Cyro Cyber - Best Security Company (Under 250 Employees)

Cyro Cyber is a specialist UK based cybersecurity MSSP, dedicated to strengthening the cyber resilience of the nation’s most critical systems and providers of essential services. As a CREST and NCSC Cyber Resilience Auditor, Cyro delivers trusted assurance, compliance, and threat management capabilities across the UK’s most complex regulated environments.

Cyro provides both Managed Security and Professional Services, combining deep technical knowledge with decades of cyber security operational experience. Our teams support clients across critical national infrastructure, utilities (water and energy), transport, healthcare, finance, insurance, legal, retail, emergency services, and government, ensuring compliance with leading frameworks including NCSC CAF, NIS2, Cyber Essentials Plus, NIST CSF, PCI DSS, and ISO27001. Our services are structured around four specialist domains: -Governance, Risk & Compliance: strategic cyber assurance, risk and maturity assessment, compliance alignment and fractional expertise resource. -Offensive Security Testing: CREST accredited penetration testing, red teaming, adversary simulation and continuous vulnerability management. -Security Architecture & Engineering: secure by design infrastructure, zero trust architecture, cloud hardening and assurance, and OT network management. -Managed Detection & Response (MDR/MXDR): 24/7/365 detection & response, threat hunting, threat intelligence, and incident response from our CREST accredited, UK based SOC. All of Cyro’s consultants are SC cleared and hold industry leading accreditations, including CISSP, CISM, OSCP, CREST, CCP, and CIISEC, underpinned by organisational certifications such as ISO27001, ISO22301, ISO9001, and Cyber Essentials Plus. With 30+ years of experience securing IT and OT infrastructure, Cyro brings a rare blend of strategic insight, technical depth, and pragmatic delivery. We help organisations translate compliance challenges into meaningful resilient controls, align people and process with technology, and manage cyber risk with confidence. Cyro Cyber is backed by M Group Services Limited and CVC Capital Partners, strengthening our ability to deliver world class cyber capabilities across the UK’s Critical National Infrastructure landscape