SOC 2 vs ISO 27001: two frameworks, one question from procurement. Here is which one your startup actually needs first.
TL;DR
SOC 2 gives you a report; ISO 27001 gives you a certificate. SOC 2 is the US default, examined by a licensed CPA firm. ISO 27001 is the international standard, issued by an accredited certification body.
For most startups the tiebreaker is geography, not philosophy: US buyers ask for SOC 2, European and APAC buyers ask for ISO 27001. Start with whichever unblocks your pipeline, the security work underneath is largely shared.
On this page
SOC 2 vs ISO 27001: the core difference
Strip away the detail and it comes down to what you walk away with. SOC 2 gives you a report. ISO 27001 gives you a certificate. That difference shapes everything else.
Side by side
A quick note on versions: the current standard is ISO 27001:2022, which organises 93 Annex A controls into four themes. The older 2013 version has been retired, so make sure any ISO work targets the 2022 revision.
| SOC 2 | ISO 27001 | |
|---|---|---|
| What you get | An attestation report | A formal certification |
| Issued by | Licensed CPA firm | Accredited certification body |
| Governing body | AICPA (US) | ISO / IEC (international) |
| Strongest in | United States | Europe, APAC, Middle East |
| Core requirement | Controls meet Trust Services Criteria | A working ISMS + risk assessment |
| Shareability | Private, shared under NDA | Certificate can be displayed publicly |
| Validity | Covers a period, renewed roughly yearly | Three years, with annual surveillance audits |
The regional split that usually decides it
For most startups, the honest tiebreaker is not philosophy, it is geography. Ask your sales team what prospects actually request, and the answer usually settles the whole debate.
Selling to US companies
SOC 2 is what shows up in their questionnaires. It is the default expectation.
Europe, APAC, Middle East
ISO 27001 is the recognised name, and multinationals often require it.
Selling to both
You will likely need both eventually. Start with whichever unblocks your current pipeline.
Which to choose first
If you want the plain calls without weighing every factor, here they are.
Why doing one makes the other easier
These frameworks are not separate universes. The large majority of their underlying security controls overlap, things like access control, encryption, logging, incident response, and vendor management. Build the security once and most of it counts toward both.
Do you need both?
Eventually, maybe. Plenty of companies that sell across regions end up holding both, and healthtech or heavily regulated startups often need both plus something like HIPAA. But you almost never need both on day one. Start with the one your buyers are asking for, and add the second when a second market demands it.
The shortcut for lean teams: build the security once
Notice the pattern across this whole guide. Both frameworks want the same thing underneath: real security controls, running, with evidence to prove it. The framework is just how that proof gets packaged.
| What decides your speed | With Osto | Compliance tool + separate security |
|---|---|---|
| Are the security controls ready to run? | Built into the platform | You assemble them first |
| Covers SOC 2 and ISO 27001? | Both, plus 200+ frameworks | Depends on the tool |
| Where does the evidence come from? | Osto’s own modules | Integrations you build and maintain |
| Reuse controls across frameworks? | One posture, mapped many ways | Manual re-mapping |
| Need a security hire? | No | Usually yes |
One security posture, mapped to both frameworks.
Osto is a one-stop cybersecurity and compliance platform for growing companies. Build the controls once on one platform, and map the same posture to SOC 2, ISO 27001, and 200+ frameworks, with the evidence collected in the same place. Get ready in about 115 days.
Frequently asked questions
What is the difference between SOC 2 and ISO 27001?
SOC 2 is a US-born attestation report where a licensed CPA firm gives an opinion on your security controls, shared privately with buyers. ISO 27001 is an international certification, issued by an accredited body, that certifies a working Information Security Management System and can be displayed publicly.
Which should a startup get first, SOC 2 or ISO 27001?
Usually whichever your buyers request. US-focused startups typically start with SOC 2; those selling into Europe, APAC, or the Middle East start with ISO 27001. The underlying security work is largely shared, so the first one makes the second easier.
Do the two frameworks overlap?
Substantially. The large majority of their underlying controls, access control, encryption, logging, incident response, vendor management, overlap. Teams holding one usually find the second far easier to add.
Do I need both SOC 2 and ISO 27001?
Rarely on day one. Companies selling across regions often end up with both over time, and regulated startups may need both plus a law like HIPAA. Start with the one your buyers ask for and add the second when a new market requires it.
Which ISO 27001 version applies?
ISO 27001:2022, which organises 93 Annex A controls into four themes. The older 2013 version has been retired, so any ISO 27001 work should target the 2022 revision.