All companies

Nucleus Security provides a platform to automate vulnerability and exposure management for enterprises and government agencies.

nuHarbor provides cybersecurity services and managed security operations to organisations across government, healthcare, finance and enterprise.

NuSummit provides AI, cybersecurity, cloud, and digital engineering services to financial institutions.

Nuvol Cybersecurity is a boutique cybersecurity firm founded in 2017 in Panama.

O3 Security sells a platform for software supply chain security.

Offensive360 provides application security testing and risk management tools for enterprises.

Observo AI built an AI-native security data pipeline that filtered and enriched telemetry before it reached the SIEM.

Obsidian Security provides security for third-party applications and AI agents.

Creators of OSCP, Kali Linux, and Exploit-DB, offering penetration testing services from the team that trains the world's ethical hackers.

Okta provides cloud-based identity and access management solutions for workforce and customer identities.

Omada provides identity governance and administration software for managing human and AI identities.

Provides a platform for managing cryptographic trust across devices, systems and AI.

One Identity provides identity security and access management software.

ONEKEY provides a platform for product cybersecurity and compliance, automating SBOM analysis, vulnerability detection, and regulatory compliance.

OneLogin sells identity and access management software.

OneSpan provides authentication, fraud prevention, and eSignature solutions for digital agreements and transactions.

Third-party management and tech risk and compliance software, alongside privacy automation, consent management and AI governance tools.

CREST-accredited, platform-driven penetration testing vendor in Bristol offering AI-augmented testing with rapid self-service booking for over 400 global customers.

Ontinue provides managed detection and response services for Microsoft security customers.

Onum built a real-time telemetry pipeline that filtered, enriched and routed security data in stream.

Provides a trust layer that lets organisations run AI on sensitive data with hardware-enforced governance and verifiable proof.

OpenText provides software and services for managing information across an organisation.

OpenOrigins provides trust infrastructure for the AI internet.

Opportify provides risk intelligence and fraud prevention tools.

Opsis provides an OSINT search platform for looking up emails, usernames and domains across public sources.

OPSWAT provides cybersecurity solutions to protect critical infrastructure from file-borne and device-borne threats.

Optiv advises, deploys, and operates cybersecurity programs for organizations.

Audit, risk and compliance software, formerly AuditBoard, with controls management, cyber risk management, third-party risk, regulatory compliance and AI governance products.

Identity and access management with OCI IAM, Oracle Access Management and Oracle Access Governance, alongside Oracle Cloud Infrastructure and Oracle's business applications.

Orca Security provides an agentless cloud security platform that scans workloads from the cloud control plane rather than by installing agents.

Ordr provides a platform that discovers and enforces security policies for connected devices across IT, IoT, OT, and IoMT.

OSINT Industries provides open-source intelligence tools for online investigations.

Ossprey Security is a cybersecurity company that focuses on detecting malicious code in open source dependencies.

Outerlimit provides a security and authorization layer for agentic AI systems.

Exposure management platform with vulnerability management, external attack surface management, application security testing, pen testing as a service and digital risk protection.

CREST-accredited Canadian pen testing firm with a 95% manual-first approach. All testers hold OSCP minimum certification. Zero false positive guarantee.

Palo Alto Networks provides cybersecurity platforms and services to protect organizations from cyber threats.

Tier 1 supplier selling its VERZEUSE tools for threat analysis, vulnerability triage and runtime protection to carmakers.

Panop provides a platform for autonomous exposure management across cloud environments and attack surfaces.

Third-party cyber risk management platform with vendor security questionnaires, external attack surface ratings, continuous monitoring and remediation workflows for suppliers.

Paramount Defenses provides software to assess privileged access and identify privilege escalation paths in Microsoft Active Directory.

Paravision builds identity AI software.

Passbolt provides an open source password manager for teams to share credentials securely.

PathSolutions sells TotalView, a network operations intelligence platform.

Paubox provides HIPAA compliant email and security services for healthcare organisations.

Pune security firm testing in-vehicle systems, telematics and EV charging, with a hands-on car hacking course.

PCA Cyber Security provides embedded product security services and PCA CERVUS, a device-centric vulnerability monitoring and threat intelligence platform driven from product SBOMs.

The UK's largest independent security testing firm, renowned for IoT/OT research, CBEST red teaming, and CHECK/CREST-accredited penetration testing across all sectors.

Dubai-based CREST and ISO certified pen testing specialist serving the GCC region with full VAPT services.

Penetrify provides automated penetration testing for web applications.