EDR stands for Endpoint Detection and Response. It's a category of cybersecurity tools that continuously monitor computers, laptops, servers, and mobile devices (called endpoints) for malicious behaviour, unusual activity patterns, and security breaches.
Unlike traditional antivirus software that relies mainly on signature-based detection (matching known malware patterns), EDR uses behavioural analysis and machine learning to spot novel threats and attack methods. When suspicious activity occurs, EDR tools can automatically quarantine files, block processes, disconnect devices from the network, or alert your IT team for manual investigation.
Why EDR matters: Modern cyberattacks often bypass conventional antivirus defences. EDR gives you visibility into what's actually happening on your devices in real time, and the ability to respond quickly. This is especially critical for businesses handling sensitive data.
Common features include:
- Real-time process monitoring and file analysis
- Automatic threat isolation and remediation
- Forensic investigation tools to trace how an attack happened
- Integration with other security systems
- Centralised dashboards across all company devices
Practical considerations: EDR requires active management - it generates alerts that skilled staff need to review. Poorly tuned EDR can produce false positives that overwhelm your team. Most EDR solutions charge per device per month, so costs scale with your number of endpoints. Performance impact on older hardware can be noticeable.
EDR is standard practice for organisations handling customer data or critical infrastructure, but smaller businesses should weigh licensing costs against their actual security needs and staff capacity to manage alerts.