Key takeaways
- EDR (endpoint detection and response) watches laptops and servers for suspicious behavior and lets you isolate and investigate an affected device.
- XDR (extended detection and response) correlates signals from endpoints, network, email, identity and cloud in one platform.
- MDR (managed detection and response) is a service: a team of analysts monitors and responds 24/7 using EDR or XDR tools.
EDR, XDR and MDR appear in almost every cybersecurity proposal today, and the terms are often mixed up. They are related but solve different problems. This guide explains each one and how to choose.
EDR: endpoint detection and response
EDR is software installed on laptops, desktops and servers. Beyond blocking known malware, it records process, file and network activity, detects suspicious behavior, and gives you response actions such as isolating a device, killing a process or rolling back changes. It is the foundation of modern endpoint security.
XDR: extended detection and response
XDR extends the same idea beyond the endpoint. It collects signals from endpoints, firewalls, email, identity and cloud services, and correlates them into a single incident. For example, a phishing email, a suspicious login and malware on a laptop appear as one attack instead of three separate alerts.
MDR: managed detection and response
MDR is not a product but a service. A provider's security analysts monitor your EDR or XDR alerts around the clock, investigate them, hunt for threats and respond, either by taking action directly or by guiding your team. It gives you a 24/7 security operations capability without building one.
Quick comparison
- What it is: EDR and XDR are technology; MDR is a service delivered by people.
- Coverage: EDR covers endpoints; XDR covers endpoints plus network, email, identity and cloud; MDR covers whatever tools it monitors.
- Who responds: with EDR and XDR, your team; with MDR, the provider's analysts, 24/7.
- Best for: EDR for every organization; XDR for teams with several security tools; MDR for organizations without a 24/7 security team.
How to choose
- Start with EDR on every endpoint and server. It is now a baseline control.
- Ask who will watch the alerts at night and on weekends. If nobody, add MDR.
- Consider XDR when you already run several security products from one vendor ecosystem and want fewer, better alerts.
- Check that the solution supports your compliance needs, such as log retention for NCA ECC.
How Thoughts House can help
We supply, deploy and support EDR and XDR platforms from leading vendors such as Sophos and Palo Alto Networks across Saudi Arabia, and arrange MDR services for organizations that need 24/7 monitoring and response.
Frequently asked questions
Is EDR the same as antivirus?
No. Traditional antivirus blocks known malware. EDR also records activity on the device, detects suspicious behavior such as ransomware encryption or credential theft, and lets you isolate the device and investigate.
Do small companies need XDR?
Not always. A small company with no security team usually gets more value from EDR combined with an MDR service. XDR becomes valuable when you have several security tools and someone to act on the correlated alerts.
What does MDR include?
Typically 24/7 monitoring of alerts, investigation, threat hunting, guided or direct response such as isolating devices, and regular reports. Scope differs by provider, so check what response actions are included.