Once clients start asking about security, the next question is usually which standard to pursue. ISO 27001 and SOC 2 are the two most commonly requested, and founders often assume they need both straight away. In most cases you need one first, and the choice depends far more on your clients than on the standards themselves.
What each one is
ISO 27001 is an international standard for an information security management system. You define the scope, assess your risks, select controls to treat them, and show that you run the system consistently. An accredited certification body audits you and, if you pass, issues a certificate. The certificate covers a three-year cycle, with surveillance audits in the years between.
SOC 2 is an attestation framework developed by the American Institute of Certified Public Accountants. A licensed CPA firm examines your controls against the Trust Services Criteria, which always include security and can also cover availability, confidentiality, processing integrity and privacy. The result is a detailed report rather than a certificate. A Type 1 report looks at whether your controls are designed properly at a single point in time. A Type 2 report tests whether they actually operated over a period, typically between three and twelve months.
Start with where your clients are
This is usually the deciding factor. SOC 2 is the standard most commonly requested by clients in the United States, particularly in technology and SaaS. ISO 27001 is more widely recognised in Europe, the United Kingdom, Asia and the Middle East, and is often named in tenders and government or banking procurement.
If your sales pipeline is mostly North American technology companies, SOC 2 is likely to be the more useful first step. If you sell across Asia, Europe or into regulated sectors, ISO 27001 is usually the better choice. Look at the questionnaires and contract clauses you have already received, because they often state which standard the client prefers.
How the effort compares
The underlying work is similar. Both expect access control, risk assessment, supplier management, incident response, staff awareness and evidence that these things happen in practice. A company that has done the groundwork for one standard has done a large part of the work for the other.
The differences are mostly in how you are assessed. ISO 27001 places more weight on the management system itself: documented risk assessment, defined responsibilities, internal audit and management review. SOC 2 Type 2 places more weight on evidence collected over time, so you need your controls running, and their records kept, for the whole observation period before the report can be issued.
What smaller companies often get wrong
- Choosing a standard because a competitor has it, rather than because their own clients ask for it.
- Starting with tools and templates before understanding their own risks, which produces policies nobody follows.
- Scoping too widely. A focused scope that covers the product and data clients care about is quicker to achieve and easier to maintain.
- Treating certification as the finish line. Clients will keep asking questions, and auditors will return.
Can you do both?
Yes, and many companies eventually do, often by building one set of controls and mapping it to both frameworks. The sensible order is to pursue the standard your current clients need, run it properly for a period, and then extend to the second when the market demands it.
If you are unsure which one your clients expect, or whether you need either yet, a short assessment of your current position and your sales pipeline will usually make the answer clear. Certification is valuable when it helps you win and keep clients, and it should be planned around that.