EDR for Small Business: What Endpoint Detection and Response Does

Traditional antivirus compares files against a list of known bad programs. That still helps, but modern attacks often use legitimate tools, stolen passwords or brand-new malware that no list has seen yet. EDR, short for endpoint detection and response, watches how programs behave on each computer and can act when something looks wrong.

What EDR does

• Records activity on laptops, desktops and servers so suspicious behavior stands out.
• Flags patterns such as a program encrypting many files at once.
• Lets a security team isolate an affected computer from the network.
• Provides a timeline that helps explain what happened afterward.

EDR is a tool; someone still has to watch it

The software alone does not protect a company if nobody reviews its alerts. That is why small businesses usually choose EDR as part of a managed service, with a team monitoring and responding. Our article on SOC vs MDR explains the difference between watching alerts and actively responding.

Where EDR fits in a layered defense

EDR works best alongside multi-factor authentication, patching, email security and tested backups. No single tool covers everything.

Choosing a provider

Ask which EDR product is used, who reviews alerts, what happens when something is found, and how the service is priced. Endpoint protection is included in our managed plans, with stronger security operations on Platinum.

Related reading

• managed cybersecurity for Portland businesses
• SOC vs MDR for small business
• AI and cybersecurity for small business in 2026

Talk to a local team

PDX Information Technology Services provides managed IT, cybersecurity and compliance support for small businesses in Portland, Lake Oswego, Beaverton, Hillsboro and Vancouver, WA. Plans start at $100 per user per month (Gold) and $180 per user per month (Platinum). Call 971-331-4871 or book a free assessment.