| AdargaCompanies | Makes AI software that searches and summarises large volumes of documents and data for armed forces and security agencies. | Chandlers Ford, Hampshire (SO53 3TG) | Companies House · businesswire.com/news/home/20250113244361/en/Ada · adsgroup.org.uk/knowledge/industry-member-news/a · find-and-update.company-information.service.gov. | verified |
| AgonCompanies | Builds a simulated battle arena in which AI systems for autonomous weapons are trained against adaptive opponents. | | uktech.news/defence-tech/agon-raises-22-5m-to-bu · uktech.news/funding/uk-tech-funding-roundup-this | one source |
| AmorphiQCompanies | Uses AI with a quantum dynamic engine to analyse contested electromagnetic environments; NATO DIANA 2026 cohort. | | diana.nato.int/about-diana/2026-cohort-of-compan | one source |
| AronditeCompanies | Makes AI software that links drones, ground robots and sensors from different makers so one operator can control them together. | London (W1W 5PF) | Companies House · adsgroup.org.uk/knowledge/industry-member-news/a · uktech.news/ai/arondite-ai-defence-startup-from- · find-and-update.company-information.service.gov. | verified |
| AugurCompanies | Makes AI that watches existing security cameras and sensors at busy sites and flags unusual behaviour, without facial recognition. | London | uktech.news/ai/augur-ai-security-funding-round-2 | one source |
| DATAMBIT LimitedCompanies | AI deepfake detection to protect operational integrity and decision-making; NATO DIANA 2026 cohort (data-assisted decision making). | | diana.nato.int/about-diana/2026-cohort-of-compan | one source |
| HadeanCompanies | Builds AI and spatial-computing simulations that armed forces and governments use to train for and plan operations. | London (EC2A 2AP) | Companies House · uktech.news/defence-tech/ai-conflict-simulation- · find-and-update.company-information.service.gov. · find-and-update.company-information.service.gov. · diana.nato.int/connect/nato-diana-selects-innova | verified |
| Helsing UKCompanies | British arm of the defence AI company Helsing; builds AI-enabled underwater drones at a factory near Plymouth. | Plymouth (factory); London (registered office W1T 3BL) | Companies House · helsing.ai/newsroom/helsing-opens-its-first-uk-r · ukdefencejournal.org.uk/helsing-to-build-drone-s · find-and-update.company-information.service.gov. | verified |
| JET ConnectivityCompanies | Builds a sovereign, AI-driven 5G mesh network for contested or denied environments; NATO DIANA 2026 cohort and Mission Track selection. | | diana.nato.int/connect/nato-diana-announces-five · diana.nato.int/about-diana/2026-cohort-of-compan | one source |
| Mind FoundryCompanies | Oxford AI company named as a partner in UK–Ukraine defence AI pilots (its own work not described on pages opened). | Oxford | Companies House · uktech.news/government-policy/uk-and-ukraine-sig · find-and-update.company-information.service.gov. · uktech.news/news/this-oxford-university-startup- | verified |
| Mutable TacticsCompanies | Makes AI software that lets one operator supervise mixed fleets of drones working as a team. | London (EC2A 4NE) | Companies House · uktech.news/defence-tech/drone-defence-startup-s · find-and-update.company-information.service.gov. · find-and-update.company-information.service.gov. · nssif.gov.uk/investment/portfolio | verified |
| Neuron InnovationsCompanies | Secure edge infrastructure for autonomous communication and AI coordination; NATO DIANA 2026 cohort (advanced communications). | | diana.nato.int/about-diana/2026-cohort-of-compan | one source |
| OccamCompanies | UK defence start-up writing autonomy software so drones can fly missions without GPS or constant human control. | | Companies House · uktech.news/defence-tech/occam-ai-drone-ukraine- · find-and-update.company-information.service.gov. · find-and-update.company-information.service.gov. | verified |
| Online OceansCompanies | Christchurch company building uncrewed surface boats and fleet software for naval and maritime-security patrols. | Christchurch | Companies House · uktech.news/defence-tech/online-oceans-raises-4m · find-and-update.company-information.service.gov. · find-and-update.company-information.service.gov. | verified |
| RowdenCompanies | Designs and builds sensing and information systems for the armed forces and emergency services, including AI for submarine acoustics. | Patchway, Bristol (BS34 6FE) | Companies House · nationalwealthfund.org.uk/news-and-publications/ · uktech.news/defence-tech/defence-tech-firm-rowde · bairdmaritime.com/security/naval/unmanned-naval- · find-and-update.company-information.service.gov. | verified |
| SenseOnCompanies | Cyber-security software that uses AI to watch a company's devices and network together and flag attacks. | London (registered office) (SW1Y 4JU) | Companies House · techcrunch.com/2019/02/19/senseon-raises-6-4m-to · techcrunch.com/tag/darktrace/ · find-and-update.company-information.service.gov. | verified |
| SintelaCompanies | Bristol company named as a partner in UK–Ukraine defence AI pilots (its own work not described on pages opened). | Pill, Bristol (BS20 0DH) | Companies House · uktech.news/government-policy/uk-and-ukraine-sig · find-and-update.company-information.service.gov. | verified |
| SkyralCompanies | London company, with a defence subsidiary, named as a partner in UK–Ukraine defence AI pilots (its own work not described on pages opened). | London (EC2A 1AL) | Companies House · uktech.news/government-policy/uk-and-ukraine-sig · find-and-update.company-information.service.gov. · find-and-update.company-information.service.gov. | verified |
| SpaceAMCompanies | Makes very light autonomous sensing systems, combining its own hardware, software and AI, for harsh and contested environments. | Stonehouse, Gloucestershire (GL10 3RF) | Companies House · uktech.news/defence-tech/foresight-group-backs-u · find-and-update.company-information.service.gov. · find-and-update.company-information.service.gov. | verified |
| SpacefluxCompanies | Tracks satellites and space debris for governments and companies, using an AI platform with optical telescopes on five continents. | London (N1 2HY) | Companies House · uktech.news/space-tech/space-intelligence-group- · find-and-update.company-information.service.gov. · find-and-update.company-information.service.gov. · diana.nato.int/about-diana/2026-cohort-of-compan | one source |
| StirlingXCompanies | Builds a data and autonomy platform that helps defence and critical-infrastructure organisations collect and act on mission data. | London (EC2A 4NE) | Companies House · uktech.news/funding/uk-tech-funding-roundup-gaus · find-and-update.company-information.service.gov. · find-and-update.company-information.service.gov. | verified |
| ValarianCompanies | A control layer that governs AI-driven systems and high-consequence operations for enterprises and governments. | London (WC1V 7AA) | Companies House · uktech.news/ai/ai-infrastructure-firm-valarian-r · find-and-update.company-information.service.gov. · find-and-update.company-information.service.gov. | verified |
| VizgardCompanies | Makes AI that automates vision tasks on camera systems used in defence and public safety. | London | Companies House · uktech.news/funding/uk-tech-funding-roundup-this · find-and-update.company-information.service.gov. · find-and-update.company-information.service.gov. · diana.nato.int/about-diana/2026-cohort-of-compan | verified |
| WhitespaceCompanies | Belfast company whose software lets defence and security bodies build, run and govern AI on cloud, edge and air-gapped systems. | Linenhall Street, Belfast (BT2 8BG) | Companies House · uktech.news/ai/belfast-sovereign-ai-firm-raises- · irishnews.com/news/business/belfast-ai-firm-secu · irishnews.com/news/business/belfast-based-ai-com · find-and-update.company-information.service.gov. | verified |
| WhitespaceCompanies | Belfast company selling an AI operating system that defence and national-security bodies run on their own systems. | Belfast (BT2 8BG) | Companies House · uktech.news/ai/belfast-sovereign-ai-firm-raises- · find-and-update.company-information.service.gov. · find-and-update.company-information.service.gov. | verified |