SOC for startups: when it makes sense (and what to do first)

What a SOC is and why it is not the first step

A Security Operations Center (SOC) is an organizational function — not just a set of tools — responsible for monitoring, detecting, analyzing, and responding to cyber threats in real time, usually 24 hours a day, 7 days a week. It combines security analysts, triage processes, and platforms such as a SIEM (Security Information and Event Management) and a SOAR (Security Orchestration, Automation and Response).

For startup founders and CTOs, the SOC tends to appear on the radar early — whether because an enterprise client requires it or after the first scare with an incident. The problem is that building or hiring a SOC before having the security foundation in place is the equivalent of installing security cameras in a house whose doors have no locks. The investment goes toward monitoring symptoms of vulnerabilities that basic controls could have eliminated.

The NIST Cybersecurity Framework structures security into five functions: Identify, Protect, Detect, Respond, and Recover. The SOC lives in the Detect and Respond functions. Startups that jump to those functions without having Identify and Protect well established spend more and protect less.

What to build before the SOC: the foundation that delivers the most per real spent

Before any conversation about 24x7 monitoring, six controls need to be operational and verified — not just installed. The first is multi-factor authentication (MFA) on all critical access: corporate SaaS, code repositories, cloud consoles, and VPNs. More than 80% of the credential breaches recorded by the Verizon DBIR 2024 involve credentials without MFA.

The second control is EDR (Endpoint Detection and Response) on all managed devices. Tools such as CrowdStrike Falcon Go, SentinelOne Singularity, or Microsoft Defender for Business deliver visibility and blocking of malicious behavior without requiring a dedicated analyst for every alert. The third is automated and tested backup — not just configured. Backups that have never been restored in a test environment are not backups, they are hope.

The fourth control is log centralization: CloudTrail (AWS), audit logs (GCP/Azure), IdP authentication logs, and application logs on a single platform — even one as simple as Elastic Cloud or CloudWatch. The fifth is vulnerability management with a recurring scanner (Tenable, Qualys, or Trivy for containers) and a defined SLA for remediation by severity. The sixth, and frequently forgotten, is a documented and rehearsed incident response plan: who decides, who communicates, who isolates the environment, and who engages legal.

These six controls, implemented correctly, reduce the probability of an incident with material impact by more than 60% — according to the CIS Controls v8 benchmarks published by the SANS Institute. And they cost a fraction of what a SOC would.

Triggers that signal the SOC has started to make sense

The first trigger is regulatory or contractual. Fintechs under the supervision of the Central Bank of Brazil must comply with Resolution CMN 4.893 and Circular 3.909, which require continuous controls for monitoring security events. Operations handling health data, minors' data, or financial data at scale trigger specific LGPD obligations that make continuous monitoring a legal necessity — not just a technical one.

The second trigger is the enterprise client. When contracts begin to include security clauses requiring an MTTD (mean time to detect) and MTTR (mean time to respond), or when a due-diligence process demands evidence of 24x7 monitoring and periodic security reports, the SOC stops being optional and becomes part of the value proposition.

The third trigger is the growth of the attack surface. A startup that had 5 developers and a simple monorepo has a very different risk profile from a company with 150 employees, dozens of API integrations, a multicloud environment, and customer data in three countries. As complexity grows, an engineering team's capacity to manually detect anomalous behavior runs out.

The fourth trigger — and the most honest one — is the recurring incident. If the same category of attack (phishing with account compromise, scanning of exposed APIs, unauthorized access to data) happens more than once, it is a sign that the preventive controls are not enough and that you need to detect and respond before the next occurrence escalates.

In-house SOC versus SOC-as-a-Service: the real cost calculation

Building a functional in-house SOC requires, at minimum, four analysts to cover 24x7 shifts (two on the main shift, coverage on weekends and holidays), a SIEM engineer to keep correlation rules updated, and a security coordinator for incident management and reporting. Adding up market salaries in Brazil for professionals with SOC Analyst, GCIH, or GCFE certifications, plus SIEM, SOAR, and threat intelligence feed licenses, the annual cost lands between R$1.5 million and R$3 million — not counting the indirect costs of turnover in a market with a shortage of professionals.

A SOC-as-a-Service or MDR (Managed Detection and Response) delivers the same operational outcome — trained analysts monitoring your environment, detection rules updated against the latest threats, response playbooks, and executive reports — with monthly costs that vary according to data volume and environment complexity. For startups, the subscription model eliminates turnover risk, covers weekend coverage gaps, and scales alongside growth without requiring re-hiring.

The choice between in-house and as-a-service is rarely technical — it is financial and strategic. Companies that reach IPO or that operate in sectors with severe regulation (defense, critical healthcare, systemic financial infrastructure) eventually bring part of the SOC in-house for reasons of control and sovereignty. For most growing startups and scale-ups, MDR is the correct answer for at least the first four to six years.

Metrics that matter: MTTD and MTTR as selection criteria

MTTD (Mean Time to Detect) measures the average time between the start of an attack and the moment it is identified. According to the IBM Cost of a Data Breach Report 2024, the global average time to detect breaches is 194 days. A well-run SOC should deliver an MTTD under 15 minutes for high-criticality threats covered by known correlation rules, and under 24 hours for low-criticality threats that require manual analysis.

MTTR (Mean Time to Respond) measures the time between detection and effective containment of the threat. The SANS Institute benchmark for mature SOC operations is 4 hours for high-severity incidents. When evaluating a SOC-as-a-Service provider, require contractual MTTD and MTTR SLAs, not just marketing promises. Also ask for false-positive metrics — a SOC that generates excessive noise drains the engineering team as much as having no monitoring at all.

Beyond MTTD and MTTR, track the number of confirmed incidents per month (to calibrate your environment's real risk), detection coverage (the percentage of your stack's vectors covered by active rules), and how often the threat intelligence rules are updated. A SOC that does not update rules against new CVEs in under 48 hours is not operating with current threat intelligence.

How Decripte operates a 24x7 SOC for startups without building a team

Decripte offers a managed SOC and MDR for startups and companies of any size — from 1 to more than 100,000 employees — without the client having to hire, train, or retain security analysts. The model covers continuous monitoring of endpoints, cloud, identity, and applications, with integrated response playbooks and executive reports tailored for founders and boards.

For companies still building the foundation, Decripte offers the free Threat Management plan, which delivers an attack-surface assessment via OSINT intelligence and lets the team evaluate its current posture before any commitment. When the assessment indicates that a SOC makes sense — by the triggers described in this article — the transition to the 24x7 SOC plan is direct, with no need to switch vendors or reconfigure integrations.

Startups that reach the SOC stage with the foundation in place (MFA, EDR, backup, logs, vulnerabilities, and an IR plan) get far more value from monitoring: less noise, more precise alerts, and faster response. Decripte accompanies this journey from the free assessment to a mature security operation, with metric transparency and no long-term lock-in.

Practical checklist

1. 1

   1. Assess whether your security foundation is in place

   Before any decision about a SOC, verify that MFA is active on all critical access, that there is EDR on managed devices, that backups have been tested in the last 90 days, and that cloud and authentication logs are centralized. If any of these controls is missing, prioritize it — the return per real invested is greater than any advanced monitoring.

2. 2

   2. Identify whether there is a regulatory or contractual trigger

   Check whether your operation falls under Resolution CMN 4.893 (fintechs), whether contracts with enterprise clients require evidence of 24x7 monitoring or response SLAs, or whether the volume and sensitivity of the data you process creates a practical obligation under the LGPD. Regulatory and contractual triggers make the SOC a legal necessity, not just a technical one.

3. 3

   3. Map your current attack surface

   Inventory every internet-facing system (applications, APIs, admin panels), every cloud and SaaS provider with access to critical data, and every integrator and partner with access to your environment. An unmapped attack surface is unmonitorable — the SOC needs a defined scope to operate effectively.

4. 4

   4. Define target metrics before hiring

   Establish the benchmarks you need to hit: the maximum acceptable MTTD for high-criticality threats, the MTTR for containment, the frequency of executive reports, and the escalation criteria for the engineering team. These criteria should appear in the contract with the SOC-as-a-Service provider as verifiable SLAs — not as informal expectations.

5. 5

   5. Compare total cost of ownership: in-house versus MDR

   Calculate the real cost of an in-house SOC: salaries for four analysts for 24x7 coverage, a SIEM engineer, platform licenses, training, and annual turnover cost. Compare it with an MDR proposal for the same scope. In almost every case for startups below 500 employees, MDR delivers equivalent or superior coverage at 60% to 80% lower cost.

6. 6

   6. Start with Decripte's free assessment

   Use Decripte's free Threat Management plan to get an assessment of your attack surface via OSINT intelligence before any commitment. The assessment identifies gaps in the foundation, exposes exposed assets you may not know about, and provides the context you need to decide whether — and when — a 24x7 SOC makes sense for your current stage.

7. 7

   7. Hire the 24x7 SOC with structured onboarding

   When hiring the SOC, require an onboarding process that includes inventorying and integrating all relevant log sources, creating playbooks specific to your technology stack, defining escalation to the internal team, and reviewing correlation rules against the most likely vectors for your sector. A SOC that starts operating with generic rules takes months to reduce the noise to an operational level.

Frequently asked questions