Cybersecurity services for businesses

From an initial vulnerability assessment to compliance with the NIS2 directive, we cover the full offensive security and regulatory cycle your business needs.

Why outsource technical cybersecurity?

Building an in-house offensive security team is prohibitively expensive for most companies. A senior penetration tester in Spain costs more than €50,000 a year, and the specialization you need —web, network, Active Directory, cloud— is rarely found in a single person. We give you a team with over 10 years of experience, without the burden of hiring or ongoing training.

What we cover

  • Web, API and mobile application penetration testing
  • Internal network, perimeter and Active Directory penetration testing
  • Source code audit (Secure Code Review)
  • Phishing and social engineering simulations
  • NIS2, DORA, ENS and ISO 27001 compliance
  • Technical training and cybersecurity awareness

How we work

  1. Initial call: We learn about your business, your critical assets and your current exposure level.
  2. Tailored proposal: We design the exact scope of the service: no generic packages, no charges for what you don't need.
  3. Technical execution: The team works in a coordinated way, without disrupting your operations.
  4. Report and closing: We deliver an executive report and a technical report. We explain every finding and the roadmap to fix it.
  5. Post-delivery support: We answer questions during remediation. If needed, we can run a re-test.

Deliverables for every service

  • Executive report for management (no technical jargon)
  • Detailed technical report with evidence (PoC)
  • Findings classified by severity (Critical / High / Medium / Low)
  • Concrete remediation recommendations
  • Closing meeting to answer questions

Companies that work with us

  • SaaS and tech startups that need to prove their security to investors or enterprise clients
  • E-commerce businesses with online payment security obligations
  • Financial, healthcare or utilities companies subject to NIS2 or DORA
  • Public entities that must comply with the Spanish National Security Framework (ENS)
  • Companies with Microsoft environments looking to protect their Active Directory

Frequently asked questions

Do we have to sign a long-term contract?

No. Most of our services are closed projects with a concrete deliverable. If there's an ongoing relationship, it's formalized through a managed service agreement, always with defined terms and a flexible exit.

Do you work with companies of all sizes?

Yes. We have clients ranging from 5-person startups to Ibex35 companies. We adapt the scope and price to each organization's reality.

What sets QuantumSec apart from other cybersecurity companies?

Offensive specialization and closeness. We're not a generalist integrator. We're a technical team that understands the language of attackers, translates it into business terms and supports the client throughout the process, not just when we deliver the report.

How do you guarantee confidentiality?

We sign an NDA before starting any work. All access and tests are documented and carried out strictly within the agreed scope.