Best MDR Providers

Managed Detection and Response (MDR) is a security service where a third-party provider operates detection and response on behalf of an organisation. The MDR provider deploys their technology stack, ingests the customer's telemetry, and provides 24/7 analyst coverage to detect, investigate, and contain threats. MDR differs from MSSP (Managed Security Service Provider) in its focus on active threat detection and response rather than device management.

MDR is typically the right choice when: you have fewer than 5 security headcount and can't staff 24/7 coverage; you need immediate operational capability without a long deployment project; your budget is better suited to OpEx (MDR subscription) than CapEx (tooling + headcount). In-house SOC makes sense when: you have sensitive data that can't be shared with a third party; you want full control over investigation methodology; you have the headcount and budget to build and staff a team.

MDR SLAs typically cover: Mean Time to Detect (MTTD) — typically 15 minutes to 4 hours; Mean Time to Respond (MTTR) — the SLA for initial response action after detection; escalation response — time from detection to customer notification; analyst availability — 24/7/365 SOC coverage guarantee. Premium providers like eSentire offer sub-15-minute MTTD SLAs.

MDR providers deploy their own technology stack (EDR, SIEM, network sensors) as part of the service. However, most enterprises already have existing tools they've invested in. Look for MDR providers that can integrate with your existing tools rather than requiring full replacement. Co-managed MDR models (Red Canary, Expel, Deepwatch) are designed for organisations with existing security investments.

Core MDR telemetry requirements: endpoint EDR (typically their own agent or a supported third-party EDR), network logs (firewall, proxy, DNS), identity logs (Okta, Entra ID), and cloud logs (AWS CloudTrail, Azure Activity Logs). Some providers also deploy their own network sensors. Data residency — where your logs are processed and stored — should be clarified during procurement.

Transparency varies significantly. Providers like Red Canary and Expel offer customer-facing portals where you can watch analyst investigations in real time. Others (Arctic Wolf, eSentire) provide investigation summaries but less granular methodology visibility. If transparency is important to your team's learning and audit requirements, ask for a portal demo during evaluation.

Yes — this is called co-managed MDR. The MDR provider handles 24/7 monitoring and initial triage; the internal team handles complex investigations, detection engineering, and policy decisions. Co-managed models (Red Canary, Deepwatch, Expel) are designed for this model and provide the internal team with full visibility into MDR operations.

MDR pricing typically varies by: number of endpoints monitored, number of users, log volume ingested, or a flat fee for organisations under a certain size. Enterprise MDR ranges from $50K–$500K+ per year depending on scope. SMB MDR (Huntress, Arctic Wolf for small environments) can start under $20K per year. Get proposals from at least three providers as pricing varies significantly.

Key questions: (1) What is your MTTD SLA and how is it measured? (2) Can I see a sample investigation report? (3) Who is my named analyst contact? (4) How are escalations handled out of hours? (5) Can I access investigation data and raw alerts? (6) What happens to my data if I terminate the contract? (7) What is your false positive rate and how do you report it?

An MSSP (Managed Security Service Provider) traditionally manages security devices — configuring and monitoring firewalls, IDS/IPS systems, and SIEMs — and escalates alerts to the customer's team. MDR providers actively investigate and respond to threats rather than just passing alerts. Modern MDR includes threat hunting, investigation, and containment actions; traditional MSSP typically does not.