MXDR (Managed Extended Detection and Response)

MXDR – Managed Extended Detection and Response, is a security service that combines extended detection and response (XDR) technology with 24/7 human-led monitoring, investigation, and response. It provides organisations with enterprise-grade threat detection across endpoints, networks, cloud workloads, and identity systems, delivered as a managed service by a specialist security operations team.

For CISOs evaluating their detection and response capability, MXDR solves a fundamental challenge: you need continuous, expert-driven threat monitoring, but building and staffing an in-house security operations centre (SOC) is prohibitively expensive and difficult to recruit for. MXDR gives you the outcome. Threats detected and responded to around the clock, without the overhead of building the capability yourself.

Field	Detail
Full name	Managed Extended Detection and Response
Type	Managed security service
Evolution	EDR → XDR → MDR → MXDR
Applies to	Organisations needing 24/7 threat detection and response across their full environment
UK relevance	Supports NIS2 compliance (detection and incident response requirements), increasingly adopted by mid-market and public sector organisations
Wikipedia	No dedicated article (see Extended detection and response)
Wikidata	No dedicated entry

How MXDR evolved from EDR and MDR

Understanding MXDR requires understanding what came before it.

EDR (Endpoint Detection and Response) monitors individual endpoints: laptops, servers, workstations for malicious activity. It provides deep visibility into endpoint behaviour but is blind to network traffic, cloud environments, and identity-based attacks.

XDR (Extended Detection and Response) extends detection beyond endpoints to correlate telemetry across network, cloud, email, and identity sources. It provides a unified view of threats across the entire environment, reducing the blind spots that attackers exploit.

MDR (Managed Detection and Response) adds human expertise to the technology. A managed service where security analysts monitor alerts, investigate threats, and coordinate response on your behalf. However, many MDR providers are limited to endpoint telemetry.

MXDR combines the breadth of XDR with the managed service model of MDR. It delivers expert-led monitoring and response across the full attack surface. Endpoints, networks, cloud, email, and identity correlated through a unified platform. The result is faster detection, more accurate triage, and coordinated response across your entire environment.

What an MXDR service delivers

A mature MXDR service operates across four capabilities.

Continuous monitoring – 24/7/365 monitoring of security telemetry from across your environment. Machine learning analytics correlate events across sources, surfacing genuine threats from billions of data points and reducing false positives.

Threat hunting – proactive, hypothesis-driven searches for threats that evade automated detection. Experienced analysts look for indicators of compromise, lateral movement, and persistent access that rules-based systems miss.

Investigation and triage – when a threat is identified, the MXDR team investigates to determine scope, severity, and impact. This turns raw alerts into actionable intelligence with clear context and recommended actions.

Response and containment – coordinated response actions to contain and remediate threats. Depending on the engagement model, this ranges from guided response (recommendations for your team to execute) to active response (the MXDR team taking containment actions directly).

MXDR vs building an in-house SOC

Building an internal SOC capable of 24/7 detection and response requires significant investment. You need to recruit and retain security analysts across multiple shifts. A challenge given the ongoing cybersecurity skills shortage. You need to license, deploy, and maintain SIEM, SOAR, EDR, and XDR platforms. You need to develop detection rules, response playbooks, and threat intelligence feeds. And you need to keep all of it running continuously, including through staff turnover and technology changes.

MXDR provides the same outcome. Continuous, expert-led threat detection and response as a managed service. For mid-market organisations, public sector bodies, and enterprises that need the capability but cannot justify the cost and complexity of a dedicated SOC, MXDR is the practical path to 24/7 security operations.

How we deliver MXDR

We operate a 24/7/365 Security Operations Centre monitoring over ten billion security events every month. Our MXDR service correlates telemetry across endpoints, networks, cloud environments, and identity systems, providing unified visibility across your full attack surface.

Our service is backed by a 96% SLA compliance record on incident response, and the experience of protecting financial services, retail, entertainment, technology, transport and manufacturing organisations. We combine automated detection with proactive threat hunting and purple teaming exercises, ensuring that our detection capability evolves alongside the threat landscape.

Whether you need to supplement an existing security team or outsource detection and response entirely, our MXDR service scales to your requirements.

Learn more about our MXDR service →

Related glossary terms

• Zero trust – security architecture that MXDR supports through continuous monitoring and anomaly detection
• MITRE ATT&CK – adversary tactics framework used to structure MXDR detection rules and threat hunting
• CREST certification – accreditation held by our SOC analysts and penetration testers

External references

• Wikipedia: Extended detection and response – overview of XDR technology
• Gartner: Market Guide for Managed Detection and Response – analyst overview of the MDR/MXDR market

Frequently asked questions