Microsoft-native managed XDR and security services for enterprise cloud environments
CyberOne is a Microsoft Security Elite Partner delivering managed extended detection and response built on Microsoft's security platform (Defender XDR, Sentinel, Entra). The stack is almost entirely Microsoft-first—no competing SIEM adoption—which positions them as a pure-play implementation and managed-services partner rather than a platform vendor. Hiring is skewed toward security (5 roles) and mid-to-senior seniority, with active work on tenant migrations, cloud compliance (Purview DLP), and customer performance improvement, suggesting a services-delivery org scaling to handle enterprise cloud transformation.
CyberOne operates a managed security services business focused on Microsoft cloud environments. They deliver Managed XDR (Defender XDR + Sentinel + Entra), identity and endpoint protection, and compliance services through their AssureMAP assessment framework and Assure 365 managed service suite. The company holds NCSC and CREST accreditations, maintains 24/7 global SOC coverage, and operates across identity, data security, and endpoint detection. Founded in 2005 and based in London, CyberOne has 51–200 employees and sells to mid-market and enterprise organizations seeking to accelerate cloud adoption and security maturity on Microsoft infrastructure.
CyberOne uses Microsoft security stack: Defender XDR, Sentinel, Entra, Intune, Purview, Copilot for Security, and Microsoft 365 services (Exchange Online, SharePoint, OneDrive). Supporting tools include Splunk, McAfee, Rapid7, LogRhythm, and Monday.com for operations.
CyberOne is a Microsoft Security Elite Partner with Microsoft-Verified Managed XDR solution status. The company holds NCSC and CREST accreditations and is a member of the Microsoft Intelligent Security Association.
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CyberOne's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →
This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.