SOC 2 vs ISO 27001: Which Should You Pursue First?

What should determine which assurance to pursue first?

The right framework to pursue first depends on three factors: where your buyers are located, what industry they operate in, and how quickly you need a report in hand.

Decision Matrix

Why Geography Drives the Decision

Enterprise procurement teams evaluate vendors against the security framework they know and trust. In North America, SOC 2 has become the default standard for cloud service provider security evaluation. Enterprise buyers in the US expect a SOC 2 Type II report -- many include it as a mandatory requirement in RFPs and vendor security questionnaires.

In contrast, European and APAC buyers are far more likely to request ISO 27001 certification, which aligns with international standards bodies and regulatory frameworks like GDPR.

The practical implication is clear: pursuing the framework your buyers recognize removes friction from your sales process faster than pursuing the "better" framework in abstract terms. In our experience advising B2B software companies, we have seen deals stall for weeks simply because a company had the wrong framework for its target buyer's procurement checklist.

How do the options compare for prioritization?

The following comparison highlights the differences that matter most when deciding which to pursue first.

ISO 27001 has a lower three-year total cost of ownership because the three-year certification cycle includes lighter surveillance audits in years two and three rather than full re-audits. Year-one costs are comparable between the two frameworks; the savings emerge in years two and three. However, what we tell clients is that cost alone should not drive the decision — the revenue impact of having the right framework for your target market far outweighs the cost differential.

The SOC 2-First Argument

Faster Time to First Report

Discuss the required report type and evidence with the auditor and intended buyer. Do not assume a fixed completion time or that one framework is always faster. If you need to unblock enterprise deals now, SOC 2 Type I delivers a result while you continue building toward Type II. This is the path we recommend most often for early-stage companies with active sales pipelines.

Stronger Enterprise Sales Enablement in North America

In the US enterprise software market, SOC 2 is the de facto standard. Security review questionnaires reference SOC 2 by name. Procurement teams have internal checklists that include SOC 2. ISO 27001 is recognized in the US market, but it does not carry the same weight in procurement workflows as SOC 2.

More Detailed Report Satisfies Security Teams

SOC 2 reports contain granular detail about specific controls, testing procedures, and test results. Enterprise security teams can evaluate your exact control environment rather than simply verifying that you hold a certificate. This transparency builds deeper trust with technically sophisticated buyers -- something we see consistently when our clients share their reports during enterprise sales cycles.

Flexible Scope Reduces Initial Complexity

SOC 2 allows you to start with the Security criterion only and add Availability, Processing Integrity, Confidentiality, or Privacy in future audit cycles. This means you can achieve your first report with a focused scope and expand as your program matures. We typically recommend starting with Security only for a first Type I, then adding criteria as buyer requirements dictate. ISO 27001 requires a broader ISMS scope from the outset.

The ISO 27001-First Argument

Lower Long-Term Cost

For budget-constrained companies that can tolerate a longer time to first certification, ISO 27001 provides better cost efficiency.

International Market Recognition

ISO 27001 is the globally recognized information security standard. If your buyers are primarily outside North America, ISO 27001 is the framework they expect. European companies in particular are more familiar with ISO standards and may not recognize SOC 2 at all.

Regulatory Alignment

ISO 27001 aligns well with GDPR requirements and other international regulatory frameworks. We advise clients with significant European revenue exposure to weight this factor heavily in their decision.

Three-Year Certification Period

Once certified, your ISO 27001 certificate remains valid for three years (subject to surveillance audits). SOC 2 reports are typically expected to be refreshed annually. The longer certification period provides stability for organizations that want to minimize annual compliance overhead.

How Pursuing One Framework First Reduces the Effort for the Second?

The strongest argument for doing both frameworks -- rather than choosing one permanently -- is the substantial control overlap between SOC 2 and ISO 27001. Organizations that have completed one framework can add the second with significantly less incremental work. This is one of the most important points we make to clients early in the planning process.

Control Overlap

Some controls and evidence may support both SOC 2 and ISO 27001, subject to their distinct scope and objectives. The overlapping areas include:

• Access management: User provisioning, authentication, authorization, access reviews
• Encryption: Data protection at rest and in transit
• Monitoring and logging: Audit trails, anomaly detection, log review
• Risk assessment: Risk identification, analysis, treatment, and ongoing management
• Incident response: Detection, classification, response, recovery, and communication
• Vendor management: Third-party security assessment and ongoing monitoring
• Change management: Change control procedures for infrastructure and applications
• Business continuity: Disaster recovery planning and testing

Incremental Effort After SOC 2

If you pursue SOC 2 first, the incremental work to add ISO 27001 includes:

• Establishing a formal ISMS (Information Security Management System) with documented scope, policy framework, and management review process
• Mapping existing SOC 2 controls to ISO 27001 Annex A controls and addressing gaps
• Conducting an ISO 27001-specific internal audit
• Completing a management review meeting
• Engaging an accredited certification body for the Stage 1 (documentation review) and Stage 2 (certification) audits

Incremental Effort After ISO 27001

If you pursue ISO 27001 first, the incremental work to add SOC 2 includes:

• Mapping ISO 27001 controls to SOC 2 Trust Service Criteria
• Addressing SOC 2-specific requirements not covered by ISO 27001 (system description, management assertion, CPA attestation format)
• Engaging a CPA firm for the SOC 2 audit
• Establishing continuous evidence collection aligned with SOC 2's observation period requirements
• Documenting controls in the format SOC 2 auditors expect

GRC Platform Efficiency

Modern GRC platforms -- Vanta, Drata, Secureframe, Sprinto, and others -- support both frameworks simultaneously. When you implement a control for one framework, the platform automatically maps it to the corresponding requirement in the other framework. This eliminates the duplicate effort of managing two separate compliance programs. We help our clients select and implement the right GRC platform as part of their multi-framework strategy.

Pursuing Both: Recommended Sequencing

For organizations that need both frameworks (the most common scenario for growth-stage and mid-market SaaS companies), here is the sequencing we recommend:

Sequence 1: SOC 2 First (Recommended for US-Based Companies)

This sequence provides the fastest time to first deliverable (Type I at month three), transitions to Type II for long-term credibility, and layers ISO 27001 onto the existing SOC 2 control foundation.

Sequence 2: ISO 27001 First (Recommended for International-First Companies)

This sequence prioritizes international market credibility and then uses the established ISMS as the foundation for SOC 2 compliance.

Industry-Specific Considerations

Certain industries have clearer preferences that simplify the decision. Based on what we see across our client base, here is how industry maps to framework priority:

We help our clients build efficient multi-framework programs that match their specific industry and market position, so the sequencing decision accounts for both current buyer requirements and where the company is heading over the organization’s planning horizon.

New to both frameworks? Grab our free SOC 2 and ISO 27001 startup resources — buyer's guides and readiness checklists written for first-time founders.