All companies

Cyderes provides managed cybersecurity services including identity, threat detection, and exposure management.

Provides cybersecurity protection and risk management for maritime vessels, offshore facilities and ports.

Cyera provides a data security platform that discovers and protects sensitive data across cloud environments.

CYGNVS provides an out-of-band command center platform for managing cyber and AI incident response.

Cylake provides an AI-native cybersecurity platform for air-gapped sovereign environments.

Cylus provides cybersecurity solutions for railway operators to protect rail operational technology.

Israeli firm selling in-vehicle intrusion detection, vulnerability tools, compliance software and vehicle SOC services to carmakers.

Cymphony provides an AI-native workforce security platform that maps identities, data, and permissions to reduce risk.

Cymulate provides a platform for validating security controls against threats and exposures.

Cyngular provides an agentic security operations centre platform that autonomously detects, investigates and resolves cyber threats.

CREST-accredited Manchester-based cyber security firm delivering penetration testing, managed security services, and compliance consultancy across the UK, Europe, and the USA.

Cyware provides a platform for threat intelligence management, security orchestration, and collective defense.

D3 Security provides an agentic SOC platform that autonomously triages, investigates, and responds to security alerts.

Darktrace provides AI-powered cybersecurity solutions that detect and respond to threats across networks, cloud, email, and AI systems.

Darwinium provides edge-based intent intelligence to prevent digital fraud and abuse across customer journeys.

Dashlane provides credential security and password management for businesses.

Data & More is a Danish software company founded in 2016.

Data Theorem provides application security for mobile, API, cloud, and AI-driven applications.

DataBahn provides an agentic data control plane for managing and optimizing enterprise telemetry.

Datto provides backup and disaster recovery, endpoint management, professional services automation, networking and cybersecurity solutions.

DDactic maps attack surfaces and tests DDoS resilience for enterprise infrastructure.

Decurity is a web3 security firm based in Dubai.

Deep Instinct provides deep learning-based data security that prevents malware and ransomware across cloud, NAS, applications, and endpoints.

RedTeam Security is now part of DeepSeas, which offers penetration testing, red teaming and physical testing as its offensive security practice.

Grades the security settings of domains and explains how owners can fix failures.

DEFION Security is an independent security partner that has operated since 2005.

DEKRA is a global provider of testing, inspection and certification services.

Delinea provides privileged access management and identity security for AI agents, humans, and machines.

Computer and IT infrastructure maker whose PowerProtect Data Manager software and Data Domain appliances back up data, detect ransomware and speed recovery.

Cyber advisory and managed security services, including managed extended detection and response, cloud security, digital identity and threat intelligence, from a global professional services network.

Turkish firm supplying network visibility, network testing and network security solutions.

Provides a customer and agentic identity platform for building authentication journeys for users, partners and AI agents.

DigiCert provides digital certificates and PKI solutions to secure websites, devices, software, and digital content.

Digital Hands runs a 24/7 security operations centre and managed security services for enterprises.

Global enterprise cybersecurity consultancy founded in 1999 in Oxford, holding rare CREST STAR-FS accreditation and delivering penetration testing, red and purple teaming, and PCI QSA services across five international offices.

Diopter AI sells software that watches live video and voice calls for signs of AI-driven social engineering.

Makes automated ECU and vehicle security test tools and hardware, and carries out automotive penetration testing.

dmarcian provides DMARC email authentication services and tools to protect domains from phishing and abuse.

Provides Swiss-hosted DMARC monitoring and aggregate report processing for email authentication.

DNSFilter provides DNS filtering and threat blocking services for organisations.

DomainTools provides DNS-focused threat intelligence and domain security data to detect and mitigate malicious domains.

dope.security sells a secure web gateway called dope.swg.

Doppel provides an AI-powered platform for social engineering defense and digital risk protection.

Doppler provides a secrets management platform for developers, AI agents, and automated workflows.

Dr.Web sells antivirus and security software for computers, smartphones, and other devices.

Dragos provides cybersecurity for industrial control systems and operational technology environments.

Drata provides a platform that automates security compliance, risk management and trust assurance for companies.

Turin firm selling Weseth, a remote platform for automated security and penetration testing of vehicles and devices.

Dropzone AI builds AI agents that investigate security alerts and hunt threats for security teams.

Druva provides a fully managed SaaS platform for data backup, recovery, and cyber resilience.