The quick answer: Traditional antivirus software detects and removes known threats based on a database of recognised malware signatures. Endpoint Detection and Response (EDR) goes significantly further, monitoring device behaviour continuously, detecting threats that don’t match known signatures, and enabling rapid investigation and response when something suspicious occurs. For most growing SMEs handling client data or operating in regulated sectors, EDR provides a meaningfully higher level of protection than antivirus alone. The question is not which to choose, it’s whether your current endpoint protection is sufficient for the threats your business actually faces.

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What is the difference between antivirus and EDR?

Antivirus identifies threats it already knows about, whereas EDR identifies threats based on how they behave. This means it can catch attacks that have never been seen before.

Traditional antivirus software works by comparing files on a device against a database of known malware signatures. If a match is found, the threat is quarantined or removed. It is effective against established, well documented threats, but it has a fundamental limitation: it can only detect what it already knows.

Endpoint Detection and Response takes a different approach. Rather than looking for known malware, EDR monitors the behaviour of every process running on a device. It flags anything that looks suspicious, even if the specific threat has never been seen before. It also records a detailed log of activity, enabling security teams to investigate how a threat entered the environment and what it did once inside.

Is antivirus still worth using in 2026?

Antivirus remains a useful baseline protection layer, but it is no longer sufficient as the primary defence for businesses facing modern cyber threats.

The threat landscape has changed significantly since antivirus was the standard for business endpoint protection. Modern attacks increasingly use techniques specifically designed to evade signature based detection. Fileless malware, living-off-the-land attacks, and zero-day exploits are all attacks that antivirus databases haven't yet catalogued.

For businesses with minimal sensitive data and low cyber risk exposure, basic antivirus may still represent adequate protection relative to their specific risk profile. For the vast majority of SMEs across the West Midlands handling client data, financial information, or regulated systems, it is no longer the right primary defence.

What does EDR actually do that antivirus doesn't?

EDR provides three capabilities that traditional antivirus cannot: continuous behavioural monitoring, rapid incident response, and detailed forensic investigation.

Continuous behavioural monitoring: EDR monitors every process running on every endpoint in real time, looking for patterns of behaviour associated with an attack rather than specific file signatures. Unusual file encryption activity, abnormal network connections, and suspicious process execution are all flagged immediately, even when the specific malware involved has never been seen before.

Rapid incident response: When a threat is detected, EDR can automatically isolate the affected device from the network, preventing lateral movement to other systems while the threat is investigated. This containment capability is critical in ransomware scenarios, where speed of response directly determines how much of the environment is encrypted before the attack is stopped.

Forensic investigation: EDR maintains a detailed log of all activity across every endpoint, creating a timeline of exactly what happened, when, and how. This is invaluable both for understanding and remediating an incident and for meeting regulatory reporting obligations under UK GDPR if personal data was involved.

How does EDR protect against ransomware?

EDR detects ransomware through behavioural signals, and can isolate affected devices before the encryption spreads across the network. It specifically detects the unusual pattern of rapid, simultaneous file encryption that ransomware exhibits.

Traditional antivirus relies on recognising ransomware by its signature. New ransomware variants will not be in the signature database and will therefore bypass antivirus entirely until the database is updated.

EDR does not need to recognise the specific ransomware variant. It recognises the behaviour and acts on it in real time. For businesses across the West Midlands that have experienced or are concerned about ransomware, EDR is one of the most material improvements available to their security posture.

Does a small business need EDR?

A small business needs EDR if it handles data that has real value to attackers, such as client personal data, financial information, intellectual property, or access to a larger organisation's systems through a supply chain relationship.

The misconception that EDR is only for large enterprises is increasingly outdated. Modern EDR solutions are available at price points accessible to SMEs, and managed EDR, (where monitoring and response is handled by a managed IT provider rather than an internal security team), makes enterprise grade endpoint protection practical for businesses of any size.

The relevant question is not the size of the business, it is the value of the data the business holds and the consequences of that data being compromised.

What is managed EDR and how does it work?

Managed EDR is an endpoint detection and response service delivered by a managed IT provider. This means that the monitoring, investigation, and response capability is handled externally rather than requiring an internal security team.

For most SMEs, maintaining the in-house expertise to operate EDR effectively is not practical. Managed EDR addresses this by placing the monitoring and response function with a specialist provider, typically operating a Security Operations Centre (SOC) that reviews alerts, investigates threats, and coordinates response around the clock.

At Vibrant Networks, we provide managed endpoint protection for businesses across the West Midlands, ensuring that threats are identified and responded to promptly without placing the burden of security operations on the business itself.

How Vibrant Networks can help

At Vibrant Networks, we work with SMEs across the West Midlands to assess their current endpoint protection and implement the right level of security for their specific risk profile, from basic antivirus for low-risk environments to fully managed EDR for businesses handling sensitive data.

We offer a free, no obligation cyber security review for businesses across the West Midlands and beyond, including an honest assessment of whether your current endpoint protection is adequate for the threats your business actually faces.



Call 01922 612387 to arrange your free review, or explore our cyber security case studies to see how we have helped West Midlands businesses strengthen their defences.

Frequently Asked Questions

What is EDR in cyber security? EDR stands for Endpoint Detection and Response. It is a cyber security technology that monitors the behaviour of devices real time, detecting suspicious activity and enabling rapid investigation and response. Unlike traditional antivirus, which identifies known threats by signature, EDR detects threats based on behaviour. This means it can catch new and previously unseen attacks.

Is EDR better than antivirus? EDR provides significantly stronger protection than traditional antivirus for businesses facing modern cyber threats. Antivirus is effective against known, catalogued malware but has limited capability against new variants, fileless attacks, and zero-day exploits. EDR detects threats based on behaviour rather than signature, provides containment and response capability, and generates detailed forensic logs. These are capabilities that antivirus cannot match.

Do small businesses need EDR? Small businesses that handle client personal data, financial information, or regulated data should seriously consider EDR. The size of the business is less relevant than the value and sensitivity of the data it holds. Modern managed EDR solutions are available at price points accessible to SMEs, making enterprise-grade endpoint protection practical for businesses of any size.

What is the difference between EDR and antivirus? Antivirus detects threats by matching files against a database of known malware signatures. EDR monitors device behaviour continuously, detecting threats that don't match any known signature. This includes ransomware, fileless malware, and zero-day exploits. EDR also provides response capability that antivirus does not offer, such as isolating affected devices, investigating attack paths, and enabling rollback

What is managed EDR? Managed EDR is an endpoint detection and response service delivered by a specialist provider rather than an internal security team. The provider monitors alerts, investigates threats, and coordinates response, making enterprise-grade endpoint security practical for SMEs that do not have the in-house expertise to operate EDR independently.