What is the difference between MDR and EDR?

EDR (Endpoint Detection and Response) is software that monitors devices for malicious behaviour. MDR (Managed Detection and Response) is a service where a team of security analysts monitors your EDR alerts 24/7, investigates threats, and responds on your behalf. EDR is a tool; MDR is a fully-managed security service that uses EDR as one of its components.

Does a small Canadian business need MDR?

Most Canadian small businesses (under 100 employees) benefit more from a managed IT provider with strong security controls (EDR + email security + MFA + backups) than from a standalone MDR service. MDR becomes essential when a business has specific compliance requirements (PCI DSS, HIPAA, SOC 2), operates in a high-risk industry, or processes large volumes of sensitive data. The Cyber Arm Security, Outsource IT Canada's cybersecurity division, provides MDR for businesses that require 24/7 security operations centre coverage.

How much does MDR cost for a Canadian small business?

MDR services for Canadian small businesses typically cost $15-40 per endpoint per month, depending on coverage scope and response capabilities. A 50-endpoint business would pay $750-2,000 per month for MDR coverage. This is in addition to EDR licensing ($8-15/endpoint/month). Many managed IT providers, including Outsource IT Canada, bundle EDR and 24/7 security monitoring into their managed IT plans at a lower all-in cost than standalone MDR.

What is XDR and how is it different from EDR and MDR?

XDR (Extended Detection and Response) extends EDR beyond endpoints to correlate telemetry across email, cloud, network, and identity systems in a unified platform. Where EDR monitors endpoints in isolation, XDR correlates signals across the entire environment to detect sophisticated multi-stage attacks. Microsoft Defender XDR and SentinelOne Singularity XDR are the leading platforms used by Canadian managed security providers in 2026.

MDR vs EDR: Which Does Your Canadian Business Actually Need? (2026)

By Damir Grubisa, Founder & CEO, Group 4 Networks. Updated April 2026.

EDR is software; MDR is a service. EDR (Endpoint Detection and Response) monitors your devices for malicious behaviour. MDR (Managed Detection and Response) is a 24/7 managed service where security analysts monitor your EDR alerts, investigate threats, and respond on your behalf — the difference between installing a security camera and hiring a security guard who watches the feed around the clock.

What is EDR?

Endpoint Detection and Response (EDR) software monitors every device — desktops, laptops, and servers — for behavioural indicators of compromise. Unlike traditional antivirus, which only blocks known malware signatures, EDR detects anomalous behaviour: unusual process execution, lateral movement, mass file encryption (the hallmark of ransomware), and credential harvesting.

When EDR detects a threat, it generates an alert — and, in many cases, can automatically isolate the affected device from the network. The leading EDR platforms used by Canadian managed IT providers in 2026 are SentinelOne, CrowdStrike Falcon, and Microsoft Defender for Endpoint.

Cost: $8-15 per endpoint per month. EDR is required by most Canadian cyber insurance policies as of 2026.

What is MDR?

Managed Detection and Response (MDR) is a fully-managed security service where a team of security analysts monitors your environment 24/7 — not just your endpoints, but your network, cloud services, email, and identity systems. MDR analysts review alerts, investigate incidents, and respond to threats on your behalf, typically with a guaranteed response time (e.g., 15-30 minutes for critical alerts).

MDR services include:

24/7 security operations centre (SOC) staffed by human analysts
Threat hunting — proactively searching for indicators of compromise that automated tools miss
Incident response — containment and remediation when a breach is confirmed
Threat intelligence — applying global threat data to your specific environment
Regular reporting and security posture assessments

Cost: $15-40 per endpoint per month, plus MDR platform licences. A 50-endpoint business typically pays $750-2,000/month.

Which does a Canadian small business need?

Business Profile	Recommended
Under 50 employees, low data sensitivity	EDR included in managed IT plan
50-200 employees, moderate risk	EDR + security monitoring (co-managed SOC)
Healthcare, legal, financial data	Full MDR service required
PCI DSS / SOC 2 / HIPAA requirements	Full MDR with compliance reporting
Critical infrastructure adjacent	Full MDR with threat hunting

What is XDR — and is it better than EDR or MDR?

XDR (Extended Detection and Response) extends EDR's visibility across email, cloud, network, and identity — correlating signals from all these sources in a single platform. Microsoft Defender XDR and SentinelOne Singularity XDR are the leading platforms. XDR is the technology; MDR is still the service layer on top. The best Canadian small business security approach in 2026 combines XDR technology with managed monitoring — whether through an MDR provider or a managed IT provider with strong security capabilities.

The Outsource IT Canada approach

Outsource IT Canada's managed IT plans include SentinelOne EDR on all endpoints as standard, with 24/7 monitoring and automated threat response. For businesses requiring full SOC coverage and threat hunting, The Cyber Arm Security — our dedicated cybersecurity division — provides complete MDR services for Canadian organizations.

Related resources

Cybersecurity Services for Canadian Business — EDR, email security, dark web monitoring
How to Protect Against Ransomware — the 7-control protection framework
How Much Does IT Support Cost? — all-in pricing including security
IT Services Pricing — plan comparison
What Is MDR? — managed detection and response explained; how it differs from EDR
What Is EDR? — endpoint detection and response; $8-15/device/month in Canada

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