If your startup does business internationally — especially in Europe — you’ll likely encounter ISO 27001. It’s the world’s most recognized standard for information security management systems (ISMS), and it’s increasingly a requirement in enterprise procurement.
This guide explains what ISO 27001 involves and how to approach certification practically as a startup.
What Is ISO 27001?
ISO 27001 is an international standard published by ISO (International Organization for Standardization). It specifies requirements for establishing, implementing, maintaining, and continually improving an Information Security Management System (ISMS).
Unlike SOC 2 (which produces a report), ISO 27001 results in a certification issued by an accredited certification body, valid for three years with annual surveillance audits.
ISO 27001 vs SOC 2
| ISO 27001 | SOC 2 | |
|---|---|---|
| Type | Certification | Audit report |
| Scope | International | Primarily U.S. |
| Validity | 3 years (with annual surveillance) | 12 months typically |
| Framework | Prescriptive (Annex A controls) | Flexible (Trust Services Criteria) |
| Best for | European / global customers | North American customers |
Many startups pursue both. The security controls overlap significantly, so the incremental effort for the second framework is much lower.
The ISO 27001 Certification Process
1. Get management buy-in
ISO 27001 explicitly requires top management commitment. Leadership must define the ISMS scope, allocate resources, and review results. At a startup, this usually means the CEO or CTO formally sponsors the initiative.
2. Define your ISMS scope
Determine which parts of your organization, systems, and locations are covered. For most SaaS startups, the scope is your product, the infrastructure it runs on, and the team that builds and operates it.
3. Perform a risk assessment
Identify information security risks, assess their likelihood and impact, and decide how to treat each one (mitigate, accept, transfer, or avoid). This risk assessment drives everything else in your ISMS.
4. Implement Annex A controls
Annex A of ISO 27001:2022 contains 93 controls organized into four themes:
- Organizational (37 controls) — Policies, roles, supplier management
- People (8 controls) — Screening, training, remote work
- Physical (14 controls) — Office security, equipment disposal
- Technological (34 controls) — Access control, encryption, logging, secure development
Not every control applies. You’ll create a Statement of Applicability (SoA) that documents which controls you use and why you excluded any.
5. Document your ISMS
ISO 27001 requires documented policies, procedures, and records. Key documents include:
- Information security policy
- Risk assessment methodology and results
- Statement of Applicability
- Risk treatment plan
- Internal audit procedure
- Management review records
6. Run an internal audit
Before the certification audit, conduct your own internal audit to identify gaps. This can be done by a knowledgeable team member or an external consultant. Fix any non-conformities found.
7. Certification audit (Stage 1 + Stage 2)
Stage 1: The auditor reviews your documentation and confirms your ISMS is ready for a full audit. Stage 2: The auditor tests whether your controls are actually implemented and effective. If you pass, you receive your ISO 27001 certificate.
How Long Does ISO 27001 Take?
For a startup building an ISMS from scratch: 4–8 months for implementation, then 1–2 months for the audit process. Total: roughly 6–10 months.
Frequently Asked Questions
How much does ISO 27001 certification cost?
For a small startup, expect $10,000–$30,000 for the certification audit, plus internal time for implementation. Costs scale with company size and scope complexity.
Do I need ISO 27001 if I already have SOC 2?
It depends on your customers. European enterprises often require ISO 27001 specifically. If you already have SOC 2, you’ve done most of the work — the delta is mainly documentation format and the formal ISMS structure.
Can I use Complara to track ISO 27001?
Yes. Complara includes a complete ISO 27001 checklist mapped to Annex A controls. You can track implementation progress, attach evidence, and generate readiness reports — all in one place.