K3Y Ltd
Corporate brand
UnclaimedBulgarian cybersecurity company providing offensive and defensive security services alongside research-driven products such as K3CyberRadar, K3NetOrchestra and K3DecoyNet.
Last updated September 28, 2026
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Overview
K3Y Ltd is a cybersecurity company based in Sofia, Bulgaria, operating under the k3ylabs.com brand. The company describes itself as built on two major pillars: Cybersecurity Services and Research & Development. Its service line covers vulnerability assessment, penetration testing, purple teaming and cyber security consulting, while its R&D arm designs, develops and implements customised solutions, products and frameworks aimed at neutralising hostile attacks. On the services side, K3Y positions itself around proactive and realistic security testing. Its vulnerability assessment offering combines automated tooling with manual techniques to surface risks before attackers do; its penetration testing goes beyond standard tooling to simulate real-world attacks against web applications, mobile apps and hardware systems; and its purple teaming service blends red-team and blue-team perspectives to improve defensive controls. The company also provides cyber security consulting, framing itself as a partner that understands client needs and addresses sophisticated threats through accumulated experience. K3Y's research and development work is oriented toward emerging technology domains. The company lists Cyber-AI, ICS/SCADA security, 5G emulation services, SDN management and digital twins among its solution areas. This R&D activity feeds a product portfolio that includes K3CyberRadar, a federated SIEM system with AI-powered detectors and support for industrial and 5G protocols; K3NetOrchestra; and K3DecoyNet, a deception solution built around managed honeypot applications. K3Y also participates in publicly funded research projects under programmes including H2020, Horizon Europe, Erasmus+ and MSCA, and maintains an active blog and news stream covering project meetings and stakeholder workshops. The company's stated vision is to become "the most compelling cybersecurity company of the 21st century" by driving a transition to ethical hacking, and its mission is to deliver high-quality, innovative and custom cybersecurity services and solutions that reduce risk across all clients. K3Y is a private company; no parent company, founder or founding year is confirmed by the available evidence.
History
K3Y Ltd is a cybersecurity company located in Sofia, Bulgaria. Public evidence about the company is concentrated in its own web presence and a Wikidata entry describing it simply as a company in Sofia, Bulgaria. The available material does not confirm a founding year, founder or ownership structure, so the company's early corporate history cannot be reconstructed from the supplied sources. What is documented is the shape of the business as it presents itself today. K3Y describes its organisation as resting on two major pillars: Cybersecurity Services and Research & Development. The services pillar draws on what the company calls "lots of years of cyber security experience" and is aimed at improving the security posture of client organisations. The R&D pillar supplies the know-how for new innovative technologies and services, and the company says it produces advanced technology intended to "neutralize, damage, and destroy hostile attacks." The service catalogue has been built around proactive security testing. Vulnerability Assessment is offered as a comprehensive service that combines automated tools with manual techniques and delivers a detailed findings report with risk levels and remediation steps. Penetration Testing is presented as a comprehensive evaluation of assets including web applications, mobile apps and hardware systems, with experts simulating real-world attacks in a non-disruptive way. Purple Teaming blends red-team and blue-team activity to test and improve defensive controls, and Cyber Security Consulting addresses sophisticated threats by understanding client needs and applying the company's experience. Alongside services, K3Y has developed a research-driven product line. K3CyberRadar is described as a cutting-edge Security Information and Event Management (SIEM) system, specifically a federated SIEM combining AI-powered detectors with signature- and specification-based solutions for real-time threat detection and mitigation. It is designed with a focus on industrial and 5G protocols, listing support for Modbus/TCP, DNP3, IEC 61850, IEC 60870-5-104, MQTT, SSH, FTP, HTTP/HTTP2 and PFCP, and it uses Federated Learning for distributed intelligence detection and Software-Defined Networking for mitigation. K3DecoyNet is a deception product built on multiple honeypot applications organised and managed by a Honeypot Manager, using Reinforcement Learning to orchestrate and deploy honeypots and a dashboard for control. K3NetOrchestra is also listed among the company's products. K3Y's research activity extends into collaborative, publicly funded programmes. The company states that it is involved in several R&D projects under H2020, Horizon Europe, Erasmus+ and MSCA. Its news stream references a RegulAIze kick-off meeting, a Women4AGreenEU national stakeholder workshop organised by K3Y in Bulgaria, and the third plenary meeting of XTRUST-6G, indicating engagement with EU-funded research and innovation consortia. The company frames its purpose in ambitious terms. Its vision is to create "the most compelling cybersecurity company of the 21st century" by driving the world's transition to ethical hacking that protects, supports and drives a company's cyber identity to success. Its mission is to deliver high-quality, innovative and custom cybersecurity services and solutions that reduce risk across all clients. It also invokes Robert S. Mueller's observation that there are only two types of companies: those that have been hacked and those that will be hacked.
Products and positioning
A Sofia-based cybersecurity firm combining offensive security services with publicly funded R&D, positioning itself around ethical hacking and advanced technology domains such as Cyber-AI, ICS/SCADA security, 5G emulation, SDN management and digital twins.
K3CyberRadar
A federated Security Information and Event Management (SIEM) system combining AI-powered detectors with signature/specification-based solutions for real-time threat detection and mitigation, focused on industrial and 5G protocols including Modbus/TCP, DNP3, IEC 61850, IEC 60870-5-104, MQTT, SSH, FTP, HTTP/HTTP2 and PFCP; uses Federated Learning for distributed intelligence detection and SDN for mitigation.
K3DecoyNet
A deception solution incorporating multiple honeypot applications organised and managed by a Honeypot Manager, using Reinforcement Learning to orchestrate and deploy honeypots, with a user-friendly dashboard for control.
K3NetOrchestra
Listed among K3Y's cybersecurity products for businesses of all sizes.
Vulnerability Assessment
A comprehensive service combining automated tools and manual techniques to scan and evaluate systems, networks and applications for vulnerabilities, delivering a detailed report with risk levels and remediation steps.
Penetration Testing
A comprehensive security evaluation of assets including web applications, mobile apps and hardware systems, with experts simulating real-world attacks and providing actionable recommendations in a non-disruptive way.
Purple Teaming
A service blending red and blue teaming to help organisations test and improve their security posture by discovering security gaps through multi-step real-world simulation attacks.
Cyber Security Consulting
Sophisticated solutions to cyber security threats by understanding client needs and addressing them through the company's experience.
Sources5 sources
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