ISO 27001 vs SOC 2: Which Does Your Business Need?

ISO 27001 and SOC 2 both demonstrate that your organisation manages information security properly, but they work differently and suit different markets. The question I’m asked most often is “which one do we actually need?”, and the honest answer is that it’s usually driven by whoever you’re selling to, not by which framework is technically superior. If a customer has asked for one or the other, here’s how to decide, and why you often don’t have to choose.

Consultant comparing ISO 27001 and SOC 2 — ISO 27001 is issued by a JAS-ANZ accredited certification body, while SOC 2 reports are issued by a licensed CPA firm rather than a certification body.

The short answer

ISO 27001 is an internationally recognised, certifiable management-system standard. SOC 2 is a US attestation report produced by a CPA firm. Australian and international buyers generally recognise ISO 27001; US customers often specifically ask for SOC 2.

Key differences

What it is: ISO 27001 is a certification against a standard; SOC 2 is an auditor’s attestation report against the AICPA Trust Services Criteria
Recognition: ISO 27001 is global; SOC 2 is strongest in the US market
Output: ISO 27001 gives you a certificate; SOC 2 gives the customer a detailed report
Who issues it: a JAS-ANZ accredited certification body for ISO 27001; a licensed CPA firm for SOC 2

Which do you need?

If your customers are mostly Australian, international or government, ISO 27001 is usually the better-recognised choice. If you sell to US enterprise customers who specifically request SOC 2, you’ll likely need it. Many growing tech companies end up needing both, which is where a single, well-built information security management system pays off.

One system, both outcomes

ISO 27001 and SOC 2 overlap heavily on controls. When I map the two side by side, the large majority of an organisation’s controls end up satisfying both frameworks at once. It’s the reporting format and who signs off, not the underlying security work, that really differs. The most cost-effective path is usually to build a strong ISO 27001 base and map it across to the SOC 2 Trust Services Criteria, rather than running two separate programs. Streamline helps Australian businesses do exactly that, implementing or auditing ISO 27001 and preparing you for SOC 2, led by an experienced information security auditor.

Frequently asked questions

Is ISO 27001 or SOC 2 better?

Neither is universally better. It depends on your market. ISO 27001 is the global certification; SOC 2 is favoured by US customers. The right choice is whatever your buyers and tenders actually require.

Can one system cover both ISO 27001 and SOC 2?

Yes. The two share most controls, so a single information security management system can support both, usually starting from an ISO 27001 base and mapping across to SOC 2.

Speak with an experienced ISO auditor

Not sure which your customers need? Email hello@streamline.business or call us:

Brisbane 07 3667 8280
Sydney 02 8315 7780
Melbourne 03 9034 3990

General guidance only. This article is general information, not legal, financial, safety or compliance advice, and it does not take account of your specific circumstances. Streamline ISO Consultants are ISO management-system consultants, not lawyers or licensed advisers. Standards, laws and regulator guidance change, and details were correct only at the time of writing. Always seek professional advice before acting. See our full Disclaimer.