ISO 27001 vs SOC 2: A Detailed Differences Guide

Posted in Healthcare Compliance

Iso 27001 vs soc 2, which one should a healthcare company go after first? SOC 2 is a report from a licensed CPA firm that checks whether your security controls actually worked over time, and it’s mainly a USA requirement. ISO 27001 is an international certification that checks whether you have a real, ongoing system for managing security, and it carries more weight outside the US. Healthcare had the highest average data breach cost of any industry in 2025, $7.42 million. That’s exactly why hospitals, payers, and health tech buyers are focused on a vendor’s security credentials before they’ll sign anything. We’ll walk through what each framework checks, where they overlap, where they diverge, and how to actually decide.

Difference Between SOC 2 and ISO 27001

	ISO 27001	SOC 2
What you get	A certificate	A detailed report
Who audits it	An accredited certification body	A licensed CPA firm
Where it’s expected	Europe, UK, APAC	Mainly the US
Can you share it publicly	Yes	No, usually under NDA
Structure	93 possible controls (Annex A), scoped via a Statement of Applicability	5 Trust Services Criteria, only Security is mandatory
Report types	One certification	Type I (a snapshot) and Type II (over time)
Typical cost	$25,000–$80,000	$20,000–$60,000
Typical timeline	3–6 months setup, then certification	6–12 months of evidence collection for Type II
Renewal	3-year cycle, annual surveillance audits	Usually renewed every year

What is SOC 2?

SOC 2 stands for Systems and Organization Controls 2. It’s a report, not a certification, built by the AICPA and issued only by a licensed CPA firm. 

The audit checks your company against five possible Trust Services Criteria: 

• Security
• Availability
• Confidentiality
• Processing Integrity
• Privacy

Security is the only one every SOC 2 report has to include; the rest get added based on what your product actually does.

Understanding the Difference: SOC 2 Type I vs. Type II

The most common source of confusion surrounding SOC 2 compliance is the distinction between a Type I and a Type II report. The difference lies in the timeframe and the depth of the audit.

• SOC 2 Type I (Design Assessment): This report represents a snapshot in time. It evaluates whether an organization has properly designed security controls in place on one specific day. It proves that the company understands security requirements and has established the necessary policies, but it does not measure whether those policies are consistently followed.
• SOC 2 Type II (Operational Effectiveness): This is a longitudinal assessment. The auditor monitors the organization over a sustained period, like six to twelve months. During this window, the auditor requests extensive evidence (such as system logs, access reviews, and employee onboarding records) to verify that the security controls actually functioned as intended every single day.

Why Enterprise Buyers Require SOC 2 Type II

For clients in highly regulated industries, such as healthcare or finance, a Type II report is the industry standard. It provides enterprise buyers with the tangible assurance they need, proving that a vendor doesn’t just have security policies on paper, but actively and consistently enforces them throughout their daily operations.

What is ISO 27001?

ISO 27001 is an international standard, jointly maintained by ISO and the International Electrotechnical Commission, that lays the foundation to build and run an information security management system, or ISMS. 

Rather than checking a list of individual controls, it checks whether you have a functioning, ongoing process: find risks, apply controls, review what’s working, repeat.

An accredited certification body performs the audit and issues a certificate, valid for three years, with a lighter surveillance audit every year in between. The current version, ISO/IEC 27001:2022, lists 93 possible controls under Annex A. 

SOC 2 and ISO 27001 Similarities 

• Both are built around the same core idea of proving to a customer or partner that you can be trusted with their data.
• They require an independent, outside audit. Nobody self-certifies either one.
• Both cover the same basic security ground: access control, encryption, incident response, vendor management, employee training.
• The technical control overlap is significant; most estimates put it at 70 to 80%, which is why a company that has one usually finds the other faster to get.
• Neither one is legally required; both are voluntary.

 

ISO 27001 vs SOC 2 

Who Needs It

• SOC 2 is the default in the US. If your buyers are US hospitals, health plans, or provider groups, a current SOC 2 Type II report is what their vendor risk team expects to see, and it’s what shows up in nearly every enterprise RFP. 
• ISO 27001 is more important in Europe, the UK, or Asia-Pacific. Healthcare buyers there are far less likely to even ask about SOC 2, because it’s not part of how procurement works in their region.

Function 

• SOC 2 gives you room to shape the audit around your own systems. Outside of Security, you pick which Trust Services Criteria apply, and you design controls that fit your specific service. 
• ISO 27001 is more rigid; the 93 Annex A controls are the starting point for everyone, and if you skip one, you have to formally justify why in your Statement of Applicability.

Outcome

• ISO 27001 produces a certificate. You can post it on your website, drop it into a sales deck, reference it in an RFP response without asking anyone’s permission. 
• SOC 2 produces a long, detailed report. It is shared privately, usually under NDA, because it contains specifics about your actual control environment that most companies don’t want publicly available.

Cost of Getting ISO 27001 vs SOC 2

• SOC 2 Type II typically runs $20,000–$60,000 in audit fees, on top of internal effort, with 6–12 months of evidence collection before the first report exists.
• ISO 27001 typically runs $25,000–$80,000 across the two-stage certification audit, with 3–6 months of setup work beforehand, followed by three years of validity and annual surveillance audits.

HIPAA+ISO 27001+SOC 2: How They Fit Together

Getting SOC 2 or ISO 27001 does not make a health tech company HIPAA compliant. HIPAA is a federal law and applies to covered entities and their business associates; it is mandatory. 

SOC 2 and ISO 27001 are both voluntary. A company pursues them to prove its security is solid, not because a regulator requires it. Neither framework covers the specific administrative, physical, and technical safeguards HIPAA lays out, and neither one takes the place of a signed Business Associate Agreement.

What they actually do well is give a hospital’s compliance team something concrete to work with. If a health system is evaluating a new patient-facing platform, they still need a BAA, and they still need to check how that vendor handles PHI specifically. 

But walking in with a current SOC 2 Type II report or an ISO 27001 certificate speeds that review up considerably, because it answers “how do you actually run security” with third-party evidence instead of a vendor just saying “trust us.”

SOC 2 compliance vs ISO 27001: The Framework For You

A few questions to work through before committing to either one:

Where are your customers based? 

If your target is entirely US hospitals, payers, and provider groups, SOC 2 Type II is the one they’re going to ask for. If you’re expanding into EU or UK healthcare systems, ISO 27001 is closer to the baseline expectation there. It fits how GDPR expects companies to handle governance, and it’s increasingly showing up as a supplier requirement as NIS2 enforcement ramps up.

Do you already have a security program, or are you starting from scratch? 

ISO 27001 is a good fit if you want a structured process to build your program around. SOC 2 is more flexible and easier to shape around whatever controls you already have in place.

Are you selling into both US and international healthcare markets? 

Telehealth platforms, clinical data infrastructure, and multi-tenant tools that touch patients in more than one region increasingly end up getting both. Since so much of the underlying control work overlaps, the second certification is usually faster and cheaper than the first, and having both means security review never becomes the reason a deal stalls, regardless of where the buyer sits.

Common Mistakes While Selecting The Framework

• Treating a SOC 2 Type I like a Type II: Type I only confirms controls were designed correctly on one day. It says nothing about whether they held up. For any vendor touching PHI, ask for Type II specifically.
• Not checking what’s actually in scope: A SOC 2 report scoped to “the core platform” might quietly exclude the support tooling or analytics pipeline where PHI actually flows. That gap is worth catching before, not after.
• Accepting the ISO 27001 certificate without asking for the Statement of Applicability: The certificate alone won’t tell you which of the 93 controls were excluded, or why. Ask for it directly.
• Assuming a certification equals HIPAA compliance: It doesn’t, and this gap surfaces during an actual breach investigation, which is the worst possible time to find out.
• Skipping the question of subservice organizations: Most health tech platforms run on AWS, Azure, or GCP and lean on other vendors for parts of their stack.

ISO 27001 Compliant Custom Healthcare Software Development With Folio3 Digital Health

By partnering with Folio3 Digital Health, you can get custom healthcare software developed that not only meets your functional needs but also ensures strict adherence to HIPAA regulations and ISO 27001 compliance standards. This collaborative approach helps implement tailored security measures, risk management strategies, and continuous monitoring to protect sensitive patient data. 

Closing Note

SOC 2 is what US healthcare buyers expect, and it’s the faster path if your business is domestic. ISO 27001 carries more weight internationally and signals a longer-term, more structured approach to security. You need HIPAA compliance on its own since it is mandatory and neither replaces a proper BAA nor a PHI-specific risk review; those still have to happen separately, every time. 

Frequently Asked Questions

1. Is ISO 27001 or SOC 2 better for a healthcare company? 

It comes down to your customers. US hospitals, payers, and provider groups usually expect SOC 2 Type II. Healthcare buyers in Europe, the UK, or Asia-Pacific usually expect ISO 27001. Companies serving both regions often end up pursuing both frameworks over time.

2. Does SOC 2 or ISO 27001 certification mean a vendor is HIPAA compliant? 

None. Neither framework replaces HIPAA compliance or a signed Business Associate Agreement. They can support a hospital’s own vendor risk review and provide evidence relevant to HIPAA’s security requirements, but any vendor handling PHI still needs its own HIPAA risk analysis and a BAA, regardless of which framework it holds.

3. Can a health tech company pursue both ISO 27001 and SOC 2? 

Yes. The two frameworks share somewhere around 70–80% of their control work; getting the second one after the first is usually faster and less expensive. It’s becoming common among health tech companies selling into both US and international healthcare markets.

4. How long does it take to get SOC 2 or ISO 27001 certified? 

SOC 2 Type II needs six to twelve months of evidence collection before the first report is issued, on top of the setup work to get controls in place. ISO 27001 typically takes three to six months of preparation before the initial two-stage audit, after which the certification holds for three years with annual surveillance audits in between.

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