All companies
Every cybersecurity vendor and service firm on the list. Tick the filters to build a shortlist, then open a profile to see who owns the company and what it does. You can also browse by category or country, or see recent deals.
Results
| Company | Category | Based in | Founded | Ownership |
|---|---|---|---|---|
Aristi CHECK and CREST-accredited Birmingham-based cyber security consultancy with over 15 years of experience delivering penetration testing, red teaming, and OT security assessments for government and private sector clients. | Penetration testing | Birmingham, United Kingdom | 2008 | Owned by Limerston Capital |
Armis Armis provides cyber exposure management and security for connected devices and operational technology. | IoT, embedded and product security | United States | Part of ServiceNow | |
A Armor Provides cloud security, compliance and managed detection and response services to regulated industries. | Managed detection and response | Plano, United States | 2009 | Private |
ARPSyndicate Builds internet-scale intelligence datasets and security products for vulnerability, subdomain, and physical reconnaissance. | Attack surface management | New Delhi, India | Private | |
Arsen Security Arsen provides a platform for cybersecurity awareness and social engineering simulation. | Security awareness and human risk | Paris, France | 2021 | Private |
Artemis Security Artemis Security provides an AI-native security operations platform that detects, investigates and responds to cyber attacks. | SIEM | New York, United States | Private | |
Article 14 Ready Article 14 Ready provides a browser-based working packet for manufacturers that fall under the EU Cyber Resilience Act. | GRC and compliance automation | Mannheim, Germany | 2020 | Private |
Asimily Asimily provides a platform to discover, assess, and mitigate risks for IoT, OT, and IoMT devices. | IoT, embedded and product security | Sunnyvale, United States | Private | |
Assured Security Consultants Gothenburg consultancy testing ECUs, vehicle buses, telematics and OTA pipelines, and advising on R155 and ISO 21434. | Penetration testing | Gothenburg, Sweden | 2015 | Private |
asvin Software and services for cyber risk analysis, secure software updates and UNECE R155 and R156 compliance. | Automotive cybersecurity | Stuttgart, Germany | 2018 | Private |
AT&T Cybersecurity AT&T Cybersecurity provides network security services to businesses of all sizes. | SASE and SSE | San Mateo, United States | 2007 | Owned by WillJam Ventures |
Athena Agentic Athena Agentic provides a unified cyber operations platform that automates detection, response, and hardening. | Agentic SOC tools | Dallas, United States | Private | |
AtlasCyber Provides agentic threat intelligence and validation for critical infrastructure security teams. | Threat intelligence | Merrimack, United States | Private | |
Atredis Partners Employee-owned research firm testing embedded systems, including vehicle infotainment, telematics units and CAN networks. | Penetration testing | United States | Private | |
AttackIQ AttackIQ provides a platform for continuous threat exposure management and adversarial exposure validation. | Breach and attack simulation | Los Altos, United States | 2014 | Private |
Auth0 Auth0 provides authentication and authorization services for applications and AI agents. | Customer identity | Bellevue, United States | 2013 | Part of Okta |
Authentik Security Authentik Security provides a self-hosted open source identity provider for authentication and access management. | Identity and access management | Philadelphia, United States | 2020 | Private |
AUTOCRYPT Korean supplier of in-vehicle security software, V2X and Plug&Charge PKI, security testing tools and R155 consulting. | Automotive cybersecurity | Seoul, South Korea | 2019 | Public, 331740 |
Automiq Automiq is an automation strategy and transformation partner. | Security consulting and vCISO | London, United Kingdom | 2025 | Private |
AutoSifu Indian consultancy helping vehicle makers gain UN R155, R156 and AIS-189 approval, with TARA tools and penetration testing. | Automotive cybersecurity | Jaipur, India | Private | |
Auxilium Cyber Security Ettlingen consultancy pentesting vehicles, ADAS, gateways, infotainment and on-board chargers, plus R155 CSMS consulting. | Automotive cybersecurity | Ettlingen, Germany | 2015 | Private |
Axoflow Axoflow provides an autonomous security data layer that curates and manages security data for SecOps. | Security data pipelines | Budapest, Hungary | 2023 | Private |
Axonius Asset intelligence platform that builds one inventory of every asset from connected IT and security tools to find coverage gaps and prioritise exposures. | Attack surface management | New York, United States | Private | |
Babel Street Risk intelligence platform that gathers multilingual online data and uses AI agents for threat, identity and vendor risk investigations by government and enterprise. | Threat intelligence | Reston, United States | Private | |
BackBox BackBox provides a cyber resilience platform for automating network security, compliance, and lifecycle management. | Backup and cyber recovery | Addison, United States | 2009 | Private |
BARR Advisory BARR Advisory helps organisations establish, manage, and audit cybersecurity and compliance programmes. | Compliance audits (SOC 2, ISO 27001) | Kansas City, United States | Private | |
Barracuda Networks Barracuda Networks provides cybersecurity solutions for email, networks, applications, and data. | Email security | Campbell, United States | 2003 | Owned by KKR |
BCIT BCIT is a cybersecurity and compliance consulting firm and training organisation based in France. | Security consulting and vCISO | Pranzac, France | 2022 | Private |
BeforeCrypt BeforeCrypt is a ransomware recovery and incident response provider. | Incident response | Paphos, Cyprus | 2021 | Private |
Beyond Identity Beyond Identity provides identity security software that eliminates passwords and verifies users and devices. | MFA and passwordless authentication | New York, United States | Private | |
BigID BigID provides a data intelligence platform for discovering, classifying, and governing enterprise data and AI. | Data security posture management | New York City, Israel | 2016 | Private |
Binary Defense Binary Defense provides managed detection and response services and an AI-powered security platform. | Managed detection and response | Stow, United States | Private | |
Bindplane OpenTelemetry pipeline that collects, reduces, masks and routes logs and other telemetry to SIEM, storage and observability tools. | Security data pipelines | United States | Private | |
BIO-key International BIO-key provides identity and access management solutions with biometric authentication for enterprises and organisations. | Identity and access management | Holmdel, United States | Public, BKYI | |
BioCatch BioCatch analyses user behaviour to detect and prevent fraud and financial crime for banks. | Fraud and payment fraud prevention | Israel | 2010 | Owned by Permira |
Bishop Fox Tempe, Arizona-headquartered offensive security firm and Black Hat / DEF CON regulars, makers of the Cosmos continuous attack surface management platform. | Penetration testing | Tempe, United States | 2005 | Private |
Bitdefender Bitdefender provides cybersecurity software and services for consumers, businesses, and governments. | Endpoint protection and antivirus | Bucharest, Romania | 2001 | Private |
BitScore Cybertech LLP BitScore Cybertech LLP is a delivery partner for Bitsight security ratings in India. | Third-party risk and security ratings | Ahmedabad, India | 2016 | Private |
Bitsight Bitsight provides a cyber risk intelligence platform. | Third-party risk and security ratings | Back Bay, United States | 2011 | Private |
Bitwarden Bitwarden provides open source password management and secrets management for individuals and organisations. | Password managers | Santa Barbara, United States | 2016 | Private |
Black Duck Black Duck provides application security testing tools for software development. | Application security testing | Burlington, Massachusetts, United States | 2002 | Owned by Clearlake Capital and Francisco Partners |
Black Hills Information Security Community-driven penetration testing firm known for free security education, open-source tools, Wild West Hackin' Fest, and practical offensive security services. | Penetration testing | Spearfish, United States | 2008 | Private |
Black Kite Black Kite provides an AI-native third-party cyber risk management platform for monitoring and assessing vendor risks. | Third-party risk and security ratings | Boston, United States | 2016 | Private |
BlackBerry Certicom BlackBerry subsidiary providing cryptographic key management, managed PKI and code signing for vehicle supply chains and in-car networks. | Encryption and key management | Mississauga, Canada | 1985 | Owned by BlackBerry |
Blast Security Blast Security provides a preemptive cloud defense platform. | Cloud security (CNAPP and CSPM) | Tel Aviv, Israel | 2024 | Private |
Block Harbor Cybersecurity Detroit firm offering a vehicle security engineering platform alongside automotive penetration testing and defensive security services. | Automotive cybersecurity | Detroit, United States | Private | |
BlueCat Networks Policy driven DNS security and threat protection through BlueCat Edge, alongside DNS, DHCP and IP address management and network observability software. | DNS security | Toronto, Canada | Private | |
BlueRock Security BlueRock provides observability and guardrails for AI agents in production. | AI and LLM security | San Mateo, United States | 2017 | Private |
Blumira Blumira provides a security operations platform for IT teams to detect and respond to threats. | SIEM | Ann Arbor, United States | Private | |
Bondgate IT Bondgate IT is a managed service provider founded in 1998. | Managed security services | Darlington, United Kingdom | 1998 | Private |