Cybersecurity for startups: build secure from day one

Security debt is like technical debt: cheap to ignore in the short term, very expensive in the long run. With ethical hacking and real penetration testing, we help startups and SaaS build secure products, meet enterprise customer requirements and pass investor due diligence.

Why does security matter from day one at a startup?

A startup that suffers a breach before its Series A can see its fundraising process derailed. An enterprise customer that discovers critical vulnerabilities during a security review can block the deal. And a data breach affecting users can mean the end of the business. The cost of fixing vulnerabilities in production is 30 times higher than catching them during development.

What a tech startup needs

  • Ethical hacking and product penetration testing: MVP, SaaS, API, web or mobile application
  • Secure SDLC: building security into the development process from the start
  • Security review for investor due diligence (Series A/B)
  • Security reports for enterprise customer contracts
  • SOC 2 Type II or ISO 27001 compliance as a competitive advantage
  • Product threat modeling to identify design risks
  • Third-party and dependency review (supply chain security)
  • Technical team training: OWASP Top 10, secure coding

Our approach for startups

  1. Security kickoff: We understand your product, your architecture and the security level you need (MVP, growth, enterprise-ready).
  2. Product assessment: Penetration testing of the web, API and/or mobile application depending on scope. Product threat modeling.
  3. Roadmap: A security plan prioritized by impact: what to fix now, what to plan for next quarter.
  4. Documentation: We produce the security documentation you need for due diligence: pentest report, security policy, vulnerability management.
  5. Ongoing support: Available as security consultants as your startup grows and your product evolves.

Deliverables

  • Product penetration test report (executive + technical)
  • Security report for due diligence (investor-ready format)
  • Prioritized security roadmap
  • Product threat model
  • Security policy and vulnerability management
  • Support throughout the investor due diligence process

Startups that work with QuantumSec

  • B2B SaaS companies that need to pass enterprise customer security reviews
  • Fintechs and healthtechs with sensitive user data
  • Startups undergoing fundraising (Series A/B) with security due diligence
  • Companies pursuing SOC 2 or ISO 27001 certification
  • Startups with AI-generated code that need a security review

Frequently asked questions

When is the best time to do a first penetration test?

The first pentest should happen when the product is in beta or before public launch. Waiting until you have traction or real users increases both the risk and the cost of remediation.

Can you help us complete an enterprise customer's security questionnaire?

Yes. It's one of the services most requested by startups. We help you answer security questionnaires (CAIQ, SIG, custom questionnaires) and put together the documentation that backs up those answers.

Do you have experience with startups using AI-generated code or vibe coding?

Yes. Code generated by LLMs tends to reproduce known vulnerability patterns (injections, insecure secret handling, weak validation). We have a dedicated review service for AI-generated code.