If your IT provider is recommending an upgrade from antivirus to EDR, you want to understand what you're paying for. This post explains the difference in plain language, what each product actually does at a technical level, and why the gap between them has become more significant over the past several years.
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
Endpoint Detection and Response (EDR) continuously monitors behaviour on the endpoint rather than scanning files against a signature database. It records what processes run, what network connections are made, what files are written or read, and what registry keys are modified. When a pattern of behaviour looks suspicious, even from a legitimate-looking process using legitimate Windows tools, EDR flags it for investigation or automatically contains the endpoint.
This is the key difference: EDR detects attacks in progress, not just at the point of initial infection. If an attacker gains access through a phishing email and begins moving laterally through the network, EDR sees the behaviour pattern and can alert your IT team or automatically isolate the endpoint before the attack progresses further.
EDR also maintains a forensic timeline. When an incident occurs, your IT team (or an incident response firm) can see exactly what happened: which process did what, in what order, and what it touched. This is critical for understanding the scope of an incident and for insurance claims.
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 Defender for Business, included in M365 Business Premium, provides enterprise-grade EDR functionality. If you're already on Business Premium, you have EDR capability. The question is whether it's configured correctly and whether someone is monitoring alerts.
Which Should You Have in 2026?
For any BC business that stores client data, handles financial transactions, or is subject to cyber insurance requirements: EDR is the baseline. Legacy antivirus does not satisfy cyber insurance questionnaire requirements and does not protect against the threats that generate the large claims.
The minimum viable endpoint security stack in 2026 is EDR (managed), MFA on all accounts, and patched operating systems. Everything else is additive to that foundation.
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.
Still running legacy antivirus?
North Star can assess your current endpoint protection and migrate you to managed EDR as part of a cybersecurity plan. Get a free security assessment.
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Frequently asked questions
Is EDR just a more expensive version of antivirus?
Not exactly. While antivirus is a tool that scans for known malware, EDR is a comprehensive system that monitors device behaviour. It identifies suspicious patterns even if the specific file is unknown. For businesses in cities like Kelowna or Whitehorse, EDR provides the necessary oversight to stop advanced threats that traditional antivirus tools would simply miss, making it a more robust investment for long term security.
Why should a business move to edr beyond legacy antivirus?
Legacy antivirus tools rely on databases of known threats. If a threat is new or modified, it bypasses the scanner. Moving to EDR allows your organisation to detect lateral movement and data exfiltration attempts. Many cyber insurance providers in Canada now require EDR because it provides a detailed audit trail of any incident, which is critical for meeting modern compliance standards and reducing financial risk.
Can EDR help with ransomware recovery?
Yes, EDR is significantly more effective against ransomware. Many EDR solutions offer rollback capabilities, which can restore files to their previous state if they are encrypted. Furthermore, EDR can isolate infected devices from the rest of your network automatically, preventing the spread of the attack. This proactive isolation is a key differentiator when comparing edr vs antivirus for business continuity planning.
Do I need a 24/7 team to manage an EDR solution?
EDR generates a large amount of data and alerts that require professional interpretation. For most SMBs in Western Canada, managed EDR through Northstar IT is the most cost effective path. Our 24/7 helpdesk and security experts monitor your endpoints around the clock, ensuring that threat signals are investigated and remediated immediately without requiring you to hire internal security analysts.