The main difference between EDR and XDR
EDR is an approach to detecting, investigating and responding to suspicious activity on endpoints. XDR brings signals from supported security layers together to help establish the scope of an incident. Before choosing a product, identify which systems will actually be monitored.
| Criterion | EDR | XDR |
|---|---|---|
| Focus | Activity on endpoints such as computers and servers. | Combined assessment of supported endpoint, identity, email and application sources. |
| Investigation | Process, file and connection evidence on endpoints. | Related alerts from different layers examined in incident context. |
| Before purchase | Verify operating system, agent, response permissions and license coverage. | Verify integration, licensing and provisioning requirements for each data source. |
An XDR label does not mean that every system is automatically covered. For example, Microsoft Defender XDR correlates signals from products that have been licensed and provisioned. Do not assume that other vendors offer the same coverage. See the official sources.
Which approach should your company evaluate?
The scenarios below are Doz Teknoloji’s proposed assessment framework. They are not customer case studies or product performance tests.
One office with a small IT team
Start by asking how many devices are managed and who will investigate alerts. Where agent deployment, supported operating systems and response responsibilities are clear, EDR coverage can be a starting candidate. Assess email and identity risks separately; company size does not justify leaving these areas outside the assessment.
A company using Microsoft 365 across several locations
Consider an XDR approach if you need to investigate endpoint, user account and email events together. Document which components your existing licenses cover. Using Microsoft 365 does not mean that every security feature is enabled. Review the Microsoft 365 license selection guide and the multi-site security scenario together.
A factory or manufacturing facility
Define separate coverage for office computers, production servers and OT devices. Do not assume that an agent can be installed on a PLC, HMI or vendor-specific system. Confirm vendor support, maintenance windows, rollback and the production impact of isolation before implementation. Separating IT and OT networks should be considered alongside endpoint selection.
What should a pilot test measure before purchase?
Plan a bounded pilot with written success criteria and representative workloads rather than relying on a demonstration. The following checklist is a proposed way to compare quotations against the same scope.
- Inventory: List Windows, Linux and macOS versions, servers, remote workers and existing security products.
- Coverage: Confirm agent installation and data flow on supported devices. Report devices that cannot be enrolled or remain offline separately.
- Workloads: Observe resource use and compatibility while ERP, file sharing, backup and other critical applications are running.
- Alert workflow: Use vendor-supported safe testing methods only in an authorized, isolated test environment. Record alert creation, delivery to the responsible person and investigation steps.
- Response: Verify available actions, approval ownership and rollback on a test device. Do not isolate a production server casually.
- Operations: Identify who will monitor alerts, during which hours and under which escalation plan.
Pilot deliverables: Covered and excluded device lists, observed application impact, an example incident record, response permissions and unresolved requirements. Without these outputs, do not assume that two quotations provide equivalent protection.
What determines EDR/XDR cost?
Do not compare only the per-user or per-device license fee. Doz Teknoloji recommends requesting the following items separately for the same scope and contract period:
- Endpoint and server quantities, including the user/device licensing model.
- Required email, identity and cloud components.
- Agent deployment, integrations, policy configuration and the pilot.
- Alert monitoring, incident investigation, support hours and service scope.
- Data retention, export, exit arrangements and renewal terms.
Licensing, features and platform support vary by vendor and version. Verify current coverage when requesting a quotation. Define SIEM/SOC requirements separately; purchasing an XDR product does not itself establish a contract for 24/7 monitoring. See the SIEM and SOC guide.
Common EDR and XDR questions
Should we immediately remove our existing antivirus?
Verify the vendor’s coexistence requirements and protection modes before migration. Define device groups, rollback and responsible staff during the pilot; avoid a bulk removal that creates a protection gap.
Is XDR mandatory if we already have EDR?
Unresolved requirements should drive the decision. Confirm existing EDR coverage and operations first. Evaluate XDR when investigating identity and email alongside endpoints addresses a real need and the integrations are practical.
Does XDR replace backup?
Keep recovery planning independent of security product selection. Plan separate backup copies, restore tests and continuity targets. The restore testing guide covers the next assessment step.
What should we prepare for a quotation?
Share user, device, server and site counts, operating systems, current licenses, monitoring hours and the target migration date. Passwords, access keys and customer data are not required for the initial discussion.