If you run an MSP and clients have started asking “are you SOC 2 or ISO 27001 certified?”, you’re not alone — and the honest answer is that most MSPs eventually need to understand both, even if they only pursue one to start.
Here’s the practical version of this decision, without the vendor sales pitch.
The one-line difference
ISO 27001 is a certification you earn by building an Information Security Management System (ISMS) and passing an audit against an international standard. SOC 2 is an attestation report — a US accounting-framework (AICPA) audit opinion on whether your controls, as you’ve defined them, actually operated as described over a period of time.
That difference matters more than it sounds: ISO 27001 certifies you against a fixed, universal set of controls (Annex A). SOC 2 lets you define your own controls against five possible Trust Services Criteria, then gets audited on whether you actually followed them. Two companies with wildly different security postures can both be “SOC 2 compliant” — which is exactly why enterprise buyers increasingly want ISO 27001 alongside or instead of it.
Side-by-side
| ISO 27001 | SOC 2 | |
|---|---|---|
| What it is | Certification against an international standard | Auditor’s attestation report (Type I or II) |
| Governing body | ISO (international) | AICPA (United States) |
| Recognised most in | Australia, UK, EU, Singapore, UAE, government & enterprise procurement globally | United States, especially SaaS/tech vendor due diligence |
| Structure | Fixed Annex A control set (93 controls) mapped via a Statement of Applicability | You define controls against chosen Trust Services Criteria |
| Output | A certificate, valid 3 years with annual surveillance audits | A report, typically reissued annually |
| Typical timeline | 8–16 weeks to certificate for a small-mid MSP | Type I: weeks. Type II: 3–12 month observation window, then audit |
What your clients are actually asking for
This is the part MSPs get wrong most often — chasing the “wrong” certification for their actual client base.
- Australian, UK, EU, or government-adjacent clients: almost always mean ISO 27001 when they say “certified,” even if they use the word “compliant” loosely.
- US-based clients, especially SaaS vendors and their procurement/security teams: more likely to specifically request a SOC 2 Type II report as part of vendor due diligence.
- Enterprise deals of any geography: increasingly ask for ISO 27001 specifically, because it’s a real certification with an accredited third-party audit behind it, not a self-scoped report.
If your client base is majority Australian or international outside the US, ISO 27001 is very likely the right first move. If you’re chasing US SaaS clients specifically and they’re naming SOC 2 in their vendor questionnaires, that changes the calculus.
Cost and effort reality check
Neither is cheap in time or money, and neither is a checkbox exercise done properly. Roughly:
- ISO 27001 requires more structural work up front (the ISMS, risk assessment, Statement of Applicability) but has a defined finish line — a certificate — and a predictable 3-year cycle after that.
- SOC 2 Type II requires less upfront documentation structure but demands your controls actually operate correctly for months before the audit even happens — you can’t “fast-track” the observation window by paying more.
Consultants pricing SOC 2 as a fast, cheap alternative to ISO 27001 are usually only talking about Type I, which most enterprise clients won’t accept as sufficient evidence on its own.
The sequencing that works for most MSPs
If you genuinely need both eventually — common for MSPs serving mixed AU/US client bases — build ISO 27001 first. The reasoning is practical, not dogmatic: ISO 27001’s Annex A controls substantially overlap with SOC 2’s Trust Services Criteria. Once your ISMS, risk register, and control evidence exist for ISO 27001, mapping that same evidence to a SOC 2 audit is considerably less work than starting a second compliance program from a blank page.
Doing it in the other order — SOC 2 first, ISO 27001 later — works too, but MSPs who lead with SOC 2 sometimes end up rebuilding governance structures (a real ISMS, a real risk assessment methodology) that SOC 2’s more flexible framework didn’t force them to build the first time.
A simple decision framework
- List your actual pipeline — not hypothetical future clients, the deals currently stalled on a security question.
- Check what they’re asking for by name. “ISO 27001 certified” and “SOC 2 compliant” are not interchangeable answers to a procurement questionnaire.
- If it’s mostly ISO 27001 requests (or you’re not sure), start there. It’s the broader, more internationally recognised credential and the stronger foundation if you need both eventually.
- Only add SOC 2 reactively, when a specific US client’s procurement process genuinely requires it — not speculatively.
If you want help working out which one actually unblocks your pipeline, book a free consultation and we’ll go through your specific client list rather than guess in the abstract.