ISO 27001 vs SOC 2: Which Should Your Startup Get First?

Your prospect just asked: “Are you SOC 2 compliant?”

Two weeks later, another prospect asks: “Do you have ISO 27001 certification?”

Welcome to the startup compliance maze. Both standards sound important, both seem expensive, and you’re not sure which one actually matters for your business.

Here’s how to decide which to pursue first—without wasting months on the wrong certification.

The quick answer: it depends on your customers

But there’s more to consider than just customer location. Let’s break down what each standard actually is and what you’re signing up for.

What ISO 27001 actually is

ISO 27001 is an international standard for information security management systems (ISMS). It’s published by the International Organization for Standardization and recognized globally.

Key characteristics:

• Scope: Your entire information security management system
• Output: Certificate (valid for 3 years with annual surveillance audits)
• Recognition: Global, especially strong in Europe, Asia, and government sectors
• Focus: How you manage security as an organization (policies, processes, risk management)

ISO 27001 says: “We have a systematic approach to managing information security.”

The standard requires you to:

1. Assess your security risks
2. Implement appropriate controls (from Annex A’s 93 controls)
3. Document your processes and policies
4. Continuously monitor and improve your security management system

What SOC 2 actually is

SOC 2 (Service Organization Control 2) is an American auditing standard developed by the AICPA. It’s specifically for service organizations that store customer data.

Key characteristics:

• Scope: Your controls related to the five Trust Service Criteria
• Output: Audit report (Type I or Type II, valid for 1 year)
• Recognition: Primarily North America, especially in tech and finance
• Focus: How you protect customer data based on specific criteria

SOC 2 says: “We have controls in place to protect your data according to these specific criteria.”

The five Trust Service Criteria are:

1. Security - Protection against unauthorized access
2. Availability - System is available for operation as agreed
3. Processing Integrity - System processing is complete, accurate, timely, and authorized
4. Confidentiality - Information is protected from unauthorized disclosure
5. Privacy - Personal information is collected, used, and disclosed appropriately

Most startups pursue SOC 2 with the Security criterion (sometimes called “SOC 2 + Security” or just “SOC 2”).

The practical differences that matter

Timeline and effort

ISO 27001 typically requires more upfront work because you’re building a complete management system, not just implementing controls for specific criteria.

Cost comparison

SOC 2 is generally cheaper upfront, but remember you’ll need annual audits regardless. ISO 27001’s certificate lasts 3 years, with only surveillance audits in years 2 and 3.

Geographic recognition

The overlap: why the second certification is easier

Here’s the good news: ISO 27001 and SOC 2 have roughly 70% overlap in controls.

If you implement ISO 27001 properly, you’ve already covered most SOC 2 requirements:

• Access controls map directly
• Encryption requirements align
• Incident response processes satisfy both
• Risk management approaches are compatible

The difference is mostly in presentation and documentation structure, not in the actual security practices.

Decision framework: which should you get first?

Answer these questions in order:

1. Who are your most important customers?

If you have 3-5 key prospects asking about compliance, ask them directly: “Which certification would be sufficient for your vendor assessment process?” Their answer should drive your decision.

2. Where do you want to be in 3 years?

• Global expansion planned? → ISO 27001
• Focused on US market? → SOC 2
• Selling to government/enterprise? → ISO 27001
• B2B SaaS in US tech? → SOC 2

3. What’s your budget and timeline?

• Need something in 2 months? → SOC 2 (faster implementation)
• Budget constrained first year? → SOC 2 (lower upfront cost)
• Planning for long-term efficiency? → ISO 27001 (3-year certificate)

4. What’s your team’s compliance maturity?

• First time implementing security controls? → SOC 2 (more prescriptive)
• Already have good security practices? → ISO 27001 (builds on what you have)

The hybrid approach: start with one, add the other

Many startups end up with both certifications. Here’s the typical progression:

Path A: ISO 27001 first

1. Implement ISO 27001 (3–6 months)
2. Add SOC 2 reporting (1–2 months additional)
3. Total time: 4–8 months for both

Path B: SOC 2 first

1. Implement SOC 2 (2–4 months)
2. Expand to ISO 27001 (2–4 months additional)
3. Total time: 4–8 months for both

The difference is mostly in sequencing. Path A is more common for globally-focused startups, Path B for US-focused companies.

Common mistakes to avoid

1. Choosing based on what’s “easier”

Neither certification is truly “easy.” Both require significant work. Choose based on business value, not perceived difficulty.

2. Ignoring your actual sales pipeline

If you have prospects asking for SOC 2 today, don’t spend 6 months on ISO 27001 first. Address immediate business needs.

3. Over-engineering the scope

You don’t need to certify your entire company for either standard. Define a tight scope around your core product and supporting infrastructure.

4. Thinking certification equals security

Both certifications are about proving you have processes, not about making you secure. Use the implementation process to actually improve your security, not just to check boxes.

Our recommendation for most startups

Start with whichever your most important prospects are asking for.

If you’re early-stage and don’t have clear prospect requirements yet:

• US-focused B2B SaaS → Start with SOC 2
• Global or enterprise-focused → Start with ISO 27001
• Uncertain about market focus → Start with ISO 27001 (broader applicability)

The key insight: both certifications require similar security practices. The difference is mostly in documentation structure and audit focus. Pick the one that unlocks revenue faster, then plan to add the other within 12-18 months.

Where to start right now

You don’t need to commit to a 6-month certification project today. You need to understand where you stand.

Most startups are surprised to learn they’ve already implemented 30–50% of both ISO 27001 and SOC 2 requirements through basic security hygiene. The right first step is a gap assessment that shows you exactly what’s done, what’s missing, and what the real scope of work looks like.

From there, you can make an informed decision about which path fits your budget, timeline, and business priorities.

Curious where your startup stands on both standards? See your readiness score in 15 minutes →