CrowdStrike vs Microsoft Defender: Honest Comparison for UK SMBs
Both CrowdStrike and Microsoft Defender for Endpoint are legitimate enterprise-grade security tools. The right choice depends on your threat profile, budget, and IT team's maturity.
The Bottom Line
Microsoft Defender for Endpoint (included in M365 Business Premium) is the right starting point for most UK SMBs. It's solid, free-with-existing-licensing, and deeply integrated with your Microsoft stack.
CrowdStrike is the upgrade you need when your threat profile is higher — regulated industry, high-value IP, or a history of security incidents.
Detection & Response
CrowdStrike consistently outperforms Defender in independent detection tests, particularly for sophisticated, fileless, and novel threats.
- CrowdStrike: superior detection rates in MITRE ATT&CK evaluations, lower dwell time, better threat hunting
- Defender: adequate for most SMB threat profiles, especially with Attack Surface Reduction rules enabled
- Defender: great at detecting known malware signatures; weaker at behavioural/anomaly detection vs CrowdStrike
Cost
- Defender: effectively free if you're on M365 Business Premium (£18.60/user/mo for the full suite)
- CrowdStrike: Falcon Go from ~£5/endpoint/mo on top of your existing security stack
- Total cost comparison for 100 users: Defender £0 extra, CrowdStrike ~£6,000/yr additional
Management & Complexity
- Defender: managed from Microsoft Defender XDR portal — familiar to M365 admins
- CrowdStrike: Falcon console requires training; more features but steeper learning curve
- Defender: auto-remediates many alerts without analyst intervention
- CrowdStrike: Falcon Complete MDR service handles response for you if you lack in-house SOC
Our Recommendation
Start with Defender for Endpoint. Configure Attack Surface Reduction rules, enable tamper protection, and integrate with Microsoft Sentinel. This gives you a solid baseline.
Evaluate CrowdStrike if: you process financial data or healthcare records, you've experienced a security incident, your board requires demonstrably stronger security, or you want managed detection and response.
- You don't have to choose exclusively — some organisations run CrowdStrike alongside Defender in 'coexistence' mode
- CrowdStrike offers a 15-day trial — test it in your environment before committing