EDR vs. Antivirus: What MSPs Need to Know
Antivirus is dead. EDR is the new standard. Here's what every MSP needs to understand about endpoint detection and response.
Traditional antivirus relies on signature-based detection — it compares files against a database of known malware signatures. The problem? New malware variants are created at a rate of over 500,000 per day. Signature-based detection simply cannot keep up.
What EDR Actually Does
Endpoint Detection and Response (EDR) takes a fundamentally different approach. Instead of just looking at files, EDR monitors everything happening on an endpoint in real time: process execution, file system changes, network connections, registry modifications, and more. It uses behavioral analysis to detect suspicious activity patterns, even if the specific malware has never been seen before.
When EDR detects something suspicious, it doesn't just alert — it can respond. Isolate the host from the network. Kill the malicious process. Quarantine the suspicious file. Roll back changes. All automatically, in seconds, before the threat can spread laterally.
Application Allowlisting: The Next Level
The most advanced EDR platforms go beyond detection and response to include application allowlisting — also known as application control. Instead of trying to detect everything bad (an impossible task), allowlisting only permits known-good applications to run. Everything else is blocked by default.
This is the same approach that ThreatLocker pioneered, and it's incredibly effective against ransomware, zero-day exploits, and fileless malware. When combined with ringfencing (restricting what approved applications can do) and storage control (managing USB and peripheral access), you get defense-in-depth at the endpoint level.
Why MSPs Should Care
For MSPs, the shift from antivirus to EDR isn't optional — it's a requirement driven by both cyber insurance and client expectations. Most cyber insurance policies now explicitly require EDR (not just antivirus) as a condition of coverage. Clients who are evaluating MSPs will ask about your endpoint security stack, and "we run antivirus" is no longer an acceptable answer.
The good news: modern EDR platforms designed for MSPs include multi-tenant management, per-client policies, and integration with your RMM and ticketing systems. When EDR is built into your unified platform rather than bolted on as a separate tool, deployment and management become dramatically simpler.