ReliaQuest's GreyMatter is a SaaS security operations platform. It connects to the security tools a customer already owns (200+ integrations), normalizes their data, and uses AI and automation for threat detection, investigation and containment. It is sold on a subscription basis to enterprise security teams, with more than 1,300 customers reported in 2025. Founder-CEO Brian Murphy started the company in 2007 and bootstrapped it until a $30M investment in 2016. It raised $300M in 2020 and about $500M in March 2025 (led by EQT, KKR and FTV) at a $3.4B valuation. It reported ARR above $300M in 2025.
