For years, “Do you have antivirus?” was the only security question most small businesses were asked. Today, cyber insurance applications, compliance questionnaires, and IT providers are asking something different: “Do you have EDR?”

If you’re not sure what the difference is, or whether your business needs it, this guide breaks it down in plain language.

What traditional antivirus does

Traditional antivirus works a lot like a “most wanted” list. It keeps a library of known malicious files, called signatures, and checks the files on your computer against that list. If something matches, it blocks or quarantines it.

That approach still has value. It stops a lot of common, well-known malware. But it has a built-in weakness: it mostly catches threats that have already been seen and catalogued.

Why antivirus alone isn’t enough anymore

Attackers know how signature-based tools work, so they design attacks to slip past them:

  • New and modified malware. Small changes to malicious code can create a version no signature list has seen yet.
  • Attacks that don’t use obvious malware. Many attacks use legitimate tools already built into Windows, such as scripting tools and remote management features, to do their damage. There’s no “bad file” to catch.
  • Ransomware that moves fast. Once ransomware starts encrypting files, every minute counts. By the time a new variant is added to a signature list, the damage may already be done.
  • Stolen passwords. If an attacker logs in with a real employee’s credentials, antivirus may see nothing unusual at all.

What EDR does differently

EDR stands for Endpoint Detection and Response. An “endpoint” is any device that connects to your network, such as laptops, desktops, and servers.

Instead of only asking “Is this file on the bad list?”, EDR asks “Is this device behaving suspiciously?” It continuously watches activity on each device and looks for warning signs, such as:

  • A program suddenly encrypting large numbers of files
  • An Office document launching a hidden script
  • Unusual attempts to disable security tools or delete backups
  • Processes behaving in ways that match known attack techniques

When EDR spots something, it can respond automatically: stopping the process, isolating the infected computer from the network so the threat can’t spread, and giving technicians a detailed timeline of what happened. Some EDR platforms can also help reverse changes made by an attack on supported systems.

EDR vs. managed EDR (MDR)

EDR is a powerful tool, but it generates alerts, and someone has to look at them. That’s where managed detection and response (MDR) comes in. With a managed service, security professionals monitor and investigate alerts, often around the clock, and escalate real threats.

For most small and mid-size businesses, the right answer isn’t just buying EDR software. It’s having EDR and someone watching it.

Does a small business really need EDR?

In most cases, yes. A few reasons:

  • Small businesses are frequent targets. Attackers often assume smaller organizations have fewer defenses.
  • Cyber insurance. Many insurers now ask whether you use EDR when you apply for or renew coverage.
  • Compliance. Healthcare practices, financial offices, and others handling sensitive data are expected to have strong safeguards in place.
  • Downtime is expensive. Even a few days without access to your files, email, or systems can cost far more than prevention.

EDR is one layer, not the whole plan

No single product stops every attack, and anyone who promises otherwise isn’t being straight with you. EDR works best as part of a layered approach:

  • Multi-factor authentication (MFA) to protect against stolen passwords
  • Email security to block phishing before it reaches your team
  • Regular patching to close known security holes
  • Backups that are protected and tested, so you can recover if something gets through
  • Staff awareness so employees can recognize suspicious messages

Questions to ask your IT provider

  • Are our computers protected by EDR, or only traditional antivirus?
  • Who monitors the alerts, and is that coverage 24/7?
  • What happens if a threat is detected after hours?
  • Is MFA turned on for email and remote access?
  • When were our backups last tested?

How CTS approaches endpoint security

At Creative Tech Solutions, managed endpoint security is part of a layered cybersecurity approach. Where it’s included in a client’s agreement, we use SentinelOne Complete for EDR, combined with email security, identity protection, patching, and backup, and supported by a 24/7 security operations partner.

Not sure what’s protecting your computers today? Schedule a free consultation and we’ll review your current setup and explain your options in plain English. You can also learn more about our cybersecurity services.