Cybersecurity giant Sophos has acquired fellow UK-based firm Arco Cyber, a cybersecurity assurance company dedicated to helping organisations improve their security posture.

Sophos, owned by US private equity giant Thoma Bravo, said Arco Cyber will join as a dedicated team to advance Sophos CISO Advantage.

This is described as a set of capabilities designed to scale the knowledge, judgment and operating discipline of a world-class CISO to organisations with or without dedicated security leadership – combining agentic AI, integrated platforms and human expertise delivered in partnership with managed service providers (MSPs) and managed security service providers (MSSPs).

Arco’s technology and expertise will be integrated into Sophos Central, a platform delivering its wider ecosystem including advisory services, managed detection and response and partner-delivered services.