In depth

Pricing

UnderDefense publishes a transparent $11/endpoint/month starting point—unusual in MDR. Higher tiers (Standard, Enhanced, Professional) require contact sales but remain endpoint-priced. Sophos MDR hides pricing entirely behind a quote model, making budget planning difficult for prospects.

Features & Deployment

UnderDefense deploys cloud + on-premises and positions itself as a vendor-agnostic AI SOC overlay. Its core draw is the agentic AI layer that sits on top of your existing SIEM or XDR (any vendor), with 24/7 concierge analysts, co-managed SIEM, ChatOps, and IR retainers. You keep your current stack; UnderDefense augments it.

Sophos MDR is cloud-only and best suited to organizations already committed to Sophos Central. It offers 24/7 detection, third-party telemetry support, threat hunting, and incident response. Tighter integration with Sophos endpoint products, but tiered response SLAs and a cloud-first stance limit flexibility.

Ratings & Verdict

UnderDefense holds a slight edge in satisfaction (4.9 vs 4.7), though with a much smaller review base. Sophos’s larger sample reflects its installed base among enterprise Sophos customers. UnderDefense’s stronger overall score reflects its transparency, flexibility, and AI-first positioning.

Pick UnderDefense if you need an agentic AI SOC that wraps your existing SIEM/XDR and want published pricing. You trade some SOC scale for architectural flexibility and vendor lock-in avoidance.

Pick Sophos MDR if you are already a Sophos Central customer and want 24/7 managed detection without adding another vendor. Accept quote-based pricing and tighter product coupling in exchange for simpler administration.