All companies

Harmonic Security provides software that discovers, classifies and controls how employees use AI tools at work.

Harness provides an AI-native software delivery platform for DevOps, testing, security, and cost optimization.

HashiCorp provides multi-cloud infrastructure automation tools.

HB Technologies provides smart card and digital security solutions for government, banking, telecom and transport sectors.

Enterprise software maker selling AppScan for static, dynamic and interactive application security testing and software composition analysis, alongside BigFix, Domino and other products.

Heelr is a marketplace connecting organisations with verified cybersecurity professionals and providers.

Hexens audits smart contracts and provides offensive security for blockchain and Web3 projects.

Authentication products including FIDO security keys, smart cards and passkey management, alongside physical access control, credential issuance and identity technology.

HiddenLayer provides a security platform for AI applications, protecting against adversarial threats.

Hillstone Networks provides cyber security products including firewalls, threat detection and cloud workload protection.

Berlin-headquartered German cybersecurity consultancy with 30+ years of BSI IT-Grundschutz experience. Trusted by federal agencies, DAX corporations, and critical infrastructure operators.

Holm Security provides a platform for vulnerability management and attack surface management.

UK vehicle engineering and test centre offering threat modelling, CSMS support and security testing for vehicles.

Horizon3 runs autonomous attack testing to find and verify exploitable weaknesses in production environments.

Hornetsecurity provides Microsoft 365 security, backup, and compliance services for managed service providers.

Hoxhunt provides a platform for phishing simulations and security awareness training.

Security service edge combining ZTNA, secure web gateway, CASB and firewall as a service, alongside HPE servers, storage, networking and hybrid cloud.

Network security products including firewalls, unified SASE and HiSec Endpoint security, alongside Huawei's enterprise networking and telecommunications equipment.

HUMAN Security protects digital interactions from bots, fraud, and abuse across advertising, applications, and accounts.

Huntress provides managed cybersecurity services including endpoint detection, identity threat detection, and security awareness training.

Backup and disaster recovery service for SaaS applications, public cloud and data centre workloads, including a low code platform for adding new SaaS integrations.

HYPR provides passwordless authentication and identity verification for enterprises.

IBM is a technology company that sells software, infrastructure, and consulting services.

iboss provides security for AI, data, and applications through a unified SASE platform.

Provides managed IT support and cybersecurity services to businesses in San Antonio.

Provides cybersecurity platforms combining post-quantum encryption and AI models for businesses and governments.

IDScan provides identity document verification software to authenticate customers and prevent fraud.

IGEL provides a secure endpoint operating system for cloud workspaces and virtual desktop environments.

IKARUS Security Software is an Austrian cybersecurity vendor.

Immersive Labs sells a platform called Immersive One that helps organisations show how ready they are for cyber threats.

Immunefi runs bug bounty programmes and security services for cryptocurrency and smart contract projects.

Imperva is a cybersecurity company that provides application security and data security.

Imprivata provides access management and digital identity solutions for organisations in mission-critical and life-critical sectors.

Beijing supplier of vehicle security gateways, intrusion detection, HSM firmware, a vehicle SOC platform and compliance consulting.

Provides an AI-native platform for monitoring and managing risk in industrial cyber-physical systems.

Provides a platform for managing application secrets, certificates and privileged access.

Infoblox provides networking and security software for DNS, DHCP and IP address management.

Infysec provides cyber security services, training, and research and development.

Integris provides managed IT, cybersecurity, AI and cloud services to small and midsize businesses.

CREST-accredited pan-European cybersecurity services provider delivering penetration testing and managed security from Dublin with a strong UK and Ireland presence.

Intel 471 provides cyber threat intelligence focused on adversary tracking, malware intelligence and underground marketplace coverage.

Intelligence X operates a search engine and data archive for open source intelligence.

IntelliGRC provides software that helps managed service providers automate cybersecurity compliance and audit readiness.

InterIntra is an Australian managed IT and cyber security provider.

Provides technical surveillance counter-measures and cyber audits to protect corporate information.

Testing and certification group that helps vehicle makers and suppliers work towards ISO/SAE 21434 compliance.

Intezer provides an AI-powered security operations center that investigates all alerts at forensic depth.

Intigriti runs a crowdsourced security platform connecting organisations with ethical hackers for bug bounties and testing.

Intruder provides continuous vulnerability scanning and attack surface management for cloud and web assets.

Intrudify sells an AI-driven penetration testing platform for web applications and APIs.