ReliaQuest Secures Over $500 Million, CEO Says ‘Security Is A Team Sport’

Cybersecurity platform ReliaQuest has secured over $500 million in a new funding round, raising its valuation to $3.4 billion. The funding round was led by EQT, KKR, and FTV Capital, with participation from existing investors Ten Eleven Ventures and Finback Investment Partners. A global cybersecurity leader, ReliaQuest provides large enterprises with a distinctive, AI-driven approach to security operations. Sophisticated Attacks Need Sophisticated Solutions Brian Murphy, a former cybersecurity professional, founded ReliaQuest in 2007. His experience in the field highlighted the challenges organizations faced in managing complex security operations, often due to a lack of expertise or resources. To address this gap, Murphy sought to create a more intelligent and automated solution. This AI-powered cybersecurity company focuses on providing threat detection and response solutions. It leverages advanced artificial intelligence, machine learning, and automation to help businesses identify and mitigate cybersecurity threats more efficiently and effectively. The demand for effective cybersecurity systems that can withstand sophisticated threats is increasing, as companies are adopting AI technologies and their operations are becoming more vulnerable to complex cybersecurity challenges. “Enterprise security teams have more data in more places than ever before, and the speed of the threat is rapidly increasing. CISOs need a way to contain threats within minutes without added cost or technical overhead, leveraging the latest innovations in Agentic AI,” said Brian Murphy, ReliaQuest founder and CEO ReliaQuest's platform integrates with existing security tools and infrastructure, such as firewalls, intrusion detection systems (IDS), and endpoint protection systems. This approach allows the cybersecurity technology company to deliver outcomes tailored to each organization's specific architecture, technology, and business needs. GreyMatter Redefining Security GreyMatter, the company's primary product, is a technology-agnostic security operations platform based on an open extended detection and response architecture. ReliaQuest's Annual Cyber-Threat Report for 2025 has revealed a concerning decrease in the time threat actors need to move laterally within compromised networks. This critical finding highlights the escalating speed and sophistication of cyberattacks, with adversaries now able to navigate through networks and gain access to sensitive data in an average of just 48 minutes. This alarming statistic underscores the urgent need for organizations to adopt faster and more effective security operations to detect and contain threats before they can cause significant damage. ReliaQuest's agentic AI models can operate and learn autonomously, automating security processes and significantly reducing the time required to contain threats. As a result, ReliaQuest customers can now investigate 20 times faster and with 30% more accuracy than traditional methods. This allows threats to be contained in less than five minutes, enabling security teams to focus on higher-level business needs rather than mundane tasks. ReliaQuest's GreyMatter system includes Threat Hunts, automated threat-hunting packages that scan security tools, systems, and business applications. These packages identify hidden network issues and bring them to the attention of analysts, improving security and providing peace of mind for security leaders. ReliaQuest Soars with 4x Growth and Global Expansion ReliaQuest has experienced a period of rapid growth, with Annual Recurring Revenue increasing by over 4 times since their last funding round in 2020, led by KKR. The company has recently surpassed $300 million in ARR and is currently growing at a rate exceeding 30% year-over-year, while maintaining profitability. This new round of funding comes at an opportune time to further support and accelerate this growth. This new round of fund will be used to support ReliaQuest’s continued growth, fueling further innovation in Agentic AI-driven cybersecurity automation and supporting the company’s ongoing international expansion. Stephen Shanley, Partner and Head of Tech Growth in Europe at KKR, said, “When we first invested in ReliaQuest in 2020, we recognized its enormous potential given the rise of cyberattacks and the challenges cybersecurity teams faced in managing a multitude of tools with limited manpower. Over the years, the company has transformed with its leading AI-driven software platform, a relentless focus on innovation and a unique company culture,” As ReliaQuest continues to scale, it plans to further enhance its platform and capabilities, addressing the evolving cybersecurity needs of enterprises around the world. As CEO Brian Murphy puts it, “Security is a team sport,” underscoring the importance of collaboration and innovation in defending against modern cyber threats.

ReliaQuest Secures Over $500 Million, CEO Says ‘Security Is A Team Sport’

Sophisticated Attacks Need Sophisticated Solutions

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