EDR vs XDR vs MDR: Which One Does Your Organization Need?

The difference between EDR, XDR and MDR comes down to three layers of scope: EDR monitors and responds on endpoints only; XDR extends the same detection logic to email, identity, network and cloud telemetry; MDR is a service in which analysts operate those tools on your behalf around the clock. Which one you need depends on your in-house analyst capacity, your attack surface and your compliance obligations.

What Is EDR and What Does It Do?

EDR (Endpoint Detection and Response) is the endpoint security layer that continuously records the processes running on workstations and servers, detects suspicious behavior and applies responses such as killing a process or isolating the device from the network. Gartner analyst Anton Chuvakin defined the category in 2013 as "Endpoint Threat Detection and Response" for tools that detect and investigate suspicious activity on hosts; the name was later shortened to EDR.

Classic antivirus classifies a file before it runs, using signatures or a machine-learning model, and makes a verdict. EDR focuses on what happens after the verdict: a file that looked clean is now running, so what is it doing? An Office document spawning PowerShell, PowerShell connecting to an unknown address and downloading encrypted content, then shadow copies being deleted: each step can look harmless on its own. EDR records the chain as a process tree and evaluates it as a whole.

A typical EDR agent collects process creation and parent-child relationships, network connections, file and registry changes, logon events and in-memory injection attempts. On the response side it offers process termination, file quarantine, network isolation, a remote shell and, in some products, rollback of malicious changes. These capabilities started as a separate module next to endpoint protection (EPP), but by 2026 most vendors ship both in one agent; we discuss where the line between business antivirus and EDR is drawn in our comparison of Bitdefender GravityZone and Trend Micro.

The limit of EDR is its scope. It has no eyes where no agent runs: a phishing email until it lands in the mailbox, a login to Microsoft 365 from a foreign country with a stolen password, or lateral movement started from a printer or IoT device that cannot host an agent all fall outside EDR. For an approach that combines backup and endpoint detection in a single agent, see our article on Acronis Advanced Security + EDR.

What Is XDR? How Does It Differ from EDR?

XDR (Extended Detection and Response) extends the behavioral detection approach of EDR to telemetry from email, identity, network, cloud workloads and productivity applications, and correlates alerts from those sources into a single attack chain. In Gartner's definition, XDR integrates threat intelligence and telemetry from multiple sources with security analytics to provide context and correlation for alerts.

Consider a typical attack chain. An accounts clerk receives a fake invoice email, clicks the link and enters their Microsoft 365 password on a spoofed page. The same night the attacker signs in to that account from another country, adds a mailbox forwarding rule and finally runs a remote command on a server. EDR sees only the last link, the command on the server. XDR joins the phishing alert from the email sensor, the anomalous sign-in from the identity sensor and the command from the endpoint sensor into one incident; the analyst reads a single story instead of five alerts in five consoles.

Two approaches exist. Native XDR combines one vendor's own sensors; it is easy to deploy and correlates well, but ties you to that vendor's portfolio. Open or hybrid XDR ingests data from third-party firewalls, email gateways and identity providers; it is flexible, but maintaining the integrations is your job. All three platforms discussed here are native XDR with third-party integrations; which integrations are covered by a given license should be verified in the vendor's current documentation.

Two caveats matter. First, XDR deployed only on endpoints is just a more expensive EDR; the value appears when additional sensors go live. Second, the Microsoft 365 sensor of an XDR sees an account takeover but does not restore deleted mail or files; our article on why Microsoft 365 backup is a separate layer explains that distinction. When identity signals are combined with device health in a zero trust access model built on ZTNA, XDR correlation becomes even more meaningful.

What Is MDR? Product or Service?

MDR (Managed Detection and Response) is a managed service in which the vendor's or a provider's analyst team operates EDR or XDR tools on your behalf 24/7. Gartner defines MDR as remotely delivered security operations center (SOC) functions: rapid detection, analysis, investigation and response through threat disruption and containment.

What you buy with MDR is not a software module but operational capacity. The service typically includes round-the-clock monitoring of telemetry, alert triage, execution of pre-approved response actions on confirmed incidents, periodic proactive threat hunting and monthly reporting. Some vendors also commit that a named security account manager will contact you within a defined time on a critical incident; that time belongs in the contract.

MDR is often confused with a traditional managed security service provider (MSSP). MSSPs historically focus on log collection, device management and alert forwarding: they send you the alert, you make the decision. MDR investigates the alert, validates it and responds within its mandate. When reading a contract, check four clauses: the limit of response authority (under which conditions isolation, account lockout or process termination is automatic), the target time for triage, the time zone and language of the analysts, and the country where telemetry is stored. In our projects the clause debated longest is always the pre-approved response list: isolating a production server at midnight is a lifesaver for one organization and a production outage for another.

EDR vs XDR vs MDR Comparison Table

Comparing EDR, XDR and MDR works along four axes: scope (endpoint only or multi-source), operator (your team or external analysts), form of response (provides tools or takes the action) and required in-house staff. The table below places the three approaches side by side on those axes.

The most critical row is "required in-house staff". In our field experience the common cause of failed EDR projects is not the product but the absence of anyone watching the alert queue. Hundreds of alerts waiting for review in the console are the clearest sign that the organization actually needs MDR.

Which Organization Profile Needs Which?

Choosing between EDR, XDR and MDR by organization profile depends on three variables: the number of users and servers, whether staff exist in-house who can investigate security alerts, and the attack surface beyond the endpoint (cloud email, multiple sites, production networks). The table gives a starting recommendation for six typical profiles; the final decision is made in a discovery session.

SMB Dilemma: Build a 24/7 SOC or Buy MDR?

An in-house 24/7 SOC for an SMB is rarely realistic: continuous monitoring needs at least five analysts on rotating shifts, a SIEM platform, ongoing training and cover for staff turnover. MDR delivers the same function through a shared analyst pool on a subscription model, which is why organizations below a few hundred users usually choose MDR or managed EDR.

The cost drivers are clear regardless of amounts: shift staffing including nights and weekends, analyst certification and training, SIEM and threat-intelligence subscriptions, continuous tuning of detection rules, and the risk of losing experienced people. At SMB scale the sum of those items almost always favours a per-user MDR subscription.

The threat picture supports the same conclusion. According to Verizon's 2025 Data Breach Investigations Report, ransomware was present in 44 percent of the breaches analysed, rising to 88 percent among small and medium-sized organizations (Verizon DBIR 2025). Ransomware typically starts encrypting outside office hours; whether someone sees the alert at 2 a.m. and isolates the device decides the entire picture you face in the morning. We cover this end to end in our 10-step ransomware defence plan for SMBs.

MDR has trade-offs too: the external team knows your business processes less well, response authority is limited by contract and vendor dependency grows. In practice the model that works best is hybrid: MDR handles 24/7 monitoring and first response, the in-house IT owner acts as escalation contact and approves actions that require a business decision.

Options in the Sora Portfolio: FortiEDR, GravityZone XDR/MDR and Trend Vision One

The three platforms in the Sora Yazılım portfolio represent three architectural choices: FortiEDR is an endpoint-centric EDR/XDR integrated with the Fortinet Security Fabric; Bitdefender MDR is a service that can be added on top of GravityZone XDR; Trend Vision One brings endpoint, email, network, cloud and identity sensors together with attack surface risk management in one console. None is absolutely superior; the choice follows your existing infrastructure.

FortiEDR combines pre-execution machine-learning antivirus with post-infection behavioral blocking in one lightweight agent; coverage, according to Fortinet, of legacy operating systems back to Windows XP and Server 2003 as well as POS and manufacturing controllers with the same agent, and playbook-driven automated response are its distinguishing features. In an organization running FortiGate, FortiAnalyzer and FortiSwitch, endpoint telemetry appears in the same Security Fabric plane as network events, which provides network-side visibility for devices that cannot host an agent. Fortinet offers a managed detection service option for FortiEDR; we recommend verifying its current scope in Fortinet's documentation.

Bitdefender GravityZone XDR adds network, identity (Active Directory, Entra ID), productivity (Microsoft 365, Google Workspace) and cloud (AWS, Azure, GCP) sensors next to the endpoint EDR sensor and merges incidents into one chain. Bitdefender MDR, layered on the same console, provides 24/7 monitoring, managed threat hunting and pre-approved response actions from the vendor's analyst team. For SMBs without an in-house security team that want product and service from one vendor, this is a natural path.

Trend Vision One collects telemetry from native sensors for endpoints and servers, cloud workloads, email, network and identity, together with third-party sources, in one data layer. Next to XDR it adds attack surface risk management and automation, so it shows which asset is most at risk before an incident, not only after one. That breadth pays off in organizations with an existing SIEM and SOC environment and many servers and cloud workloads; the vendor's managed service option runs on the same platform.

As an independent solution partner we handle sizing, licensing, deployment, migration and managed operations for all three platforms. The first question in our discovery session is never which product, but who will look at the alerts; the product is chosen after that answer.

Eight Questions to Answer Before You Decide

Before deciding on EDR, XDR or MDR you need clear answers to eight questions; the answers determine both the layer and the contract clauses. This list is a simplified version of the framework we use in discovery sessions.

1. Who will look at the alerts? If no named person exists for office hours and after hours, the answer is MDR.
2. What beyond the endpoint must be protected? Microsoft 365, an identity provider or cloud workloads bring XDR sensors into play.
3. Are there devices that cannot host an agent? Production lines, medical devices or legacy operating systems require a network sensor or legacy OS support.
4. Which vendor supplies your firewall and SIEM? Native integration needs less maintenance than third-party integration.
5. Would automatic isolation break business continuity? Define an exception list and an approval flow for production servers.
6. How many months of logs and incident records must be kept? Data protection law and sector rules set retention; verify current legislation and official guidance.
7. In which country will telemetry be processed? Data location and the subcontractor list belong in the contract.
8. What is the exit plan? Agent removal and data handover at contract end should be written down from the start.

Frequently Asked Questions

Does EDR replace antivirus?

Most EDR products today include a pre-execution antivirus layer, so a separate antivirus is not required. Add-ons sold purely as an "EDR module", however, sit on top of existing endpoint protection; verify which layers a license covers on the vendor's product page.

Do I need EDR before XDR?

No, but the core of XDR is always the endpoint sensor. On all three platforms XDR is built by adding email, identity, network and cloud sensors on top of the EDR agent, so starting with EDR and moving to XDR is possible through a license upgrade.

What is the difference between MDR and an MSSP?

An MSSP traditionally offers log collection, device management and alert forwarding; you make the decision. MDR investigates the alert, validates it and responds within the mandate defined in the contract. The distinction is not in the service name but in the response clause.

I already have a FortiGate firewall. Do I need XDR?

FortiGate sees the network side, not process behavior on the endpoint. You need at least EDR; with FortiEDR, network and endpoint events merge in one plane through the Security Fabric. If Microsoft 365 and identity signals must also be protected, XDR sensors come into play.

Can an MDR provider isolate my device without my permission?

Only if the action is on the pre-approved list in the contract. A good MDR contract states which assets may be isolated automatically, which require approval and which are on the exception list; production servers are usually placed in the approval-required group.

Does MDR telemetry leave the country under data protection law?

It may, depending on where the vendor's SOC is located. Because telemetry can contain personal data, the data location, subcontractor list and legal basis for transfer must be written into the contract. Verify your organization's obligations against current legislation and the official guidance of the Turkish data protection authority (KVKK).

At how many users does XDR make sense?

Attack surface matters more than headcount. XDR is meaningful for a 50-user organization with Microsoft 365, several sites or cloud workloads, while EDR may be enough for a 300-user organization protecting only workstations at a single location.

Conclusion

EDR sees the endpoint; XDR sees the endpoint together with email, identity, network and cloud; MDR supplies the people who operate that visibility 24/7. The decision starts with operations, not products: who will look at the alerts, what beyond the endpoint must be protected, and are there devices that cannot host an agent. Those three answers set the layer; the choice among FortiEDR, Bitdefender GravityZone XDR/MDR and Trend Vision One then follows from your existing firewall, your SIEM investment and your team's capacity.

If you would like to clarify which layer your organization needs and the factors that shape a quote, contact us for a free discovery session; we review your current infrastructure and prepare a neutral sizing proposal across the three platforms.