EDR vs. Traditional Antivirus: What Growing Companies Are Actually Buying

Most companies under 200 employees are running antivirus software nobody has thought about since it was installed. It still shows a green checkmark. It still quarantines the occasional obvious virus. What it increasingly cannot see is the kind of attack actually landing on small and midsize companies right now: one that never drops a traditional file at all, so there is nothing for a signature database to match against.

Why "It's Still Running" Isn't the Same as "It's Still Working"

Traditional antivirus works by comparing files on a device against a database of known malware signatures. That approach worked reasonably well when most attacks arrived as a file: an infected attachment, a malicious download, a corrupted installer. It does very little against an attacker who never installs a file in the first place.

That shift is no longer a fringe case. According to CrowdStrike's 2026 Global Threat Report, 82% of detections in 2025 were malware-free, meaning the attacker used legitimate tools already present on the system, like PowerShell, remote management software, or built-in admin utilities, instead of dropping malware a signature scanner could catch. Signature-based antivirus is not built to flag "someone is using a legitimate admin tool in a way that doesn't match normal behavior." It is built to flag "this file matches a known bad file." Those are different problems, and the second one is now the more common attack pattern.

What EDR Actually Does Differently

Endpoint Detection and Response (EDR) does not primarily ask "does this file match something bad we already know about." It asks "does this behavior look like an attack, regardless of whether we've seen this exact technique before." EDR continuously monitors process activity, network connections, and system changes on a device, flags patterns consistent with an intrusion, and keeps a detailed record of what happened.

The practical difference shows up after something is flagged. Traditional antivirus quarantines or deletes a matched file and stops there. EDR gives a responder the ability to isolate the affected device from the network, see exactly what the process touched, and in many cases roll back changes, all before the incident spreads to a second machine. That containment step, not just the detection itself, is the actual value EDR adds over antivirus alone.

The Risk Profile That Makes This Matter More at This Size, Not Less

It is tempting to assume advanced detection tooling is an enterprise problem. The data says the opposite. Verizon's 2025 Data Breach Investigations Report found that ransomware was present in 88% of breaches at small and midsize businesses, compared with 39% at large organizations. Smaller companies are not attacked less; they are attacked with a technique that is disproportionately effective against them, in part because they are less likely to have anything watching for it.

Speed compounds the problem. The same CrowdStrike report that tracked the shift to malware-free attacks also found that the average eCrime breakout time, the time between an attacker's initial access and their first attempt to move laterally to another system, fell to 29 minutes in 2025. A security tool that only alerts someone during business hours, or that generates an alert nobody is actively watching, can lose the entire window before a human ever sees it.

Traditional Antivirus vs. EDR vs. Managed EDR

The three options are not interchangeable, and the gap between them is less about the software license and more about who is actually watching what it finds.

Capability	Traditional Antivirus	EDR, Self-Monitored	EDR, Managed
Detection method	Known file signatures	Behavior and process analysis	Behavior and process analysis
Catches malware-free attacks	Rarely	Yes, generates an alert	Yes, alert is investigated
Who acts on an alert	No one, by design	Whoever checks the console	A monitoring team, continuously
Typical cost per device, per month	$2-5	$5-15	$30-100+, bundled with monitoring

Licensing an EDR product is the easy part. Microsoft, for example, prices Defender for Business as a $3 per user, per month standalone add-on, or bundled into Microsoft 365 Business Premium at $22 per user, per month. Other major EDR platforms list in a similar $5 to $15 per endpoint range depending on tier. The license alone answers "can this device generate an alert." It does not answer "will anyone act on it in less than 29 minutes."

What This Actually Costs at 25-200 Employees

Run the numbers for a representative 60-person company with roughly 70 managed devices. Unmonitored EDR licensing lands around $350 to $1,050 a month, a modest increase over legacy antivirus. Add continuous monitoring, the piece that turns an alert into an actual response, and current market pricing for managed detection puts the same environment at roughly $2,100 to $7,000 a month depending on coverage hours and scope.

That is a real range, not a rounding error, and it explains why so many growing companies license EDR and stop there: the software line item is affordable, the monitoring line item is the part that gets deferred. The problem is that the software without the monitoring delivers a small fraction of the protection, because an EDR alert nobody reads behaves almost exactly like no alert at all.

EDR Alone Is Not a Security Program

This is the gap that matters most for a company this size. EDR is a detection tool, not a decision. Someone still has to determine, at 2 a.m. or on a Saturday, whether a flagged behavior is a real intrusion or a false positive, and act on that judgment inside a shrinking response window. A company that buys EDR licenses and assumes the tool itself is "handling security" has bought visibility without response, which is a meaningful improvement over nothing but far short of what the tool is capable of.

This does not mean EDR should replace whatever IT support or managed service relationship is already in place. It means the relevant question is not "do we have EDR," it is "who is watching what it finds, and how fast do they act." For many growing companies, that oversight question sits alongside broader ones, like whether device management, patching, and access controls are consistent across the fleet, not just whether an endpoint agent is installed.

A Four-Question Framework for Evaluating What You Already Have

Before signing a new EDR contract or assuming the antivirus already deployed is sufficient, four questions separate a real security posture from an assumed one.

Is the current tool signature-based, behavior-based, or both? Ask the vendor or provider directly, in those terms. "Next-generation antivirus" is sometimes behavior-based EDR under a different name and sometimes signature-based antivirus with a modern interface. The label alone does not answer the question.
Who receives an alert when one fires, and on what schedule? An alert that lands in an inbox nobody checks after 6 p.m. provides a false sense of coverage. Get a specific answer: a named team, a defined response time, and whether that coverage is 24/7 or business hours only.
What happens between detection and containment? A tool that only alerts, without the ability to isolate a device or roll back a change, still leaves the actual response work to a human working from scratch. Confirm whether isolation and rollback are available and who is authorized to use them.
Does this decision currently sit with anyone? In many growing companies, endpoint security tooling was chosen once, years ago, by whoever was setting up IT at the time, and has not been revisited since. If no one owns this decision today, that is itself the finding worth acting on.

A company that can answer all four questions with specifics has a real security posture. A company that cannot has a licensing decision it has been treating as a security decision.

Where This Fits at Elevaire

Elevaire's Foundation IT service is built around that oversight gap: proactive monitoring, a defined help desk, and a security baseline that gets enforced consistently rather than assumed. Foundation IT does not replace an organization's existing IT provider or managed service relationship; it adds the layer of monitoring and accountability that keeps tools like EDR from becoming an unread alert queue. Organizations dealing with a specific compliance driver behind the EDR conversation, like cyber insurance underwriting or a client security questionnaire, typically pair this with Elevaire's Compliance & Security work rather than treating it as a separate project.

Frequently Asked Questions

How much does EDR actually cost for a company our size?

For a company with 50 to 100 devices, expect EDR licensing alone to run roughly $250 to $1,500 a month depending on the platform and tier. Add continuous monitoring, which is what actually turns a detection into a response, and total cost typically lands between $1,500 and $10,000 a month depending on coverage hours, device count, and how much of the response work is handled for you versus by your own team.

Do we need EDR if we already have an MSP or IT provider?

Possibly, and it depends on what your current provider includes. Many managed service agreements include basic antivirus but not true behavior-based EDR with continuous monitoring. Ask specifically whether your current provider monitors EDR alerts around the clock or only during business hours, and whether that monitoring is included or billed separately. EDR and continuous monitoring are meant to work alongside your existing IT relationship, not replace it.

Is licensing EDR enough, or do we need someone actively watching it?

Licensing alone is not enough. EDR generates alerts; it does not resolve them. Without a team actively monitoring and responding to what it flags, most of the tool's value goes unused, particularly given how quickly attackers now move after initial access. Treat monitoring as a required companion to the license, not an optional upgrade.

Does EDR replace antivirus entirely, or does it run alongside it?

Modern EDR platforms typically include next-generation antivirus capability built in, so most companies replace standalone legacy antivirus with an EDR platform rather than running both. Confirm this specifically with whatever platform you're evaluating, since some are EDR-only and expect to sit alongside a separate antivirus product.

What's the actual difference between EDR and MDR?

EDR is the underlying technology: the software that monitors endpoint behavior and generates alerts. MDR (Managed Detection and Response) is a service built on top of that technology, where a team actively monitors those alerts and responds on your behalf. Buying EDR without MDR, or an equivalent internal monitoring capability, is buying the sensor without the person watching it.

How do we get started evaluating whether we need this?

Start by asking your current IT provider three questions: what endpoint protection is currently deployed, whether it includes true behavior-based detection or signature-based antivirus only, and who is monitoring alerts outside business hours. The answers to those three questions will tell you whether this is a licensing gap, a monitoring gap, or something you already have covered.