Cybersecurity Solutions

Chaleit

Cambridge-based cyber security consultancy offering penetration testing with aftercare, adversary simulation, red and purple teaming, DevSecOps engineering, AI security, cloud security services, and governance, risk and compliance support. Its advisory work aligns business context with technical capability to solve complex risks. Clients include Meltwater, Lookers, MarTrust and Murdoch University across sectors such as financial services, healthcare, logistics and education.

Channel Host

Channel Host, trading as Cloud4 Technology Ltd, supplies cloud, security and managed IT solutions to managed service providers (MSPs). Its range covers hosted desktop, Cyber Essentials support, managed endpoint detection and response (EDR), Microsoft 365 managed detection and response, and cyber awareness training. Backup services include Xero backup and Microsoft 365 backup. The company has operated since 2009 from Warrington, offering partner pricing and price lists to MSPs alongside expert support. Channel Host is a certified and award-winning provider within the MSP channel.

Chronicle Online

UK time and attendance management system offering biometric, facial recognition, and cloud-based workforce tracking solutions.

Cintoo US Inc.

Cintoo provides a cloud-based platform for reality capture data, enabling users to upload, process, visualize and manage 3D scan datasets from any laser scanner or device. It serves professionals in construction, engineering and facility management by offering tools for BIM integration, digital twin creation, AI-powered classification and immersive VR access to scan data.

Cintra HR

Cloud HR, payroll, and absence management software for UK organisations with BACS-approved payroll and real-time reporting.

Cipher Knights

Cipher Knights is a Leicester-based cybersecurity and IT support company serving UK small businesses. It prepares organisations for Cyber Essentials and Cyber Essentials Plus certification, carries out penetration testing and vulnerability assessments, configures firewalls and VPNs, and provides managed IT helpdesk support. Additional services include Microsoft 365 cloud hardening, business Wi-Fi and LAN/WAN installation, incident response, security posture reviews with UK GDPR guidance, and phishing awareness training.

Citrix UK / Cloud Software Group

Claap

Async video and screen recording platform for sales teams with AI transcription and meeting insights.

ClearShield Cyber

ClearShield Cyber provides cyber security services and software development for small and medium businesses across the United Kingdom. Its Cyber Health Check is a permission-based review of email, passwords, multi-factor authentication, devices, backups and customer data, producing a risk summary and prioritised action plan aligned to National Cyber Security Centre advice. The company also builds secure websites, browser-based web applications and local-first desktop tools with encryption, access control and recovery testing built in.

ClearYolk

ClearYolk provides cyber security and data protection services to organisations in Exeter and across the UK. Its solutions cover advanced threat detection, data integrity controls, audit-ready reporting and backup, supporting compliance with frameworks including NIST, HIPAA, GDPR and cyber insurance requirements. Support is delivered by UK-based staff, with global data centres used to maintain data sovereignty. Clients include schools, trusts and other organisations handling sensitive data.

CloudIBN

CloudIBN provides managed cybersecurity and cloud services, certified to ISO 9001:2015, ISO 20000:2018 and ISO 27001:2022, with more than 26 years of industry experience. Services include 24/7 managed SOC, cloud security, vulnerability assessment and penetration testing, multi-cloud management, identity and access management, and GDPR compliance support. The company holds Solution Partner status with Microsoft and AWS, serving more than 1,200 clients across 10 or more countries. Teams include certified ethical hackers, ISO 27001 auditors, solution architects and cloud security engineers.

CloudPeek

CloudPeek supplies an agentic AI platform for security operations that triages, investigates, hunts and contains threats across an existing security stack. Customers set the level of autonomy and keep their data and models under their own control, running cloud-first, hybrid or fully disconnected. The platform serves defence and national security networks, critical national infrastructure and regulated industries such as financial services. Each alert is enriched, correlated against estate context and prior incidents, then escalated with evidence or closed with a written reason. Access is also available through a Model Context Protocol server.

CloudSEK

CloudSEK provides a graph-based predictive attack path intelligence platform that correlates identities and exposures into attacker kill chains and disrupts them before exploitation. The platform covers digital risk, threat intelligence, external attack surface, AI system security and third-party ecosystem monitoring. AIVigil is CloudSEK's AI attack surface monitoring module that discovers, monitors and secures exposed AI infrastructure, MCP servers, vector databases, agentic workflows and shadow AI assets. More than 1,000 cybersecurity teams use CloudSEK products globally. CloudSEK raised $19 million in a Series B1 round.

CoByEx

CoByEx provides mobile, connectivity and IT solutions to businesses, small and medium-sized enterprises and yachting crews. Its mobile services include UK and international business mobile phone contracts, multi-network UK SIMs and global roaming eSIMs, alongside mobile device management. Connectivity offerings cover business broadband, satellite communications through OneWeb, and 4G and 5G cellular data and IoT connections. The company also supplies IT support packages, Microsoft 365, cyber security solutions for yachts and business VoIP systems, reporting over 17,000 connections worldwide.

Coalfire

Coalfire provides cybersecurity and compliance services, including FedRAMP and CMMC advisory, compliance automation and audit services, and penetration testing. The company runs threat-focused security assessments through its DivisionHex team and holds C3PAO accreditation for CMMC federal assessments. Its advisory practice covers cloud engineering and healthcare risk, and its assessment platform coordinates audits across more than 85 compliance frameworks for enterprise and technology clients.

Coates IT

Coates IT supports small and medium businesses across East and Central Scotland - we offer IT support, managed backups, wifi and telephone systems. Working from home is our speciality.

Cogent Distribution

UK and Ireland private 5G network solution provider deploying secure enterprise wireless for industry.

Cognisys

Cognisys provides cybersecurity consulting, penetration testing and vulnerability management services for businesses working towards ISO 27001 and SOC 2 compliance. The company is based in Leeds and supports organisations in identifying security weaknesses and managing vulnerabilities across their systems. Cognisys structures its consulting work around helping clients meet recognised information security standards rather than providing a single one-off assessment, combining penetration testing with ongoing vulnerability management support for businesses at different stages of their security programme.

Cognitous Cyber Security

Cognitous is a Wigan-based cyber security firm helping organisations protect critical IT infrastructure and customer data. Services include penetration testing, red team engagements, Cyber Essentials certification, secure code review, technical due diligence and incident response. It also runs training courses covering security awareness for IT users, secure development for technical staff and penetration testing for software testers, with focus on developers, small businesses and smart technology.

Collabora

Open source software consultancy providing Linux, kernel development, and embedded systems engineering.

CompTech Solutions

CompTech Solutions designs, engineers, manufactures and tests secure IT solutions that meet government and military security standards. Based in Basingstoke, it specialises in TEMPEST and CEMA engineering, protecting commercial off-the-shelf equipment from eavesdropping via electromagnetic emissions. Serving government, MOD and NATO allied partners, it delivers information assurance through an end-to-end process spanning scoping, production, deployment and ongoing support.

Compass Plus Technologies

Compass Plus Technologies provides issuing, acquiring and digital payment solutions for financial institutions. Its TranzAxis platform is token-based and cloud-native, and provides card issuing, acquiring, fraud management, ATM management and processing services through an API-first architecture. The company supports start-ups and established banks, and has delivered its platform for customers including AccèsBanque Madagascar. Compass Plus Technologies publishes insights on payments processing and hybrid systems for financial institutions moving away from card-centric infrastructure.

Complete I.T.

Complete IT provides managed IT, cybersecurity, data protection, and help desk support services. Serving small to mid-sized businesses in Austin, including healthcare practices, law firms, retail shops, architecture, engineering, construction, and professional service providers, the company manages computing infrastructure, system monitoring, backups, and network solutions.

Comtek System Solutions

Comtek System Solutions provides managed IT services, cloud services and IT security to UK businesses. The company monitors and maintains client networks, aiming to prevent problems before they occur. Its cloud team advises on moving away from on-premise systems towards more flexible cloud infrastructure. Comtek's security services cover device, on-premise and cloud protection, including backup services that add resilience to client data. The company positions itself as a technology partner, working directly with business owners on network security, expansion and streamlining projects.