate securely without relying on vulnerable, purely software-based keys.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.seedtable.com\/\"><\/a>\u200b<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"6-crypta-labs--iot-security-leaders\">6. Crypta Labs \u2013 IoT Security Leaders<\/h2>\n\n\n\n<p>Website:&nbsp;<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.cryptalabs.com\/\">https:\/\/www.cryptalabs.com<\/a>&nbsp;(industry listings reference this domain; Seedtable lists the startup and team)<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.seedtable.com\/\"><\/a>\u200b<\/p>\n\n\n\n<p>Crypta Labs is a quantum security startup developing a Quantum Random Number Generator (QRNG) and integrated security chip for mobile and IoT devices. The company has raised $4.7 million across three funding rounds and focuses on sectors such as transport, defence, and healthcare where strong randomness is essential for cryptography.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.seedtable.com\/\"><\/a>\u200b<\/p>\n\n\n\n<p>By using quantum processes to generate truly random numbers, Crypta Labs improves the strength of encryption keys and makes it harder for attackers to predict or brute\u2011force secure communications.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.seedtable.com\/\"><\/a>\u200b<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"7-rahko--quantum-discovery-platform\">7. Rahko \u2013 Quantum Discovery Platform<\/h2>\n\n\n\n<p>Website:&nbsp;<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/rahko.ai\/\">https:\/\/rahko.ai<\/a>&nbsp;(domain widely associated with the company; Seedtable lists Rahko and its founders)<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/thequantuminsider.com\/2021\/02\/11\/london-calling-7-qc-startups-based-in-the-uk-capital\/\"><\/a>\u200b<\/p>\n\n\n\n<p>Rahko is building a quantum discovery platform for chemical simulations, combining quantum algorithms and machine learning to accelerate R&amp;D in materials and drug discovery. The London\u2011based startup has raised about $1.6 million and partners with major technology providers to test near\u2011term quantum advantage on realistic chemistry workloads.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/thequantuminsider.com\/2021\/02\/11\/london-calling-7-qc-startups-based-in-the-uk-capital\/\"><\/a>\u200b<\/p>\n\n\n\n<p>Its tools aim to model complex molecules more efficiently than classical methods, opening paths to new pharmaceuticals, catalysts, and advanced materials.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/thequantuminsider.com\/2021\/02\/11\/london-calling-7-qc-startups-based-in-the-uk-capital\/\"><\/a>\u200b<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"8-phasecraft--algorithm-experts\">8. Phasecraft \u2013 Algorithm Experts<\/h2>\n\n\n\n<p>Website:&nbsp;<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/phasecraft.io\/\">https:\/\/phasecraft.io<\/a>&nbsp;(official site used in UK quantum company directories)<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/thequantuminsider.com\/2021\/02\/11\/london-calling-7-qc-startups-based-in-the-uk-capital\/\"><\/a>\u200b<\/p>\n\n\n\n<p>Phasecraft focuses on quantum algorithms and error\u2011optimised techniques for today\u2019s noisy intermediate\u2011scale quantum (NISQ) devices. Spun out of UCL, Bristol, and Bath in 2019, the company has raised about \u00a38.2 million to work on algorithms for materials, condensed\u2011matter physics, and optimization problems.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/thequantuminsider.com\/2021\/02\/11\/london-calling-7-qc-startups-based-in-the-uk-capital\/\"><\/a>\u200b<\/p>\n\n\n\n<p>By improving algorithms rather than just hardware, Phasecraft aims to unlock practical value from relatively small quantum processors years before fully fault\u2011tolerant machines arrive.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/thequantuminsider.com\/2021\/02\/11\/london-calling-7-qc-startups-based-in-the-uk-capital\/\"><\/a>\u200b<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"9-orca-computing--photonic-quantum-systems-for-ai\">9. ORCA Computing \u2013 Photonic Quantum Systems for AI<\/h2>\n\n\n\n<p>Website:&nbsp;<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/orcacomputing.com\/\">https:\/\/orcacomputing.com<\/a><a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/orcacomputing.com\/\"><\/a>\u200b<\/p>\n\n\n\n<p>ORCA Computing develops full\u2011stack photonic quantum computers built from telecom\u2011grade components and proprietary quantum memories. Founded in 2019 as an Oxford spin\u2011out and headquartered in London, ORCA raised a $15 million Series A and now leads an \u00a311.6 million UK \u201cQuantum Data Centre of the Future\u201d project with partners including BP, BT, Airbus, and the National Quantum Computing Centre.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/orcacomputing.com\/about-us\/\"><\/a>\u200b<\/p>\n\n\n\n<p>Its rack\u2011mounted, air\u2011cooled systems are designed for data\u2011centre environments and target workloads such as generative AI and optimization, integrating with standard Python, PyTorch, and CUDA\u2011Q toolchains.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/orcacomputing.com\/\"><\/a>\u200b<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"10-quantum-motion--silicon-based-quantum-chips\">10. Quantum Motion \u2013 Silicon-Based Quantum Chips<\/h2>\n\n\n\n<p>Website:&nbsp;<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/quantummotion.com\/\">https:\/\/quantummotion.com<\/a><a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/quantummotion.com\/\"><\/a>\u200b<\/p>\n\n\n\n<p>Quantum Motion is a London\u2011based startup building silicon\u2011based quantum processors using CMOS\u2011compatible manufacturing processes. Founded in 2017, the company has raised more than \u00a362 million, including a \u00a342 million investment round led by Bosch Ventures to accelerate development of scalable silicon qubit arrays.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/quantummotion.tech\/quantum-motion-raises-42-million-investment-round\/\"><\/a>\u200b<\/p>\n\n\n\n<p>By leveraging the same technology and fabrication methods used in conventional semiconductor chips, Quantum Motion aims to pack large numbers of qubits into compact devices and integrate quantum processors into established silicon supply chains.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/uk.linkedin.com\/company\/quantum-motion-tech\"><\/a>\u200b<\/p>\n\n\n\n<p>The outlook for 2026 is even more futuristic, with the UK shifting from experimental pilots to integrated national quantum infrastructure. Government roadmaps now tie quantum systems directly into a \u00a32 billion compute strategy, long\u2011term NQCC funding, and AI Growth Zones, signalling that British quantum hardware and software will sit alongside GPUs and supercomputers rather than in separate labs.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.gov.uk\/government\/publications\/uk-compute-roadmap\/uk-compute-roadmap\"><\/a>\u200b<\/p>\n\n\n\n<p>By 2026, leading UK startups like Quantinuum, Nu Quantum, ORCA Computing, and Quantum Motion are expected to move closer to real quantum advantage in chemistry, AI, networking, and security supported by new public investments of at least \u00a3121 million and dedicated programmes to turn prototypes into production\u2011grade platforms. For founders, investors, and enterprises, 2026 will be the year to treat UK quantum not as a distant bet, but as a strategic capability to build into products, data centres, and national infrastructure.<a href=\"https:\/\/www.quantinuum.com\/press-releases\/quantinuum-unveils-accelerated-roadmap-to-achieve-universal-fault-tolerant-quantum-computing-by-2030\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"ready-to-explore-the-u-ks-next-wave-of-breakthrough-startups\"><strong>Ready to Explore the UK\u2019s Next Wave of Breakthrough Startups?<\/strong><\/h3>\n\n\n\n<p>Unlock deeper insights, investor intelligence, and in-depth profiles of the UK\u2019s fastest-growing companies.<br><strong>Discover more on BestStartup.co.uk<\/strong>:<br>\ud83d\udc49 <strong><a href=\"https:\/\/beststartup.co.uk\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/beststartup.co.uk\/<\/a><\/strong><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Discover the top 10 quantum computing startups in the UK with detailed insights on founders, funding, technology, and strategic roadmaps for 2026<\/p>\n","protected":false},"author":15,"featured_media":34327,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[491,143,932,213],"tags":[1526,1525],"class_list":["post-34325","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-business-articles","category-england","category-fundraising","category-innovation","tag-quantum-computing-startups-in-united-kingdom","tag-quantum-startups"],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/beststartup.co.uk\/wp-content\/uploads\/2025\/12\/image-8.png?fit=2304%2C1728&ssl=1","wps_subtitle":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/beststartup.co.uk\/wp-json\/wp\/v2\/posts\/34325","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/beststartup.co.uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/beststartup.co.uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/beststartup.co.uk\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/beststartup.co.uk\/wp-json\/wp\/v2\/comments?post=34325"}],"version-history":[{"count":3,"href":"https:\/\/beststartup.co.uk\/wp-json\/wp\/v2\/posts\/34325\/revisions"}],"predecessor-version":[{"id":34332,"href":"https:\/\/beststartup.co.uk\/wp-json\/wp\/v2\/posts\/34325\/revisions\/34332"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/beststartup.co.uk\/wp-json\/wp\/v2\/media\/34327"}],"wp:attachment":[{"href":"https:\/\/beststartup.co.uk\/wp-json\/wp\/v2\/media?parent=34325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/beststartup.co.uk\/wp-json\/wp\/v2\/categories?post=34325"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/beststartup.co.uk\/wp-json\/wp\/v2\/tags?post=34325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}