CrowdStrike Falcon, SentinelOne Singularity, Sophos Intercept X, and Microsoft Defender for Endpoint / Defender XDR are the four endpoint detection + response platforms most UK organisations shortlist. All four are Gartner Magic Quadrant leaders. The differentiators are operational fit + commercial model — not capability.
The short answer
CrowdStrike Falcon — biggest market share, deepest cloud-correlated threat intelligence, the platform CISOs most often pick when budget allows. Best Falcon OverWatch managed threat hunting.
SentinelOne Singularity — strongest autonomous on-device response. Best ransomware rollback in the category. Closest competitor to CrowdStrike on capability.
Sophos Intercept X — broadest feature set built-in (EDR + DLP + encryption + server protection + email + firewall management) at a single per-user price. Best for SMB to mid-market customers consolidating tools.
Microsoft Defender XDR — included in Microsoft 365 E5. For customers already paying for E5, marginal additional cost is zero. Closing the capability gap fast.
Where CrowdStrike wins
Cloud-correlated threat intelligence. Falcon processes ~1 trillion endpoint events per day across customers; the threat graph correlates novel indicators globally. This is the genuine moat.
Falcon OverWatch (managed threat hunting). The 24/7 human-led threat hunting service is the deepest in the market. For organisations without a 24/7 SOC, this is the differentiator.
Module breadth. Identity Protection, Cloud Security, Next-Gen SIEM (Falcon LogScale), Surface Management, Data Protection, Charlotte AI — all on one agent.
See our CrowdStrike UK partner page.
Where SentinelOne wins
Autonomous on-device rollback. Singularity can revert ransomware-encrypted files via Volume Shadow Copy + behavioural engine on Windows, and via continuous file-system snapshots on Linux. This works offline (no internet required).
Pricing flexibility. Singularity Complete + Singularity XDR pricing is typically 15-30% below CrowdStrike Enterprise for equivalent capability.
Cloud Workload Security. Singularity Cloud uses eBPF on Linux, providing modern in-kernel observability without legacy agent overhead.
See our SentinelOne UK partner page.
Where Sophos wins
Single per-user price covers EDR + DLP + encryption + server protection + email + firewall management. For SMB / mid-market consolidating from 4-5 tools, the operational simplicity + price drop is genuinely impactful.
Sophos MDR is staffed 24/7 by Sophos analysts; the Advanced tier ingests telemetry from non-Sophos platforms (Microsoft Defender, CrowdStrike, SentinelOne) — giving you SOC monitoring over heterogeneous estate without ripping + replacing.
Best fit for UK SMB through mid-market (50-2,000 users).
Where Microsoft Defender XDR wins
Included in Microsoft 365 E5. For organisations already paying for E5 (which is most mid-market+ Microsoft customers in 2026), marginal cost = £0. Even Defender for Business (in M365 Business Premium) covers SMB needs.
Tenant consolidation. Same console for endpoint + email + identity + cloud apps + Sentinel SIEM. Single security operations view.
Capability has closed dramatically since 2022. Defender XDR is now Gartner-leader-tier — the gap to CrowdStrike + SentinelOne is real but narrowing every quarter.
What Servnet does
Servnet is an authorised UK partner of CrowdStrike, SentinelOne, Sophos + a Microsoft 365 + Defender for Endpoint deployer. We sell, deploy, migrate between any of them — and honestly recommend Microsoft Defender XDR when the customer is already E5-licensed and capability is sufficient (saving them £20-50k/year).