Why Smart SaaS Companies Get ISO 27001 and SOC 2 Together (And How You Can Too)

Last updated: March 2026

Here's something nobody tells you when you're trying to close that first enterprise deal: you'll need both ISO 27001 AND SOC 2. Not one or the other. Both.

I learned this the hard way watching a fintech founder lose a $500K deal because they had ISO but not SOC 2. The US buyer wanted SOC 2. Three months later, same company lost another deal to a European client who needed ISO 27001.

That's when it clicked: why are we doing these separately?

The Thing About Enterprise Sales Nobody Mentions

Your first enterprise customer will ask for security certifications. If they're in Europe or the UK, they want ISO 27001. If they're in the US, they want SOC 2. If you're selling to both markets (and you should be), you need both.

The traditional advice? "Get ISO first, then do SOC 2 next year."

That's expensive advice. And slow.

Here's what actually works: do them together. Same controls, same timeline, way less money.

What These Certifications Actually Are (Without the Jargon)

ISO 27001 is an international standard that says "we have a proper information security management system." It's big in Europe, UK, and increasingly in India. Think of it as your security passport for global business.

SOC 2 is an American framework that proves you're protecting customer data according to five trust principles. US companies love it because it's detailed and auditor-verified.

Different names, different origins, but here's the secret: they're asking for the same things.

The 70% Overlap Nobody Talks About

When I first mapped ISO 27001 controls to SOC 2 criteria, I expected maybe 40% overlap.

It's actually 70%.

Let me show you:

Access Control:

• ISO 27001 Annex A.9: "Access to information and systems must be controlled"
• SOC 2 CC6: "The entity implements logical access security controls"

Same thing. Different words.

Encryption:

• ISO 27001 Annex A.10: "Cryptographic controls"
• SOC 2 CC6.7: "The entity restricts the transmission of data"

Again, same requirement.

Incident Response:

• ISO 27001 Annex A.16: "Information security incident management"
• SOC 2 CC7: "The entity identifies, analyzes, and responds to security events"

You get the pattern.

This means if you implement proper access controls once, you satisfy both frameworks. Same with encryption, monitoring, incident response, change management, and vendor risk.

The Math That Changes Everything

Traditional Approach (Sequential):

• ISO 27001 first: 8-10 months, ₹6-8 lakhs
• SOC 2 next: 8-10 months, ₹6-8 lakhs
• Total: 16-20 months, ₹12-16 lakhs

Integrated Approach (Parallel):

• Both together: 6-8 months, ₹6-8 lakhs
• Savings: 10-12 months, ₹6-8 lakhs

Why? Because you're not duplicating work. One gap assessment. One implementation. One set of policies. Two audits (you need separate auditors), but they're reviewing the same controls.

How This Actually Works (The 6-Month Plan)

Month 1: Foundation

Start with a combined gap assessment. Your consultant maps your current state against both ISO 27001 Annex A and SOC 2 Trust Services Criteria simultaneously.

You'll create one ISMS (Information Security Management System) that satisfies both. One risk assessment methodology. One asset inventory. One set of security policies.

The trick? Write policies that reference both standards. For example: "This access control policy satisfies ISO 27001 A.9 and SOC 2 CC6 requirements."

Months 2-4: Implementation

This is where the magic happens. You implement controls once, but document them for both frameworks.

Example: Setting up MFA (multi-factor authentication)

• Technical implementation: Same for both
• ISO documentation: "Control A.9.4.2 implemented via Okta MFA"
• SOC 2 documentation: "CC6.1 satisfied through mandatory MFA for all users"

Same control, two checkboxes.

You'll need some framework-specific items:

• ISO 27001: Statement of Applicability, ISMS Manual
• SOC 2: System Description, Trust Services Criteria mapping

But the heavy lifting (actual security controls) is shared.

Month 5: Evidence Collection

Both frameworks need proof your controls work. ISO wants 3 months of evidence. SOC 2 Type 1 is point-in-time (no waiting), but Type 2 needs 3-6 months.

Smart move: Go for SOC 2 Type 1 initially if you're in a hurry. You can upgrade to Type 2 later. For ISO, you need the 3-month evidence period regardless.

Run both evidence collections in parallel. Your access logs prove both ISO A.9 and SOC 2 CC6 compliance. Your incident response records satisfy both ISO A.16 and SOC 2 CC7.

Month 6: Audits

Here's where you need two separate auditors (ISO certification bodies and SOC 2 auditors are different animals). But they're auditing the same controls.

Schedule them back-to-back if possible. The ISO auditor validates your ISMS in week 1-2. The SOC 2 auditor reviews your trust services in week 3-4.

Both audits feel familiar because you've built one coherent system, not two separate compliance programs.

What This Costs (Real Numbers)

I'm going to break the industry's unwritten rule and tell you actual costs:

Consulting: ₹3-4 lakhs

• Combined gap assessment: ₹50K-75K
• Implementation support: ₹2-3 lakhs
• Audit preparation: ₹50K-75K

ISO 27001 Certification: ₹1.5-2 lakhs

• Stage 1 audit: ₹50K-75K
• Stage 2 audit: ₹1-1.25 lakhs

SOC 2 Audit: ₹1.5-2 lakhs

• Type 1 audit: ₹1.5-2 lakhs
• (Type 2 adds ₹1-1.5 lakhs if you want it)

Total: ₹6-8 lakhs

Compare this to doing them separately (₹12-16 lakhs) and you see why this makes sense.

The Mistakes That Cost Money

Mistake #1: Different consultants for each

Some companies hire an ISO consultant, then later hire a SOC 2 consultant. Now you have two people who don't talk to each other, building two separate compliance programs. Expensive and messy.

Mistake #2: Waiting for ISO before starting SOC 2

The "let's get ISO first" approach means you're implementing controls twice. Once for ISO, then again for SOC 2. Why?

Mistake #3: Not leveraging the overlap

If your consultant isn't showing you the control mapping, they're either inexperienced or padding hours. The overlap is real and substantial.

What You Actually Need to Pull This Off

Internal Resources:

• A project owner (usually CISO, CTO, or senior engineer): 25-30% time for 6 months
• IT/Security team support: 10-15% time for implementation
• Department heads: 5-10% time for policy reviews

External Help:

• One consultant who knows both frameworks (critical)
• One ISO certification body
• One SOC 2 audit firm

Technology:

• You probably have most of it: SSO, logging, monitoring, backup
• Might need: GRC tool (₹50K-1L/year), vulnerability scanner (₹30K-50K/year)

Timeline:

• Realistic: 6-8 months
• Aggressive: 4-5 months (if you're already security-mature)
• Conservative: 8-10 months (if starting from scratch)

When This Doesn't Make Sense

Be honest with yourself:

Don't do dual certification if:

• You have zero enterprise customers and no plans to get them
• Your entire market is domestic India (just do ISO 27001)
• You're pre-revenue (focus on building product first)
• You can't dedicate internal resources for 6 months

Do dual certification if:

• You're selling to US and European enterprises
• You're losing deals due to missing certifications
• You're raising Series A+ (investors love this)
• You're in fintech, healthtech, or SaaS

The Part Where I'm Supposed to Pitch You

Look, I could end this with "Contact us for a free consultation!" but you're smart enough to know when you need help.

Here's what I'll actually say: if you're thinking about this, start by mapping your current controls to both frameworks. Spend a weekend with the ISO 27001 Annex A and SOC 2 TSC documents. See the overlap yourself.

If it makes sense, talk to someone who's done both (not separately, together). Ask them to show you their control mapping. If they can't produce one in 5 minutes, they haven't actually done this before.

And if you want to talk to us about it, sure. We've done this 30+ times. We know where the shortcuts are and where you can't cut corners.

But more importantly: don't let the perfect be the enemy of the good. You don't need perfect compliance. You need good enough to close deals and protect customer data.

Start there.

Questions? Disagree with something? Email us at hello@tcsa.in - we actually read these.