EDR (endpoint detection and response) records what happens on laptops, servers and cloud workloads, and lets you investigate and contain threats on those devices. XDR (extended detection and response) takes that endpoint telemetry and correlates it with other sources, such as identity, email, network and cloud, into one incident, with response actions across them. Most XDR products include an EDR. The practical difference in EDR vs XDR is scope: choose EDR when your main risk and your team's capacity sit on the endpoint; choose XDR when investigations routinely cross accounts, mailboxes and the network, and you can license and connect those sources.
This guide sets out the differences side by side, walks one intrusion through each, gives a decision checklist and explains where MDR and SIEM fit.
EDR vs XDR at a glance
| EDR | XDR | |
|---|---|---|
| Scope | Endpoints: desktops, laptops, servers, cloud workloads | Endpoints plus identity, email, network, cloud and applications, depending on the product |
| Telemetry | Process, file, registry, login and connection events from an agent on each device | Endpoint telemetry joined with identity sign-ins, email events, network traffic and cloud audit logs |
| Correlation | Within and across endpoints (for example, one process tree, or the same file on ten machines) | Across sources, so a phishing email, a sign-in and a process on a laptop become one incident |
| Response | Isolate a device, kill a process, quarantine a file, roll back changes | Endpoint actions plus source-specific ones, such as removing an email from every mailbox or disabling an account |
| Who runs it | An IT or security team, or a managed service provider (MDR) | A security team comfortable working across sources, or an MDR provider |
| Cost model | Usually per device or per endpoint per year | Usually a platform licence or bundle; cost grows with the number of sources and products licensed |
| Typical fit | Small teams, endpoint-heavy risk, first step beyond antivirus | Teams consolidating tools, or already buying several products from one vendor |
Published prices illustrate the EDR model. CrowdStrike lists Falcon Enterprise, its first tier with EDR, at US$184.99 per device on annual billing, and SentinelOne lists Singularity Complete at US$179.99 per endpoint per year for 5 to 100 workstations (both US dollars, accessed 23 September 2026). XDR is rarely priced on a public page; for Microsoft, XDR is the combination of Defender products you already license.
What EDR does
An EDR agent sits on each device and records process creation, command lines, file changes, logins and network connections. Analysts use that record to answer three questions: what ran, where it came from and what it touched. Response actions work on the device itself: isolate it from the network, stop a process, delete a file or roll the device back.
EDR's limit is its vantage point. It sees the process that opened a malicious attachment, but not the email that delivered it to forty other people, and not the unusual sign-in from abroad that happened an hour later. EDR also depends on its own telemetry being intact. An independent assessment of leading endpoint security products against advanced persistent threat techniques found they failed to prevent and log the bulk of the attacks tested, and described ways to tamper with EDR telemetry providers (Karantzas and Patsakis, Journal of Cybersecurity and Privacy, 2021). A second, independent source of evidence, such as network or identity data, is what makes that kind of tampering visible.
What XDR adds
XDR joins endpoint telemetry to other security sources and treats the joined record as one incident. Two vendor definitions show the range:
- Microsoft describes Defender XDR as a suite that "natively coordinates detection, prevention, investigation, and response across endpoints, identities, email, and applications". Its documentation notes that it correlates signals only from the Microsoft security products you have licensed and provisioned. One of its cross-product actions: when Defender for Endpoint finds a malicious file, Defender for Office 365 removes that file from every mailbox.
- Palo Alto Networks describes Cortex XDR as connecting endpoint, network, cloud, identity and email data.
These are examples of native XDR: the vendor's own products supply most sources. Open XDR takes more of its data from third-party tools you already run. Many platforms now do both; TrendAI, for example, says its Vision One XDR unifies native and third-party telemetry in one console. The question to ask any vendor is which of your existing tools it can ingest, and whether correlation and response work as well on third-party data as on its own.
The differences in practice: one intrusion, two views
Take a common intrusion and follow it through each tool.
- 09:02. A finance user receives an email with a link to a fake invoice portal and enters their password.
- 09:40. The attacker signs in to the user's cloud mailbox from an unfamiliar network and sets a forwarding rule.
- 10:15. The same user opens a second lure on their laptop, which runs an encoded PowerShell command.
- 10:16. The laptop begins beaconing to an external server every sixty seconds.
With EDR only, the alert fires at 10:15 on the PowerShell command, and the beacon at 10:16 is attributed to that process. The analyst isolates the laptop. Steps 1 and 2 are invisible: the password is still stolen and the mail forwarding rule is still live.
With XDR covering email and identity, the 10:15 alert is joined to the 09:02 email and the 09:40 sign-in because they share a user. The analyst sees one incident with four steps, isolates the laptop, resets the password, revokes sessions, removes the forwarding rule and pulls the lure from other mailboxes.
The difference is not that XDR detects the PowerShell better. It is that the incident is complete, so the response is complete.
Which do you need? A decision checklist
Answer each question. Mostly "yes" in the first group points to EDR (with a managed service if you have no out-of-hours cover). Any "yes" in the second group points to XDR or a unified platform.
EDR is likely enough if:
- Your estate is mostly managed endpoints, and email and identity are already well protected by other controls you trust.
- Your team is one to three people, and you need a tool they can run without joining data sources.
- You plan to buy a managed service that will watch the endpoint alerts 24/7.
- Budget is fixed per device and must stay predictable.
XDR or a unified platform is likely worth it if:
- Your recent incidents started with phishing, stolen credentials or a cloud account, not with malware on a device.
- Analysts regularly switch between three or more consoles to investigate one alert.
- You already license several products from one vendor (for example Microsoft 365 E5) and are not using their correlation.
- You need network visibility on segments where you cannot install an agent, or evidence that holds up if endpoint telemetry is tampered with.
- Alert volume is the problem. Research with security operations centre analysts found that most alarms are benign triggers, true alarms explained by legitimate activity, and that validating them causes burnout and desensitisation (Alahmadi, Axon and Martinovic, USENIX Security, 2022). Correlation across sources is one of the main ways to add the context that separates the few real incidents from the rest.
For a shortlist of products in each group, see our comparison of EDR solutions.
Where MDR and SIEM fit
MDR is a service, not a product. A managed detection and response provider runs the EDR or XDR for you, usually 24/7, and responds to what it finds. CrowdStrike's Falcon Complete is MDR on CrowdStrike's own platform; Sophos says Sophos MDR provides 24/7 threat detection, threat hunting and incident response. Choose MDR when you cannot staff alerts around the clock, whichever of EDR or XDR sits underneath. Our guide to MDR vs MSSP covers how the service models differ.
SIEM is the wider log store. A SIEM collects logs from almost anything, keeps them for compliance and lets you write your own detections. XDR focuses on the security sources it supports and on response. The two overlap more each year; our XDR vs SIEM guide sets out where each is stronger. The NCSC's device security guidance advises combining on-device logging with monitoring data from network-layer devices, which is the job a SIEM or XDR does once an EDR supplies the endpoint half.
All of them serve the same incident process. NIST SP 800-61 Revision 3 (April 2025) frames incident response through the CSF 2.0 functions, with the aim of improving the efficiency and effectiveness of detection, response and recovery. Map EDR, XDR, SIEM and MDR to who detects, who responds and who recovers, and gaps show up quickly.
Where SenseOn fits
SenseOn describes itself as a unified detection and response platform rather than a traditional EDR. The Universal Sensor is one lightweight agent that captures endpoint, network and identity telemetry on the same device, with network traffic attributed to the process and user that generated it, so there is no second agent and no SIEM needed to stitch those sources together. The platform connects endpoint, network, identity, cloud, email and application signals without per-GB ingestion charges and correlates them into cases. The sensor can run alongside CrowdStrike, Defender or another EDR, so you can add cross-source visibility first and decide about consolidation later. In the AV-Comparatives Business Security Test March-June 2024, SenseOn scored 95.9% real-world protection and 98.7% malware protection with zero false alarms (AV-Comparatives).
Sources
- George Karantzas, Constantinos Patsakis, "An Empirical Assessment of Endpoint Detection and Response Systems against Advanced Persistent Threats Attack Vectors", Journal of Cybersecurity and Privacy, 2021, https://doi.org/10.3390/jcp1030021 (open access preprint: https://arxiv.org/abs/2108.10422)
- Bushra A. Alahmadi, Louise Axon, Ivan Martinovic, "99% False Positives: A Qualitative Study of SOC Analysts' Perspectives on Security Alarms", 31st USENIX Security Symposium, 2022, https://www.usenix.org/conference/usenixsecurity22/presentation/alahmadi
- NIST, SP 800-61 Rev. 3: Incident Response Recommendations and Considerations for Cybersecurity Risk Management: A CSF 2.0 Community Profile, April 2025, accessed 23 September 2026
- NCSC, Device security guidance: logging and protective monitoring, accessed 23 September 2026
- AV-Comparatives, Business Security Test March-June 2024, published 15 July 2024, accessed 23 September 2026
- Microsoft Learn, What is Microsoft Defender XDR?, updated 7 August 2026, accessed 23 September 2026
- Palo Alto Networks, Cortex XDR, accessed 23 September 2026
- TrendAI, Vision One Security Operations, accessed 23 September 2026
- CrowdStrike, Falcon pricing and Falcon Complete Next-Gen MDR, accessed 23 September 2026
- SentinelOne, Singularity pricing, accessed 23 September 2026
- Sophos, Sophos Endpoint, accessed 23 September 2026
How SenseOn writes, checks and corrects its content: editorial standards.
Frequently asked questions
What is the main difference between EDR and XDR?
Scope. EDR collects and acts on telemetry from endpoints only: laptops, desktops, servers and cloud workloads. XDR correlates endpoint telemetry with other sources, such as identity, email, network and cloud, into one incident and can respond across those sources. Most XDR products include an EDR.
Is XDR better than EDR?
Not in every case. XDR is better when attacks you care about cross identity, email and network as well as endpoints, and when you have the licences and staff to connect those sources. A small team with a mainly endpoint risk may get more from a well-run EDR plus a managed service.
Does XDR replace a SIEM?
Sometimes, not always. XDR correlates the security sources it supports for detection and response. A SIEM collects wider logs for compliance, long-term retention and custom detection. Organisations with heavy log retention or audit requirements often keep a SIEM or choose a platform that covers both.
What is the difference between EDR, XDR and MDR?
EDR and XDR are technologies. MDR (managed detection and response) is a service: a provider's analysts watch and respond to alerts from an EDR or XDR on your behalf, usually 24/7. You can buy EDR or XDR with or without MDR.
Do I need EDR if I have XDR?
You need endpoint telemetry either way. Most XDR products include their own EDR agent or take telemetry from an EDR you already run. Check which: an open XDR may rely on your existing EDR, while a native XDR usually expects its own agent.
