ISO 27001 for Startups and Software Companies

Most startups and software companies need ISO 27001 for one reason: a customer asks for it. Enterprise buyers, banks and public sector bodies put ISO/IEC 27001:2022 in their supplier due diligence, and a missing certificate can stall a deal at procurement. The good news is that a small, cloud-based team can build a lean information security management system (ISMS) without hiring a compliance department.

This guide covers how to scope ISO 27001 for a startup, what a minimum viable ISMS looks like, the timeline and cost drivers, the secure development controls that matter most for software companies, and when SOC 2 is the better fit.

Do startups need ISO 27001?

Usually only when enterprise or public sector buyers ask for it. No UK law requires ISO 27001 certification, so for a startup it is a commercial decision: it becomes worth doing when the certificate unlocks contracts, shortens security questionnaires or satisfies an investor’s due diligence.

If the signals are not there yet, our guide to what ISO 27001 is explains the standard so you can plan ahead.

How to scope ISO 27001 for startups and SaaS products

Scope the ISMS around what your customers buy: usually the product, the cloud platform it runs on and the people who build and support it. A clear, honest scope keeps the work proportionate and still gives buyers the assurance they want.

A scope that is too narrow, such as one microservice, rarely satisfies a buyer who wants assurance about the whole product. A scope that is too wide, such as every internal tool and team, adds work without adding assurance. Write a scope statement a customer would recognise.

What is a minimum viable ISMS?

A minimum viable ISMS is the smallest set of documents, processes and records that meets every clause of the ISO 27001 requirements for your scope, and nothing more. It is still a complete ISMS: none of clauses 4 to 10 can be left out.

For a startup, that typically means:

• A scope statement (4.3) and a short record of your context and interested parties.
• An information security policy (5.2) and the few topic-specific policies your Statement of Applicability needs, such as access control, acceptable use, secure development and supplier security.
• A risk assessment and treatment process (6.1.2, 6.1.3) with a risk register you actually use.
• A Statement of Applicability covering all 93 Annex A controls, with a reason for each inclusion and exclusion.
• Security objectives (6.2) with an owner, a measure and a date.
• Records that the controls run: access reviews, onboarding and leaver checks, training, incidents, supplier reviews, backups and change approvals.
• An internal audit (9.2) and a management review (9.3) before the certification audit.

Use the tools you already have. Your ticketing system, code repository and identity provider can hold most of the evidence, so the ISMS becomes part of how you work rather than a separate filing exercise. Our free ISO 27001 checklist helps you track readiness against each clause, and the free ISO 27001 toolkit gives you a short information security policy to adapt rather than a stack of documents nobody reads.

How long does ISO 27001 take for a startup?

For a small, cloud-based team, about three to six months from start to certificate. Teams that already hold Cyber Essentials and use single sign-on and managed devices are at the shorter end.

What slows startups down is rarely the documents. It is controls switched on too late to produce records, an unclear scope, or a founder who has no time to make decisions. Our ISO 27001 implementation guide sets out each step in detail.

What does ISO 27001 cost a startup?

There is no fixed price; the cost depends on a handful of drivers. The total has two parts: the certification body’s audit fees over the three-year cycle, and any consultancy, tools and staff time you put in.

Our ISO 27001 certification cost guide breaks down each fee over the three-year cycle, and we give you a quote for your scope after a short call.

ISO 27001 for software development: Annex A 8.25 to 8.29

For a software company these five controls carry most of the extra ISO 27001 work, and auditors look at them closely. They are about showing that security is built into how you design, code, test and release, not bolted on.

Related controls usually apply too: 8.4 (access to source code), 8.30 (outsourced development), 8.31 (separation of development, test and production environments), 8.32 (change management) and 8.33 (test information). Our guide to ISO 27001 Annex A controls explains all 93.

Penetration testing evidence for A.8.8 and A.8.29

ISO 27001 does not name penetration testing as a requirement, but two controls expect you to find and fix weaknesses: 8.8 (management of technical vulnerabilities) and 8.29 (security testing in development and acceptance). For a SaaS product, an application and API test of the production or a production-like environment is usually the clearest evidence, together with a record of how each finding was fixed.

Time the test so the report and your remediation records exist before Stage 2. Our ISO 27001 penetration testing page explains how to scope a test that gives auditors what they ask for.

Should you start with Cyber Essentials?

Often, yes. Cyber Essentials covers five technical controls (firewalls, secure configuration, user access control, malware protection and security update management) and often takes days or weeks rather than months. It answers smaller customers’ questions now, and its evidence feeds straight into Annex A controls such as 8.7, 8.8, 8.9 and 8.20 when you move to ISO 27001. Our comparison of Cyber Essentials vs ISO 27001 shows how the two fit together.

ISO 27001 or SOC 2 for a SaaS company?

If you are weighing ISO 27001 for SaaS against SOC 2, follow your customers. UK, European and international buyers usually ask for ISO 27001, while North American buyers often ask for a SOC 2 report; many SaaS companies end up with both, because the controls overlap heavily. ISO 27001 leads to a certificate from a certification body, while SOC 2 is an attestation report that only a licensed CPA firm can issue, so Sovereign Secure does not issue SOC 2 reports. Our comparison of ISO 27001 vs SOC 2 sets out the differences and how to do both from one set of evidence.

Why Sovereign Secure

• ISO 27001 certified ourselves, so we run the same ISMS routine, internal audits and surveillance audits we prepare clients for.
• Preparation and certification kept separate. Our ISO 27001 consultancy takes you from gap analysis to audit-ready; certificates are issued by our partner certification body, MQA International.
• Testing from the same provider for Annex A 8.8 and 8.29, from web application and API penetration testing to vulnerability scanning.
• Cyber Essentials as a stepping stone. As an IASME-licensed Cyber Essentials certification body, we can certify Cyber Essentials directly while you build towards ISO 27001.
• UK company since 2012, headquartered in Accrington, Lancashire (Companies House 08334453).

Next step

Tell us your headcount, your product and cloud platform, the customer or deadline driving the project and any certificates you already hold. We will scope a lean ISMS and send a quote. Use the form below, which is already set to ISO 27001, or call +44 161 523 5276.