The short answer
Traditional antivirus commonly emphasizes prevention, including signatures and other detection methods. EDR adds endpoint telemetry, investigation, and configured response actions. The practical difference depends on the products, policies, supported devices, and who owns alerts; neither label guarantees detection or response.
If your IT provider is recommending an upgrade from antivirus to EDR, you need to understand the quoted product and operating model. This article focuses on the business decision. Use the plain-language EDR guide for the broad definition and the EDR-versus-antivirus guide for the feature comparison.
How Traditional Antivirus Works
Traditional antivirus works by comparing files and processes against a database of known malware signatures. When a file is downloaded or a program runs, the antivirus scans it against the database. If it matches a known-bad signature, the antivirus blocks or quarantines it.
This model works reliably against known threats, malware that has already been identified, catalogued, and added to the signature database. The fundamental limitation: it does not work against threats that are new, modified to evade known signatures, or designed to operate without writing malicious files to disk.
Most modern ransomware is specifically designed to evade signature-based detection. Attackers test their payloads against major antivirus products before deployment. By the time your signature database is updated to include a new variant, it has typically already been used in attacks. Relying on legacy antivirus as your primary endpoint defence in 2026 is a meaningful risk.
What EDR Does Differently
Depending on the product and configuration, EDR can collect process, network, file, registry, and other endpoint telemetry. Detection and containment actions vary by platform, operating system, policy, permissions, and endpoint state.
The useful distinction is that EDR can support investigation after initial execution, while traditional antivirus may emphasize prevention. It may alert a team or run configured containment actions, but it does not guarantee that every attack is detected or stopped before damage occurs.
Depending on the product, configuration, retention, and endpoint state, EDR telemetry can help an investigator reconstruct relevant activity. It is not a guarantee of complete evidence or an insurance outcome. North Star can scope managed endpoint detection and response within a wider cybersecurity programme; the proposal defines monitoring and response responsibility.
EDR vs Antivirus: Comparison Table
| Capability | Traditional antivirus | EDR |
|---|---|---|
| Detection method | Known malware signatures | Behaviour and process activity |
| Stops unknown / new malware | Limited | Yes |
| Detects file-less and living-off-the-land attacks | No | Yes |
| Sees attacks in progress (lateral movement) | No | Yes |
| Forensic timeline for investigation | No | Yes |
| Automatic endpoint isolation | No | Yes |
| Meets typical cyber-insurance requirements | Usually no | Usually yes |
The takeaway: antivirus is one feature inside what EDR does. Modern EDR platforms still include signature-based blocking, then add the behavioural detection and response layer on top.
The Managed vs. Unmanaged Problem
EDR with nobody watching it is significantly less valuable than EDR with active monitoring. The product generates alerts. Someone has to investigate those alerts and decide whether they represent real threats or false positives.
For SMBs, the realistic options are:
- MSP-managed EDR, Your managed IT provider receives alerts and investigates them during business hours or 24/7 depending on your plan.
- MDR (Managed Detection and Response), A specialist provider monitors EDR alerts and responds on your behalf, often with a guaranteed response time.
- Unmanaged EDR, The product is installed but alerts go nowhere. This is better than no EDR, but substantially worse than monitored EDR.
When evaluating an IT provider's security offering, ask specifically: who receives EDR alerts, what is the response time, and what does "response" mean?
Cost Comparison
| Control | Typical cost (per endpoint/month) | What it provides |
|---|---|---|
| Legacy AV | $2 - $5 | Signature-based detection of known malware |
| EDR (unmanaged) | $8 - $15 | Behavioural detection; alerts to a console |
| EDR (MSP-managed) | $15 - $25 all-in | Behavioural detection + human review of alerts |
| MDR service | $20 - $40 | 24/7 SOC monitoring + active response |
Microsoft currently documents Defender for Business as an endpoint-security solution based on Defender for Endpoint, and Microsoft 365 Business Premium includes it. Confirm the subscription, supported endpoints, onboarding state, policies, and alert ownership before relying on that entitlement.
Which Should You Have in 2026?
EDR may be appropriate for a BC business that stores client data, handles financial transactions, or has contractual or insurance control requirements. Requirements vary by insurer, policy, environment, and risk profile; confirm the current questionnaire and written terms rather than assuming one product satisfies them.
Endpoint security should be evaluated with identity controls, email security, patching, tested backups, user reporting, and an incident-response plan. The required control set depends on the environment and written obligations.
Talk to a Prince George-based IT team about EDR coverage for your business, call 672-983-1174 or book a free assessment at northstarit.ca.
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Frequently asked questions
Is EDR just a more expensive version of antivirus?
No. Product features overlap, but EDR generally adds endpoint telemetry, investigation, and response workflows. Compare the exact prevention features, supported devices, retention, alert ownership, and response authority in each quote.
Why should a business move to EDR beyond legacy antivirus?
EDR may provide investigation and configured response capabilities that a legacy antivirus product lacks. The decision should follow a risk review and any current contractual or insurance requirements; no product label guarantees compliance, an audit trail, or reduced loss.
Can EDR help with ransomware recovery?
EDR can support detection, investigation, and containment, depending on the product and configuration. Recovery still depends on identity security, backups, restoration testing, incident decisions, and the affected systems; do not treat endpoint isolation or product-specific rollback as a recovery guarantee.
Do I need a 24/7 team to manage an EDR solution?
Not every organization needs the same operating model. Assign clear responsibility for policy maintenance, alert triage, escalation, containment authority, and recovery. If a provider offers managed coverage, confirm its hours, response terms, exclusions, and client responsibilities in the agreement.