EDR vs antivirus: is traditional antivirus still enough?

EDR (endpoint detection and response) is a security layer that continuously records what happens on every computer and server, watches behaviour rather than files to catch suspicious activity, and can cut an infected machine off the network when it sees an attack. The core difference from classic antivirus is simple: antivirus stops known malicious files at the gate by matching signatures, while EDR catches what gets through and responds before it spreads. The short answer to the question in the title: antivirus is still a necessary baseline, but on its own it is no longer enough. According to CrowdStrike's 2025 Global Threat Report, 79% of the attacks detected in 2024 used no malicious file at all, exactly the kind of thing a signature scanner cannot see. The two are complementary, not rivals.

How antivirus works, and why it falls short

Classic antivirus rests on a signature database: it keeps a fingerprint of every known piece of malware and blocks any file that matches. Against known threats it is fast and cheap. But attackers have spent years going around this model. The most common approach today is the fileless attack: the malicious code runs directly in memory without ever touching the disk, or it abuses the system's own legitimate tools such as PowerShell and WMI (living off the land). There is no file for a signature to match. In CrowdStrike's data, the share of malware-free detections rose from 40% in 2019 to 79% in 2024. And attackers often skip cracking passwords altogether; they log in as a legitimate user with stolen credentials, and antivirus reads that login as perfectly normal.

What EDR actually does

EDR asks a different question. Not "is this file malicious?" but "is what is happening on this machine normal?" It continuously records processes, network connections, registry changes and file activity on every endpoint, then looks at behaviour. Why did a Word document launch a PowerShell command? Why is one user account encrypting hundreds of files in a row at 3 a.m.? None of those is a malicious file on its own, but as a pattern it looks like an attack. When EDR sees such a pattern it does more than raise an alert; most platforms can respond automatically, most typically by isolating the affected machine from the network to stop lateral movement. The recording matters just as much: after an incident you can trace backwards exactly which steps the attacker took, which in a ransomware case is half the recovery.

Why speed decides everything

The real reason to move from antivirus to EDR is time. CrowdStrike's "breakout time", the average it takes an attacker to jump from the first machine they land on to the rest of the network, fell to 48 minutes in 2024, and the fastest jump they observed was just 51 seconds. In that window, catching up by hand is usually impossible. If a prevention layer alone were enough, EDR would be unnecessary, but something always slips inside, and at that moment what counts is how fast you can see it and stop it. EDR's automatic isolation exists precisely to shrink those 48 minutes.

EPP, NGAV, EDR, XDR, MDR: cutting through the jargon

The market has turned this space into alphabet soup, and separating a few terms makes the choice easier. EPP (endpoint protection platform) is the prevention layer, and today it usually includes NGAV (next-generation antivirus), which tries to stop unknown malware too, using machine learning and behavioural analysis instead of signatures. EDR adds detection and response on top of that. XDR (extended detection and response) does not stop at the endpoint; it pulls email, network, identity and cloud into a single console. MDR (managed detection and response) is not a technology but a service: an outside security team watching your EDR around the clock. Most modern products bundle NGAV and EDR into a single agent, so the "antivirus or EDR" dilemma has in practice become "both in one."

Buying EDR is not enough, someone has to watch it

This is where the most common mistake lives. EDR is not a set-and-forget product; it produces a steady stream of alerts, and someone has to investigate them. In a small company with no IT team, or a team of one, the console fills up but nobody looks, and the single critical alert gets lost among hundreds of low-priority ones. That is why for many SMEs an MDR service makes more sense than EDR alone: you deploy the agent, and an expert team takes on the monitoring and the 2 a.m. decision to isolate a machine. Buying EDR with no one behind it to read it is like installing a security camera you never watch.

The right choice for your company

Budget is usually less of an obstacle than people assume; EDR and NGAV licences today typically run from a few dollars to the mid-teens per endpoint per month. When you choose, look at a few things: does the product give you NGAV prevention and EDR detection in a single agent; does it offer automatic isolation and rollback against ransomware; is there an MDR option to watch the alerts for you; and how long are the collected logs kept (important for looking back after an incident). Endpoint security is not a standalone fix but one part of a zero trust approach; it only makes full sense alongside your identity, device and access layers.

Replacing antivirus with EDR is less a product swap than accepting a fact, that something will get inside, and preparing for it. At Wedevit we review your current endpoint protection, flag the machines still relying on signature-only antivirus, design the EDR or MDR model that fits the size of your business, and configure automatic isolation rules for the ransomware scenario. The concrete first step is to write down which protection actually runs on your servers and critical workstations today, and who looks at those alerts.