A buyer’s framework for UK businesses comparing endpoint security products by coverage, operations, evidence, integration and response capability.
Use consistent evidence for every option.
| Criterion | Question | Evidence |
|---|---|---|
| Estate coverage | Supported devices, servers and operating systems | Validated deployment inventory |
| Detection operations | Alert quality, investigation and isolation | Scenario-based proof of value |
| Service model | Internal, managed or hybrid response ownership | Documented responsibility matrix |
| Commercial resilience | Support, data handling, renewal and exit | Current contract and offboarding test |
Antivirus and EDR are not the same purchase
The category has shifted and the vocabulary has not kept up. What you are actually choosing between:
| Type | What it does | Suitable for |
|---|---|---|
| Antivirus (AV) | Blocks known malware by signature | Not sufficient alone in 2026 |
| EDR | Records endpoint behaviour, detects suspicious activity, allows investigation and response | The realistic baseline for most businesses |
| XDR | Extends the same across identity, email, cloud and network | Larger or higher-risk organisations |
| MDR | A vendor's team monitors and responds on your behalf, 24/7 | Anyone without a 24/7 security team — which is most UK SMEs |
The most consequential decision is not which product, but whether anyone is watching it. An EDR generating alerts that nobody reads at 2am on a Sunday provides considerably less protection than the licence cost suggests. For most UK businesses without a security operations team, MDR — or an EDR bundled with managed response — is the honest answer.
The main options
| Vendor | Positioning | Notes for UK buyers |
|---|---|---|
| Microsoft Defender for Endpoint | Strong, and often already licensed | Included in Microsoft 365 E5 and available with Business Premium — check what you already own before buying anything |
| CrowdStrike Falcon | Premium EDR/XDR with strong managed options | Excellent detection; priced accordingly |
| SentinelOne | Strong autonomous response | Good mid-market fit |
| Sophos Intercept X | Mid-market, strong managed offering | Large UK partner presence |
| Bitdefender GravityZone | Good detection, competitive pricing | Strong value in the mid-market |
| ESET | Lightweight, cost-effective | Popular with smaller UK businesses |
Check your Microsoft licensing first. A large number of UK businesses buy third-party endpoint protection while already paying for Defender capability inside their Microsoft 365 subscription. If you hold Business Premium or E5, evaluate what you already have before adding cost.
Cyber Essentials, and why it shapes this decision
For UK businesses, Cyber Essentials is often the practical driver. It is required for many government contracts and increasingly requested in commercial supply chains and by insurers.
Its five controls are firewalls, secure configuration, user access control, malware protection and security update management. Endpoint protection sits in the middle of that, so aligning your choice with certification requirements avoids doing the work twice. Cyber Essentials Plus adds hands-on technical verification.
If you sell to the public sector or into regulated supply chains, treat certification as a commercial requirement rather than a security nicety.
What to evaluate
| Criterion | Why it matters |
|---|---|
| Detection quality | Use independent testing (MITRE ATT&CK evaluations, AV-Comparatives) rather than vendor claims |
| False positive rate | The most common cause of a security tool being quietly disabled |
| Managed response option | Do they investigate and act, or just alert you? |
| Platform coverage | Windows, macOS, Linux, mobile — check the mix you actually run |
| Performance impact | Test on your oldest hardware, not the newest |
| Integration | Does it feed your existing tooling and identity platform? |
| UK support hours | Incidents rarely respect time zones |
| Deployment effort | Realistically, how long to roll out across your estate? |
Realistic budgeting
Endpoint protection pricing generally runs per-endpoint per-month, rising with capability tier and again with managed service. The pattern worth planning around: MDR typically costs a multiple of unmanaged EDR — and for organisations without 24/7 coverage it is usually still the better value, because it converts an alert stream into an actual response capability.
Consider also what is included versus separately licensed: disk encryption management, mobile, server workloads and cloud workload protection are frequently additional.
Things that matter more than the product choice
- Coverage. Endpoints without the agent installed are where incidents start. Reconcile your agent list against your asset list — the gap is usually larger than expected.
- Patching. Endpoint protection does not compensate for unpatched systems.
- Admin rights. Removing local administrator rights prevents a substantial share of endpoint compromise, costs nothing, and is unpopular for about two weeks.
- Backups. The actual ransomware control. Offline or immutable, and tested.
- A response plan. Detection without a rehearsed response wastes the detection.
Frequently asked questions
Is Microsoft Defender good enough?
For many UK businesses, yes — it performs well in independent testing and is frequently already licensed. The case for a third-party product is usually a mixed-platform estate, a specific management preference, or a managed service you want from a specific provider.
Do we need MDR?
If nobody is watching alerts outside working hours, effectively yes. Attacks are timed for evenings, weekends and holidays precisely because response is slowest then.
Does endpoint protection cover cloud and SaaS?
No. Identity, email and SaaS need their own controls. Endpoint protection secures the device, not the account — and most modern incidents start with credentials rather than malware.