MSP vs. MSSP vs. MDR: Which One Does Your Organization Actually Need?

Ask ten IT vendors whether they “do security” and ten will say yes. Ask them what happens at 3 AM on a Sunday when a mailbox rule starts forwarding your CFO’s email to an outside address, and the answers get quieter.

That gap—between having an IT provider and having someone watching—is the difference between a Managed Service Provider (MSP), a Managed Security Service Provider (MSSP), and Managed Detection and Response (MDR). The three terms get used interchangeably in sales decks. They are not interchangeable in an incident. This guide explains what each one covers, what each one won’t do, and how to tell which one your organization needs.

Key Takeaways

1. An MSP keeps technology running; an MSSP keeps it defended through a staffed 24/7/365 Security Operations Center (SOC); MDR is one component of defense, usually endpoint-focused
2. Most organizations that “have IT” have an MSP and assume it covers security monitoring. Read the agreement: no stated monitoring hours and no response SLA means no MSSP
3. MDR sees what its platform sees—typically endpoints. Email, identity, network, cloud, and backups need coverage from somewhere else
4. Organizations with 100+ endpoints and an internal IT team usually land on a co-managed model: their team runs the help desk and roadmap, the MSSP runs the SOC and after-hours response
5. Eight written answers separate a real MSSP from an MSP with security add-ons (list below)

The One-Sentence Definitions

• MSP (Managed Service Provider): keeps your technology running—help desk, patching, backups, networks, cloud, phones, and projects.
• MSSP (Managed Security Service Provider): keeps your technology defended (see our managed security services)—24/7 monitoring, threat detection, incident response, and compliance evidence, delivered through a Security Operations Center (SOC).
• MDR (Managed Detection and Response): a narrower security service, usually built around one detection platform (most often endpoint), that investigates alerts and responds to confirmed threats.

The short version: an MSP is about uptime, an MSSP is about defense, and MDR is one component of defense that some vendors sell on its own.

MSP vs. MSSP: The Accountability Gap

Most organizations with 20 to 200 employees have an MSP. Fewer have an MSSP, and many assume the first covers the second. It usually doesn’t.

A good MSP will deploy antivirus, run backups, enforce multi-factor authentication, and patch servers on a schedule. Those are controls. What an MSP typically does not provide is a human being watching the output of those controls around the clock and acting on it. The antivirus fires an alert at 2:14 AM; the alert lands in a queue; someone reads it at 8:30 AM. Six hours is enough time for ransomware to finish.

An MSSP closes that gap with a staffed SOC. The SOC ingests signals from endpoints, email, identity (Microsoft 365 or Google Workspace sign-ins), firewalls, and cloud workloads, correlates them, and escalates or contains in minutes rather than hours. It also produces the artifacts auditors ask for: log retention, incident reports, vulnerability scan results, and evidence that someone reviewed them.

What to check on your current MSP agreement: look for the words “24/7/365 monitoring,” “incident response,” and a stated response time for security events. If the agreement says “security tools included” but names no monitoring hours and no response SLA, you have an MSP, not an MSSP.

MSSP vs. MDR: Breadth vs. Depth

MDR grew out of Endpoint Detection and Response (EDR) platforms. An MDR provider watches the telemetry from one detection product—usually endpoints, sometimes identity or cloud—and its analysts investigate and respond to what that product surfaces. Done well, MDR is excellent at what it covers.

The limitation is scope. Endpoint MDR does not see a phishing email that never reaches a device, a misconfigured firewall rule, a contractor’s shared credential logging in from another continent, or a backup job that silently stopped three weeks ago. An MSSP is expected to cover all of those layers and to own the response across them.

Many MSSPs now include MDR as a component, and some MDR vendors have expanded toward MSSP scope. The question to ask is not “MDR or MSSP” but “which layers are monitored, by whom, and who acts when something is found.”

What “SOC as a Service” Should Include

If a provider calls its offering SOC as a Service, managed SOC, or MSSP, it should be able to answer all eight of these in writing:

1. Hours of coverage. 24/7/365 with staffed analysts, or business hours with automated alerting after 6 PM?
2. Telemetry sources. Endpoints, email, identity, network, cloud, backups—which are in scope and which cost extra?
3. Response authority. Will the SOC isolate an endpoint or disable an account without waiting for you to approve it at 3 AM?
4. Response time. Time to acknowledge and time to contain, written as a Service Level Agreement (SLA).
5. Log retention. How many days, and can you export them for an auditor or cyber-insurance carrier?
6. Reporting. Monthly summaries, per-incident reports, and vulnerability scan results—or a dashboard you’re expected to check yourself?
7. Who owns the tools. Is the provider operating its own platform and infrastructure, or reselling and re-labeling a third party’s?
8. Compliance mapping. Can they map their controls to HIPAA, NIST CSF, CIS Controls, or your cyber-insurance questionnaire?

A provider that hesitates on numbers 3, 4, and 7 is an MSP with security add-ons, whatever the proposal says.

MSP vs. MSSP vs. MDR at a Glance

Capability	MSP	MDR	MSSP
Help desk, patching, backups, projects	Yes	No	Often (when combined with MSP)
Security tool deployment	Yes	Endpoint only	Yes
24/7/365 staffed monitoring	Rarely	Yes (in-scope telemetry)	Yes
Coverage beyond endpoints (email, identity, network, cloud)	No	Limited	Yes
Active containment authority	No	Usually	Yes
Compliance evidence and audit support	Limited	Limited	Yes
Best fit	Uptime and day-to-day IT	Adding detection to an existing IT team	Organizations that need defense and evidence, with or without internal IT

Which One Does Your Organization Need?

Under 25 endpoints, no regulated data: an MSP with strong baseline controls, plus a clear answer to “who responds after hours.”

25 to 100 endpoints, or any regulated data (patient records, client files, donor data): an MSSP. At this size the cost of a breach—notification, legal, downtime, insurance—exceeds the cost of monitoring many times over, and HIPAA, state privacy law, and cyber-insurance carriers increasingly expect documented 24/7 detection.

100+ endpoints with an internal IT team: a co-managed arrangement. Your team keeps the help desk, the applications, and the roadmap. The MSSP supplies the SOC, the after-hours coverage, the detection stack, and the compliance reporting your team doesn’t have the headcount to run. This is the model most mid-market organizations land on, and it is the one most often mislabeled as “we already have IT.”

Any size, already running EDR with an internal security lead: MDR on top of your existing stack may be the right, narrower answer—provided someone owns the layers MDR doesn’t see.

Where Boom Logic Sits

We are the case most organizations are looking for and have trouble finding: one team that operates as the MSP and the MSSP.

Our 24/7/365 Security Operations Center monitors endpoints (CrowdStrike Falcon), email, identity, network, and cloud workloads for every organization on an MSSP Pro or MSSP Enterprise plan. When the SOC confirms a threat it isolates the affected systems and contains the damage before it spreads, and the commitment is written into the agreement: acknowledgment within 30 minutes, containment under way within one hour, 24/7/365, with a service credit if we miss. The first 24 hours of incident response are included; deeper forensics and post-breach rebuilds are scoped separately, in writing, so nothing is hidden in the monthly fee. The same engineers who run your infrastructure run your defense—no hand-off between a “help desk vendor” and a “security vendor” when the two need to talk at 3 AM.

We can do this because we own and operate our stack: our cloud platform, our network, and our BoomTalk™ communications platform, with a presence in the world’s top-rated data centers—One Wilshire and Equinix. For enterprise-scale engagements—extended forensics, breach response beyond the first 24 hours, virtual CISO, and compliance programs—we extend our SOC with a specialist managed security partner, delivered under the Boom Logic agreement and on the Boom Logic invoice. Pricing is flat-rate per user or endpoint, with tiers for organizations from 10 to 200+ seats, and co-managed engagements for teams that want to keep their internal IT.

We have been doing this in Los Angeles for 18+ years, across healthcare practices and community health centers, law firms, and nonprofits—the organizations for whom “we’ll look at it Monday” was never an acceptable answer.

Find Out Which One You Have

Start with a free IT and security assessment. We review your current controls, monitoring coverage, backups, and identity configuration and tell you, in plain terms, whether you have an MSP, an MSSP, or a gap between the two.

Organizations with 25+ staff or endpoints also receive a complimentary external penetration test and phishing simulation as part of the assessment, delivered under a signed rules-of-engagement agreement.

Or call 833-BOOM-338 (833-266-6338).

Frequently Asked Questions

Is an MSSP the same as an MSP with security tools?

No. An MSP deploys security tools; an MSSP staffs a Security Operations Center that monitors those tools 24/7/365, investigates alerts, and responds to confirmed threats under a written SLA. The tools are the same; the difference is who is watching and who acts.

Can I have both an MSP and an MSSP?

Yes, and many organizations do. The risk is the hand-off between two vendors during an incident. A single provider that operates as both, or a co-managed arrangement with your internal IT team, removes that seam.

Is MDR enough on its own?

MDR covers the telemetry of the platform it is built on—usually endpoints. It does not cover email, identity, network, cloud, or backups unless the provider has expanded scope. Ask which layers are monitored before deciding it is enough.

How do I know if my current provider is an MSP or an MSSP?

Read the agreement. Look for stated monitoring hours (24/7/365), a security incident response time expressed as an SLA, and whether the provider has authority to contain a threat without your approval. If none of those appear, you have an MSP.