MDR, SOC, or traditional antivirus: What does my business need?

Every CEO who has reviewed their company's cybersecurity budget has, at some point, come across the same three acronyms: MDR, SOC, and—although it has been around much longer and is still included in many contracts—traditional antivirus. Cybersecurity vendors often talk about "comprehensive protection" and "advanced threat detection" almost interchangeably, turning a decision with very real financial and legal implications into an act of faith in whichever salesperson happens to be making the pitch. The reality is that these three approaches are not interchangeable, nor do they solve the same problems. They address different security needs, involve dramatically different cost structures, and, above all, provide very different levels of protection.

For years, selecting a corporate antivirus solution was a decision almost entirely delegated to the IT department. That era is over. According to INCIBE's report published in February 2026, Spain handled 122,223 cybersecurity incidents during 2025, a 26% increase over the previous year, with ransomware showing one of the sharpest increases, rising from 176 to 392 incidents in just twelve months. In 2024, the total number of incidents had already increased by 16.6% compared to 2023, confirming a sustained upward trend rather than a temporary spike. In addition, more than 237,000 vulnerable systems were identified during 2025 alone, most of them due to missing security patches or insecure cloud configurations. 

At the same time, the regulatory landscape has fundamentally changed. The NIS2 Directive, currently being transposed into Spanish law, shifts cybersecurity accountability directly to executive management for the first time, making it a responsibility that cannot simply be delegated to the CIO or CISO. A CEO who cannot demonstrate that their organization has a reasonable incident detection and response capability may now face liabilities that were once considered purely technical responsibilities. As a result, choosing between antivirus software, a SOC, or MDR is no longer just an IT purchasing decision—it has become a matter of corporate governance.

Traditional antivirus

How it works

Traditional antivirus software relies primarily on signature-based detection. It maintains a database of known malware signatures and blocks any file that matches one of those patterns. Modern antivirus solutions have incorporated heuristic analysis and a degree of machine learning, but the underlying principle remains the same: identify threats that have already been observed somewhere else.

This approach still performs reasonably well against widespread, non-targeted malware, which continues to account for a significant share of daily malicious activity. It is inexpensive, easy to deploy, and requires very little specialized expertise to manage.

Its limitations against today's threats

The problem arises when attackers do not rely on "off-the-shelf" malware. According to multiple technical studies published in 2026, signature-based antivirus solutions detect only about 40% of today's threats. The remaining 60% use evasion techniques that no signature database can predict, including polymorphic malware that changes its digital fingerprint every time it replicates, fileless attacks that leave no detectable files on disk, and zero-day vulnerabilities, for which no signature exists by definition.

Modern ransomware clearly illustrates this gap. According to reports from INCIBE-CERT, CCN-CERT, and Mandiant, cited in several industry analyses throughout 2026, the amount of time an attacker remains inside a network before launching encryption has frequently dropped to less than five days after the initial compromise. That leaves very little opportunity for a tool that only reacts when it recognizes an existing signature. Furthermore, the most common entry point is no longer a recognizable malicious attachment. Instead, attackers increasingly rely on stolen legitimate credentials obtained through infostealers or by exploiting remote access services that lack multi-factor authentication. In these situations, a traditional antivirus solution has little to contribute because the user's session appears entirely legitimate. According to the IBM X-Force Threat Intelligence Index 2026, 63% of security breaches begin with social engineering, an area where signature-based technology serves, at best, as the final layer of defense rather than the first.

SOC

What it is and what it takes to build one

A Security Operations Center (SOC) is a dedicated security team—either in-house or delivered as a managed service—responsible for continuously monitoring an organization's entire IT environment, including networks, endpoints, cloud infrastructure, identities, and applications. A mature SOC combines a Security Information and Event Management (SIEM) platform that centralizes and correlates logs across the organization with incident investigation processes, vulnerability management, and compliance reporting. Unlike traditional antivirus software, a SOC does far more than simply block threats—it investigates security events, documents incidents, and maintains the audit trail required by regulatory frameworks such as NIS2, GDPR, and DORA.

Building an in-house SOC from scratch, however, represents a major investment. According to cost analyses published in 2026, establishing a fully operational 24/7 SOC typically requires a first-year investment of €1.8 million to €3.3 million, followed by annual operating costs ranging between €800,000 and €1.3 million. These costs include hiring eight to ten full-time security analysts to provide round-the-clock coverage, licensing SIEM and detection platforms, maintaining secure facilities, and funding ongoing training programs, which typically cost between €10,000 and €20,000 per analyst each year for professional certifications. Organizations also face a significant talent retention challenge. According to the 2025 SANS Survey, 70% of SOC analysts with fewer than five years of experience leave their positions before reaching the three-year mark, forcing organizations into a continuous cycle of recruiting and training new personnel.

When building a SOC makes sense

According to several industry studies, operating an internal SOC generally becomes financially justifiable for organizations with more than 5,000 endpoints, strict regulatory requirements that demand complete internal control over incident response decisions, or highly customized applications that require analysts with deep knowledge of the organization's environment.

Below that threshold, the opportunity cost rarely justifies building an in-house SOC compared to managed alternatives.

MDR: The middle ground that has gained momentum

What an MDR service actually includes

Managed Detection and Response (MDR) is a fully managed security service that combines Endpoint Detection and Response (EDR) technology, threat intelligence, and experienced security analysts who actively investigate and respond to threats directly within the customer's environment—without requiring the customer to approve every individual action. The key difference between MDR and a traditional SOC-as-a-Service lies in its ability to take immediate containment actions. Isolating a compromised endpoint, terminating a malicious process, or disabling a compromised account is not merely a recommendation—these actions are performed by the provider in real time.

Why MDR has grown so rapidly

The global MDR market, valued at $4.1 billion in 2024, is projected to reach $11.8 billion by 2029, reflecting the growing number of mid-sized organizations choosing managed detection and response instead of building internal capabilities. The financial argument is compelling. While operating a SOC capable of protecting approximately 500 endpoints can require an investment of several million euros, an equivalent MDR service typically costs between €90,000 and €300,000 per year. A report by Enterprise Strategy Group, cited by cybersecurity provider Expel, estimates that MDR services deliver an average 308% annual return on investment compared to building an equivalent internal capability. Much of this efficiency comes from the provider spreading the cost of its technology platform and security analysts across hundreds of customers.

Another factor driving adoption is the subscription pricing model. Providers such as ESED, for example, offer outsourced cybersecurity services—including advanced antivirus with XDR/MDR, 24/7 monitoring, backup management, and cybersecurity consulting—for a fixed monthly fee. This predictable pricing model allows executive teams to budget cybersecurity expenses without unexpected costs or significant upfront investments. Additional information about this approach can be found on ESED's pricing page.

Its limitations

MDR is not a complete replacement for internal security governance. Organizations still delegate many day-to-day operational decisions to the provider, making it essential to define escalation procedures and incident response playbooks before deployment. Likewise, MDR alone does not fulfill every compliance requirement typically handled by a full SOC, such as end-to-end vulnerability management or certain industry-specific audit documentation. For this reason, organizations with several thousand employees often adopt a hybrid approach in which a small internal security team focuses on security architecture, advanced digital forensics, and regulatory relationships, while the MDR provider delivers continuous monitoring and incident response.

Three real-world scenarios to help you decide

Small businesses with 20 to 50 employees

For organizations without a dedicated cybersecurity team, a next-generation antivirus solution combined with an MDR service addresses most security risks at an affordable cost. According to industry research, a complete package—including EDR, multi-factor authentication (MFA), and web and email filtering—typically costs between €1,500 and €3,000 per year for a company of this size. This represents a relatively modest investment compared to the average ransomware payment in Spain in 2026, which industry sources estimate at around €50,000.

Mid-sized organizations with 200 to 1,000 employees

Organizations with growing regulatory obligations but without the budget required for a multi-million-euro SOC often benefit most from a hybrid security model. In this approach, a small internal security team defines security policies, oversees governance, and coordinates with business units, while an MDR provider delivers continuous monitoring, threat detection, and incident response outside business hours and during periods of increased activity.

Large enterprises in highly regulated industries

Organizations operating in sectors such as banking, energy, healthcare, or critical infrastructure, which are subject to regulations such as NIS2 or DORA, often require a much higher level of visibility and control.

Once an organization reaches a certain size, the volume of sensitive information it manages and the regulatory requirements for auditability and incident traceability generally justify investing in an in-house or hybrid SOC. In many cases, these organizations still complement their internal operations with MDR services to provide overnight and weekend monitoring, which can be difficult and costly to sustain using only internal personnel.

Spain's regulatory framework adds another layer of pressure

The implementation of the NIS2 Directive requires organizations to notify the appropriate CSIRT—either INCIBE-CERT or CCN-CERT, depending on the organization—of a significant cybersecurity incident within 24 hours of detection, followed by a detailed report within one month.

At the same time, the General Data Protection Regulation (GDPR) requires organizations to notify the Spanish Data Protection Agency (AEPD) within 72 hours whenever a security incident compromises personal data. This is particularly relevant in modern double-extortion ransomware attacks, where attackers steal sensitive information before encrypting systems.

Meeting these reporting deadlines without early threat detection capabilities and well-documented forensic evidence is, in practice, almost impossible if a traditional antivirus solution is the organization's only line of defense.

What should a CEO ask before signing the contract?

Before making a decision, executive leadership should honestly assess how many endpoints and locations need to be protected, whether the organization already has an internal team capable of responding to incidents outside business hours, which regulatory requirements apply to its industry, and what the financial and reputational impact would be if a serious security incident remained undetected for several days.

The answers to these questions usually provide a clear indication of whether the most appropriate starting point is to strengthen an existing antivirus solution with EDR, implement an MDR service, build an internal SOC, or adopt a combination of these security layers.

Conclusion

The real question is not which of these three approaches is universally better, because they do not compete with one another directly. Traditional antivirus software still plays an important role, but only as one layer within a defense-in-depth strategy—never as the sole line of protection against modern ransomware and today's increasingly sophisticated evasion techniques. A Security Operations Center (SOC) provides the highest level of visibility, control, and governance, but at a cost that only a limited number of organizations can realistically justify. Managed Detection and Response (MDR) has emerged as the practical middle ground, enabling most mid-sized organizations to benefit from expert threat detection and incident response without bearing the expense of building and maintaining an in-house security operations team. Ultimately, this is not a technology decision—it is a business decision. It comes down to determining how much cyber risk your organization is willing to accept and what level of incident response capability it can demonstrate through measurable actions rather than marketing promises when a cyberattack inevitably occurs.

Sources: INCIBE (Cybersecurity Incidents in Spain 2025 Report and 2024 Statistics), IBM X-Force Threat Intelligence Index 2026, IBM Cost of a Data Breach Report 2024, SANS 2025 Survey, Enterprise Strategy Group / Expel, industry cost analyses comparing MDR and SOC (2026), and technical reference guides on ransomware, NIS2, and GDPR compliance in Spain.