Endpoint detection and response (EDR) replaces signature-based antivirus by continuously recording behaviour on every laptop, server and device, then using machine learning and threat intelligence to catch attacks that have no known signature. The gap is stark: modern EDR detects over 99% of attacker techniques, while traditional antivirus stops only 60% to 70%. That matters because 43% of UK businesses reported a cyber breach in the last 12 months, and the average most-disruptive incident costs around £1,600 for a typical SME, rising to ransomware demands of £25,000 or more. EDR catches fileless malware, living-off-the-land attacks and zero-day exploits that signatures miss entirely. UK pricing runs roughly £4 to £8 per endpoint per month for managed EDR, against £2 to £5 for business antivirus. For most UK firms without an in-house security team, managed detection and response (MDR) is the honest answer: EDR tooling plus a human team watching it 24/7.
Last updated: June 2026
Traditional antivirus has stopped protecting UK businesses because it relies on signatures: a database of known-bad file fingerprints. If an attack does not match a known fingerprint, signature antivirus waves it straight through. Attackers worked this out years ago, and the entire modern threat playbook is now built around techniques that leave no file to fingerprint at all.
Three categories of attack defeat signatures completely. The first is fileless malware, which runs entirely in memory and never writes a malicious file to disk. There is nothing for the scanner to scan. The second is living-off-the-land, where the attacker abuses legitimate, trusted Windows tools (PowerShell, WMI, PsExec, certutil, the so-called LOLBins) to move laterally and exfiltrate data. To a signature scanner, that activity looks like a system administrator doing their job. The third is the zero-day exploit, a vulnerability so new that no signature exists yet, by definition.
Layer on top of this the explosion in credential theft. A large share of breaches now involve no malware whatsoever: the attacker simply logs in with a stolen or phished password and behaves like a legitimate user. Antivirus has nothing to detect because nothing technically malicious is happening at the file level. This is why the detection numbers are so lopsided. Independent testing repeatedly shows behaviour-based EDR catching north of 99% of attacker techniques, while signature-only antivirus catches somewhere in the 60% to 70% range against a modern, evasive adversary.
The UK numbers make this concrete. The Government's Cyber Security Breaches Survey consistently finds around 43% of businesses reporting a breach or attack in the prior 12 months, equating to several hundred thousand UK organisations annually. Phishing remains the single most common attack vector by a wide margin, and phishing is the front door to exactly the credential-theft and fileless attacks that antivirus cannot see.
Our honest view: if your firm is still running consumer or basic business antivirus and nothing else, you do not have meaningful endpoint protection in 2026. You have a tool optimised for the threats of 2010. The technology is not bad at what it does; it is simply solving a problem attackers stopped relying on a decade ago.
| Attack type | How it evades signatures | Caught by antivirus? | Caught by EDR? |
|---|---|---|---|
| Fileless malware | Runs in memory, writes no file to disk | Rarely | Yes, via behaviour |
| Living-off-the-land (LOLBins) | Abuses trusted Windows tools | No | Yes, via context |
| Zero-day exploit | No signature exists yet | No | Yes, via anomaly |
| Stolen-credential login | No malware involved at all | No | Often, via behaviour |
| Known commodity virus | Has a published signature | Yes | Yes |
EDR continuously records what is happening on every protected device, analyses that telemetry for malicious behaviour rather than malicious files, and gives a security team the tools to investigate and respond. Think of antivirus as a bouncer checking IDs against a list of banned faces. EDR is closed-circuit television plus a trained operator who watches how people behave once they are inside, and who can lock the doors the instant something looks wrong.
Mechanically, an EDR agent sits on each endpoint and streams a rich telemetry feed: process creation, command-line arguments, registry changes, network connections, file modifications, parent-child process relationships, and user logon events. This telemetry is the heart of the system. Even if an attack succeeds momentarily, the recording lets responders reconstruct exactly what happened, which is something antivirus can never do because it keeps no history.
The detection engine combines several techniques. Machine-learning models score behaviour against known-malicious patterns. Behavioural rules flag sequences that are suspicious in combination even when each step looks innocent, for example Microsoft Word spawning PowerShell, which then reaches out to an unfamiliar IP address. Live threat intelligence feeds update indicators of compromise continuously. Many platforms map detections to the MITRE ATT&CK framework, so an analyst sees not just "alert" but "this is credential dumping, technique T1003, part of a wider intrusion".
The "response" half is what genuinely separates EDR from a smarter antivirus. A good platform can isolate a compromised machine from the network with one click while leaving the EDR connection live, kill a malicious process across the estate, roll back ransomware-encrypted files, quarantine artefacts, and block a specific binary everywhere at once. The core capabilities to expect are:
The practical effect is a shift in posture. Antivirus tries to prevent and then goes quiet. EDR assumes a determined attacker will eventually get a foothold and focuses on catching them fast, before a foothold becomes a full breach. In incident-response terms, EDR is what compresses "dwell time" (how long an attacker sits undetected) from weeks to minutes.
EDR sits on the endpoint and detects behaviour; antivirus blocks known files; MDR adds a human team to run your EDR for you; and XDR widens the lens to correlate signals across endpoints, email, identity and cloud. These four terms get blurred in vendor marketing, but the distinction is genuinely important when you are signing a contract, because you can easily pay for a capability you have no one to operate.
Start with the simplest split. Antivirus (often now sold as EPP, endpoint protection platform) is prevention: it tries to stop bad things landing. EDR is detection and response: it assumes some bad things will land and catches them. The best modern products bundle both, so a "next-generation antivirus" usually includes EDR features. The decisive question is not the product label but who is watching the alerts.
That is where MDR enters. EDR generates alerts, sometimes a lot of them, and someone has to triage, investigate and respond around the clock. If you have a 24/7 security operations centre (SOC) in-house, buy EDR and run it. If you do not, and very few UK SMEs do, the EDR console becomes a dashboard nobody is watching at 2am on a Sunday, which is precisely when ransomware crews like to strike. MDR (managed detection and response) is the answer: a provider supplies the EDR tooling and the human analysts who watch it for you and take action on your behalf.
XDR (extended detection and response) is a different axis entirely. It extends the same detect-and-respond philosophy beyond the endpoint to correlate telemetry from email, identity providers, firewalls, servers and cloud workloads in one place. The value is in connecting dots that look harmless in isolation: a suspicious login in your identity system, plus an odd process on a laptop, plus an outbound connection, become one obvious attack chain when correlated.
| Capability | Antivirus (EPP) | EDR | MDR | XDR |
|---|---|---|---|---|
| Detection method | Signatures | Behaviour and ML | Behaviour and ML | Cross-domain correlation |
| Scope | Single device | All endpoints | All endpoints | Endpoint, email, identity, cloud |
| Records history? | No | Yes | Yes | Yes |
| Who watches alerts? | Nobody | Your team | Provider's SOC, 24/7 | Your team or provider |
| Can isolate a host? | No | Yes | Yes | Yes |
| Best for | Legacy baseline | Firms with a SOC | SMEs with no SOC | Larger, complex estates |
Our stance: most UK firms between 20 and 250 staff over-research the EDR-versus-XDR debate and under-think the staffing question. The honest rule is simple. If you do not have someone whose actual job is to investigate a security alert at 3am, you are not buying EDR, you are buying MDR. Everything else is a detail.
No, neither Cyber Essentials nor Cyber Essentials Plus explicitly mandates EDR, a SOC or a SIEM by name. However, the malware protection control requires effective protection on every in-scope device, and Cyber Essentials Plus involves a hands-on assessor test that simple signature antivirus increasingly struggles to pass. In practice, EDR-class protection has become the path of least resistance to certification, even though the scheme does not spell out the acronym.
Cyber Essentials is the UK Government-backed, NCSC-managed certification covering five technical controls: firewalls, secure configuration, user access control, malware protection, and security update management. EDR maps most directly to the malware protection control. The scheme is deliberately technology-neutral. It tells you the outcome required (devices must be protected against malware) without prescribing a specific product category, which is why you will not find "EDR" written into the requirements document.
The nuance is in Cyber Essentials Plus. The standard self-assessed Cyber Essentials is a questionnaire. Cyber Essentials Plus adds an independent technical audit where an assessor actively tests your defences, including detonating sample malware and checking that your endpoint protection catches it and blocks malicious actions. Basic antivirus can pass for now, but as test payloads modernise, behaviour-based detection makes passing far more reliable. We have seen firms scramble after a failed Plus assessment precisely because their dated antivirus missed a behavioural test case.
Uptake of the scheme is climbing, which raises the bar across UK supply chains. Government and many private buyers now require Cyber Essentials as a condition of contract, so certification is increasingly a commercial gate, not just a security nicety. If you sell to the public sector or to larger enterprises, certification is often non-negotiable, and EDR makes the whole programme smoother.
There is a compliance layer beyond Cyber Essentials too. Under UK GDPR and the Data Protection Act 2018, a personal-data breach that meets the risk threshold must be reported to the Information Commissioner's Office (ICO) within 72 hours of becoming aware of it. You cannot report what you cannot see, and you cannot scope the impact accurately without forensic telemetry. EDR's recorded history is what lets you tell the ICO exactly what was accessed, which can be the difference between a contained, well-handled incident and a regulatory nightmare.
Most UK businesses handling client data, money or staff personal information should run EDR-class protection, but there are genuine cases where it is overkill, and we would rather tell you that than upsell you. The honest test is about your risk surface and your obligations, not your headcount alone. A 10-person accountancy firm holding hundreds of clients' financial records needs EDR far more than a 40-person manufacturer with no sensitive data and a fully segmented network.
You almost certainly need EDR (and probably MDR) if any of the following are true. You hold regulated or sensitive data: client financials, health records, legal case files, or large volumes of personal data. You are in a targeted sector: professional services, finance, healthcare, legal, and increasingly logistics and construction are all heavily targeted in the UK. You have a supply-chain obligation or a contract requiring demonstrable security. You have suffered an incident before. Or you simply could not survive several days of downtime, because ransomware recovery without good tooling routinely runs into weeks.
You can reasonably skip dedicated EDR, at least for now, in a narrow set of cases. A sole trader or micro-business with no employees, no sensitive client data, and a single well-patched device, where modern built-in protection plus good backups and multi-factor authentication is a proportionate baseline. Or an organisation whose entire workflow lives in a locked-down, fully managed cloud platform with no traditional endpoints to compromise. Even then, we would push you towards the EDR capability that is already bundled into business Microsoft 365 plans, because the marginal cost is low.
Be sceptical of two arguments. First, "we are too small to be a target". UK attackers run automated, untargeted campaigns; small firms are hit precisely because they are softer. The breaches survey shows small organisations are breached in large numbers every year. Second, "we have backups, so we are fine". Backups protect against data loss; they do nothing to stop data theft and extortion, which is now the dominant ransomware model. Attackers steal first, encrypt second, and threaten to publish.
| Your situation | Recommendation | Why |
|---|---|---|
| Handle client financial or health data | EDR plus MDR | High-value target, regulatory exposure |
| 20 to 250 staff, no in-house security | Managed EDR (MDR) | No one to watch alerts 24/7 |
| Supply-chain or public-sector contracts | EDR plus Cyber Essentials Plus | Commercial and audit requirement |
| Have an internal SOC or security analyst | EDR, self-managed | You can operate the console |
| Sole trader, no sensitive data, one device | Built-in protection plus backups and MFA | Proportionate to low risk |
For most UK SMEs in 2026, the strongest options are Microsoft Defender for Business, Sophos Intercept X, SentinelOne Singularity, CrowdStrike Falcon and Huntress, with the right choice driven less by the engine and more by how it will be operated. All five detect modern attacks well in independent testing; the real differentiators are price, management overhead and whether the vendor offers a managed service to sit on top.
Microsoft Defender for Business is the default starting point for a reason. It is genuinely capable EDR, and if you already run Microsoft 365 Business Premium it is included at no extra licence cost, which removes the single biggest objection. For a Microsoft-centric SME, it is often the most cost-effective path to real protection. The catch is that "included" does not mean "watched"; you still need someone to manage and respond, which usually means pairing it with an MDR partner.
Sophos Intercept X is the perennial SME favourite, with a clean management console, strong anti-ransomware including file rollback, and an MDR service that is well-suited to firms with no security staff. SentinelOne Singularity is known for a high degree of automation and autonomous response, which appeals where speed matters and analysts are scarce. CrowdStrike Falcon is the enterprise heavyweight, exceptional at detection and threat intelligence, though its pricing and orientation lean towards larger estates. Huntress deserves special mention for the smaller end of the market: it is explicitly built for SMEs and managed service providers, includes human analysts in the loop, and is priced and packaged accordingly.
| Platform | Best fit | Standout strength | Managed option? |
|---|---|---|---|
| Microsoft Defender for Business | Microsoft 365 shops | Often bundled, no extra licence | Via MDR partner |
| Sophos Intercept X | SMEs, no security staff | Easy console, ransomware rollback | Yes, Sophos MDR |
| SentinelOne Singularity | Lean teams wanting automation | Autonomous response | Yes, Vigilance |
| CrowdStrike Falcon | Larger or complex estates | Detection and threat intel | Yes, Falcon Complete |
| Huntress | Small firms and MSPs | Human-led, SME-priced | Yes, built in |
Our honest stance on platform selection: do not agonise over which engine wins a given lab test by a percentage point. They are all good. The decisions that actually determine whether you get breached are operational, namely whether alerts are watched 24/7, whether response is automated or waits for a human, and whether your provider knows your environment. We would rather deploy a "second-best" platform that is properly managed than the lab winner sitting in a console nobody opens. Pick the engine that fits your stack (Microsoft if you live in 365, Sophos or Huntress if you want SME-friendly management) and then invest the real effort in the operating model.
Managed EDR in the UK typically costs between £4 and £8 per endpoint per month, against £2 to £5 for business antivirus, while full MDR with 24/7 human response sits higher, commonly £15 to £40 per endpoint per month depending on coverage. The headline per-device figure is the easy part. The number that should actually drive your decision is the comparison against the cost of a breach, where the maths is not close.
Let us run it for a representative 30-person UK firm with 35 endpoints (laptops plus a few servers). At the lower end, antivirus might cost around £3 per device per month, roughly £1,260 a year. Managed EDR at £6 per device is about £2,520 a year. Step up to MDR with 24/7 human monitoring at, say, £20 per device and you are at roughly £8,400 a year. Those are real costs, and for a small firm they are not trivial.
Now weigh that against the downside. The Cyber Security Breaches Survey puts the average most-disruptive breach for a typical business at around £1,600, but that average flatters the picture badly: it bundles in the very large number of trivial incidents. The relevant comparison for an EDR decision is a serious incident, and ransomware demands on UK SMEs now routinely start at £25,000 and climb fast, before you add recovery costs, downtime, lost contracts, regulatory exposure and reputational damage. Global ransomware recovery costs average well over a million dollars per incident. One avoided ransomware event pays for decades of MDR.
| Option (35 endpoints) | Per endpoint / month | Approx annual cost | What you get |
|---|---|---|---|
| Business antivirus | £3 | £1,260 | Signature prevention only |
| Managed EDR | £6 | £2,520 | Behaviour detection, you respond |
| MDR (24/7 human response) | £20 | £8,400 | EDR plus a SOC watching for you |
| One ransomware incident | n/a | £25,000+ demand, plus recovery | Downtime, data theft, ICO exposure |
The total cost of ownership extends beyond the licence. Budget for deployment and tuning, which is one-off effort to roll the agent out and reduce false-positive noise; ongoing management time if you self-run; and the cost of an incident-response retainer so you have experts on call before, not during, a crisis. Our stance is that for the under-50-staff bracket without a security team, MDR is not a premium upgrade, it is the correct baseline, because unwatched EDR provides a false sense of security at almost the cost of the real thing. Spend the extra to have humans on the other end of the alert.
Softomate Solutions deploys and manages EDR for UK businesses through a five-stage process that takes most SMEs from scoping to fully monitored protection in two to four weeks, with managed detection and response starting from £18 per endpoint per month and a fixed-quote implementation fee agreed before any work begins. We do not run open-ended day rates that balloon, and we do not sell you a console and walk away. The whole point of our model is that someone is genuinely watching.
We are a London-based automation and software development agency in Stanmore (HA7), and our security work sits alongside the wider systems we build, which means EDR rollout fits naturally with whatever else we are doing for you, whether that is business process automation, a custom CRM build, or general software development where security has to be designed in rather than bolted on. The five stages run as follows.
| Stage | Typical timeline | What you receive |
|---|---|---|
| Scope and assess | Days 1 to 3 | Endpoint inventory, fixed quote |
| Select and configure | Days 3 to 7 | Platform choice, tuned policies |
| Deploy and tune | Week 2 | Agents live, noise reduced |
| Monitor and respond | Ongoing, 24/7 | Active threat response |
| Review and report | Monthly and quarterly | Board-level reporting |
Managed EDR with our team starts from £18 per endpoint per month, with the exact figure confirmed at the scoping stage based on your tier and estate size, and the implementation fee fixed up front so there are no surprises. If you are also looking at tightening operations more broadly, our AI automation work often pays for the security spend by removing manual cost elsewhere. The first conversation is free and there is no obligation.
No, Cyber Essentials does not name EDR as a requirement. Its malware protection control demands effective protection on every device without prescribing a product type. In practice, EDR-class protection satisfies the control cleanly and makes the hands-on Cyber Essentials Plus malware test far easier to pass than basic antivirus.
Yes, to an extent. Microsoft 365 Business Premium includes Microsoft Defender for Business, which is genuine EDR at no extra licence cost. It is capable protection, but it is not actively watched on your behalf. You still need someone, in-house or an MDR partner, to monitor alerts and respond around the clock.
EDR is the tooling; MDR is the tooling plus a human team running it for you 24/7. A 30-person firm rarely has anyone to watch security alerts at 3am, so EDR alone often becomes an unwatched dashboard. For that size of business without security staff, MDR is usually the correct and safer choice.
Managed EDR in the UK typically costs £4 to £8 per endpoint per month, compared with £2 to £5 for business antivirus. Full MDR with 24/7 human response commonly runs £15 to £40 per endpoint per month. For a 35-device firm, that is roughly £2,520 to £8,400 a year, against ransomware demands starting at £25,000.
Modern EDR agents are lightweight and designed to run continuously with negligible impact on day-to-day performance. Most users never notice the agent. Any meaningful slowdown usually points to a misconfiguration or a conflict with old antivirus, which is why proper deployment includes removing legacy tools and tuning policies during rollout.
EDR substantially reduces ransomware risk by catching the behaviour before encryption spreads and isolating the affected device in seconds. Many platforms can also roll back encrypted files. It is not a guarantee, which is why EDR should sit alongside reliable offline backups, multi-factor authentication and staff awareness as part of a layered defence.
Not as a separate product. Modern EDR platforms include next-generation antivirus prevention as well as behaviour-based detection and response, so they replace traditional antivirus rather than running alongside it. Running two endpoint agents from different vendors often causes conflicts and performance problems, so you consolidate onto one.
For most UK SMEs, EDR deployment takes two to four weeks from scoping to fully tuned protection. Agent rollout itself is fast, often a day or two. The time goes into tuning out false positives so alerts are meaningful, configuring response policies, and confirming coverage on every device including servers and remote laptops.
EDR collects security telemetry such as process and network activity, not the contents of personal files or emails. A reputable UK provider processes this in line with UK GDPR, with clear data-handling terms. The forensic record is what enables accurate breach reporting to the ICO within the required 72-hour window if an incident occurs.
Usually yes, if you hold client data, money or personal information, because attackers target small firms precisely for being softer. The exception is a micro-business with no sensitive data and a single well-patched device, where built-in protection plus backups and MFA can be proportionate. When in doubt, the bundled Microsoft 365 EDR is a low-cost starting point.
Signature antivirus catches 60% to 70% of modern attacker techniques; behaviour-based EDR catches over 99%, and that gap is the whole argument. With 43% of UK businesses breached annually and ransomware demands on SMEs now starting at £25,000, the comparison between £2,520 a year for managed EDR and the cost of one serious incident is not a close call. EDR does not name itself in Cyber Essentials, but it satisfies the malware control, smooths the Cyber Essentials Plus audit, and gives you the forensic visibility you need to report a breach to the ICO inside 72 hours. The single decision that matters most is not the platform, it is who watches the alerts. For most UK firms without an in-house security team, that means managed detection and response, not unwatched tooling. Decide your tier, pick an engine that fits your stack, and put humans on the other end of the alarm.
If you are ready to move beyond antivirus and want EDR deployed and properly managed by a UK team, explore our software development and security services in London or get in touch for a free, no-obligation scoping call.
Written by Deen Dayal Yadav, Founder of Softomate Solutions, a London-based software development and AI automation agency in Stanmore (HA7). With over 12 years building software, automation and secure systems for UK businesses, he helps firms replace dated tooling with protection that actually fits how they work. Softomate Solutions is registered at Companies House and works with SMEs across professional services, finance and healthcare. Learn more about Softomate Solutions.
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