ISO 27001 vs. SOC 2: Understanding the Differences

TL;DR:

• SOC 2 is a US-focused attestation report evaluating service organization controls based on Trust Services Criteria.
• ISO 27001 is an international certification requiring a comprehensive Information Security Management System (ISMS).
• Both frameworks share 40-85% control overlap, enabling organizations to pursue them simultaneously with reduced effort.
• Dual compliance provides competitive advantages by meeting both US and global customer requirements and demonstrating comprehensive security maturity.
• The choice depends on your market (US vs. international), customer requirements, and compliance goals.
• Drata automates evidence collection, control mapping, and continuous monitoring across both frameworks, reducing manual work by up to 70%.

What is SOC 2?

SOC 2 (System and Organization Controls 2) is an attestation report that evaluates how a service organization manages customer data. It is based on five key principles known as the Trust Services Criteria (TSC), developed by the American Institute of Certified Public Accountants (AICPA).

The five Trust Services Criteria are:

• Security
• Availability
• Processing Integrity
• Confidentiality
• Privacy

SOC 2 is critical for technology service providers, cloud platforms, and data processors serving customers in North America. It is frequently required in vendor security questionnaires before a contract can be signed.

While not legally required, a SOC 2 report has become a key factor in building trust and winning new customers. It independently verifies that an organization has effective internal controls in place to safeguard data.

What is ISO 27001?

ISO 27001 is an internationally recognized standard for establishing, maintaining, and continuously improving an Information Security Management System (ISMS). Developed by the International Organization for Standardization (ISO), it provides a risk-based approach to managing information security.

The framework helps organizations systematically assess and reduce threats to the confidentiality, integrity, and availability of data.

Key Concept: An ISMS is a documented system that manages sensitive company information so that it remains secure. It includes people, processes, and IT systems by applying a risk management process.

Unlike SOC 2, ISO 27001 requires companies to proactively identify risks and implement a continuous improvement process. It's especially valuable for international companies and enterprises handling large-scale data, like fintech and healthcare organizations.

SOC 2 and ISO 27001: Similarities

While different in scope, the SOC 2 report and ISO 27001 certification share several core objectives. Both frameworks:

• Provide independent assurance about an organization's security controls.
• Help organizations meet regulatory and industry requirements like GDPR and HIPAA.
• Allow a service company to gain a significant competitive advantage.
• Require ongoing compliance and continuous improvement.
• Share significant control overlap—typically 40-85% of requirements align across both frameworks.
• Require third-party auditors to validate compliance.

SOC 2 and ISO 27001: Key Differences

Despite their similarities, SOC 2 and ISO 27001 have distinct differences in their approach, scope, and output.

Certification vs. Attestation

One of the most important distinctions is their output. ISO 27001 results in a formal certification, while SOC 2 produces an attestation report, which is an auditor's opinion on your controls.

ISO 27001 certificates are valid for three years and can be publicly displayed on your website. SOC 2 reports are confidential documents typically shared only with customers and stakeholders under an NDA.

Scope and Coverage

SOC 2 audits focus on controls relevant to defined services, allowing you to tailor the audit scope. You must include the Security criterion but can optionally add Availability, Confidentiality, Privacy, and Processing Integrity.

ISO 27001 requires a comprehensive evaluation of your entire Information Security Management System (ISMS). The certification examines how all 93 Annex A controls support your risk management framework across the organization.

Timeline and Validity Period

A SOC 2 Type 2 audit evaluates operating effectiveness over a 3-12 month period. Most organizations pursue annual renewals to provide current reports to customers.

ISO 27001 certification has a three-year cycle. It requires annual surveillance audits in years one and two, with a full recertification audit in year three.

Cost Considerations

SOC 2 audit costs are influenced by the audit scope, number of Trust Services Criteria, and system complexity. ISO 27001 certification costs include ISMS implementation, gap assessments, and audit fees.

Key Insight: Organizations pursuing both simultaneously can often reduce total audit costs by 30-40%. This is achieved through shared evidence collection and coordinated audit timelines.

Which Framework is Right for You?

The decision between SOC 2, ISO 27001, or both depends on your target market, customer requirements, and business strategy. Here’s how to evaluate your needs.

Assess Your Market and Clientele

Identify your customers' locations and what security standards they require. If your primary market is the United States, SOC 2 may be more relevant.

For global operations or international clients, ISO 27001 is often more suitable due to its international recognition. To evaluate these factors, you can:

• Review your top clients' RFPs for requested certifications.
• Check competitor benchmarks to understand market expectations.
• Assess future sales channels and the standards they require.

Consider Your Business Needs

SOC 2 offers more flexibility and can be customized to your specific business practices. ISO 27001 is more prescriptive, making it suitable for companies seeking a structured approach.

Decide whether you need a flexible approach (SOC 2) or a prescriptive framework (ISO 27001). A mismatched framework could result in wasted resources or delayed deals.

Check Regulatory and Compliance Requirements

Identify the laws and industry regulations that govern your business. For example, industries like healthcare or finance may have stringent requirements that favor one standard over the other.

To use regulations to help you decide, you can:

• Analyze overlapping standards like HIPAA, GDPR, or PCI DSS.
• Survey auditor preferences, as some specialize in certain verticals.
• Monitor upcoming regulations that may impact your industry.

Why Pursue Both SOC 2 and ISO 27001?

Many organizations find that pursuing both SOC 2 and ISO 27001 delivers strategic advantages that outweigh the effort of dual compliance. A combined approach allows you to meet diverse customer requirements and build a more resilient security program.

Meet Diverse Customer Requirements

Your customers' compliance expectations often depend on their geographic location and industry. US-based customers frequently require SOC 2, while international clients often expect ISO 27001 certification.

Dual compliance ensures you can serve both markets, which is especially valuable for:

• SaaS companies expanding from US to international markets.
• Technology providers serving enterprise clients across multiple regions.
• Organizations in regulated industries with both domestic and global customers.

Reduce Duplication with Control Overlap

SOC 2 and ISO 27001 are not entirely separate efforts, as they share an estimated 40-85% control overlap. This alignment means implementing controls for one framework can simultaneously address requirements for the other.

Common Overlap Areas: Risk management, access control, incident response, and change management all have similar requirements in both frameworks. This significantly reduces duplicate work.

Accelerate Sales Cycles

Having both certifications ready eliminates security review delays during the sales process. You can immediately provide the documentation prospects require, which can shorten deal cycles by weeks.

Dual compliance also signals a level of security maturity that differentiates you from competitors who may only hold one certification.

Build a Stronger Security Program

Pursuing both frameworks creates a more comprehensive security posture than either one alone. ISO 27001's ISMS provides the strategic framework, while SOC 2's testing validates operational effectiveness.

Common Control Overlaps Between SOC 2 and ISO 27001

Understanding where SOC 2 and ISO 27001 controls align is key to an efficient dual compliance program. Here are the primary areas of overlap.

Access Control and Authentication

Both frameworks require strong controls over who can access systems and data. This includes policies for role-based access, multi-factor authentication, and regular access reviews.

Mapping Example: SOC 2's CC6 (Logical and Physical Access Controls) maps to ISO 27001's A.5 and A.8 controls.

Implementation Tip: Implement a single access control policy and review process that satisfies both frameworks. Use an identity and access management (IAM) tool to log all access changes for evidence.

Risk Assessment and Management

Both frameworks mandate a formal process for identifying, analyzing, and treating security risks. This includes maintaining a risk register and a documented risk treatment plan.

Mapping Example: SOC 2's CC3.2 (Risk Assessment) aligns with ISO 27001's Clause 6.1 (Risk assessment and treatment).

Implementation Tip: Conduct a unified risk assessment in a single risk register. This allows you to address threats to information assets (ISO focus) and risks to service criteria (SOC 2 focus) at once.

Incident Response and Management

Both require a documented incident response plan with defined roles and procedures. This includes capabilities for incident detection, logging, response, and post-incident reviews.

Mapping Example: SOC 2's CC7 (Security Incident Management) maps to ISO 27001's A.5.24-A.5.27 controls.

Implementation Tip: Create a single incident response plan. Ensure it covers both SOC 2's focus on service delivery impacts and ISO 27001's emphasis on information security events.

How to Achieve SOC 2 and ISO 27001 Simultaneously

Organizations can significantly reduce time and cost by pursuing SOC 2 and ISO 27001 together. Here is a proven four-step approach.

Step 1: Conduct a Unified Gap Assessment

Start by evaluating your current security posture against both frameworks at the same time. This helps identify existing controls, gaps, and areas of overlap.

Drata Advantage: Drata’s platform automatically maps your controls to both SOC 2 and ISO 27001 requirements. This gives you a real-time view of your compliance status across both frameworks.

Step 2: Create an Integrated Control Framework

Build a master control framework that addresses both standards. For overlapping requirements, draft single policies and implement technical controls once.

Drata Advantage: Drata includes pre-built policy templates that satisfy both SOC 2 and ISO 27001 requirements. This eliminates the need to create and manage separate documentation.

Step 3: Implement Centralized Evidence Collection

Set up a unified repository where evidence serves both frameworks. For example, access review reports can fulfill both SOC 2 and ISO 27001 requirements.

Drata Advantage: Drata automatically collects evidence from 90+ integrations and maps it to the relevant controls in both frameworks. This can reduce manual evidence gathering by up to 70%.

Step 4: Coordinate Audit Timelines

Align your SOC 2 and ISO 27001 audit schedules to maximize efficiency. Use the same evidence package for both audits where controls overlap.

Key Insight: Many organizations complete both certifications within 6-9 months when pursued simultaneously. This is much faster than the 12-18 months it can take when pursuing them sequentially.

How Drata Streamlines SOC 2 and ISO 27001 Compliance

Pursuing dual compliance often means duplicate work and disconnected processes. The Drata Agentic Trust Management Platform provides a unified, automated approach to managing both SOC 2 and ISO 27001 in a single place.

Automated Evidence Collection

Drata connects to your cloud stack to automatically collect evidence for both frameworks. A single piece of evidence can be mapped to all relevant SOC 2 and ISO 27001 controls, so you don’t have to duplicate artifacts across frameworks.

Unified Control Mapping

The platform includes pre-built cross-framework mappings between SOC 2 and ISO 27001 requirements. This reduces the complexity of managing separate control matrices and helps ensure key requirements are consistently covered. 

Coordinated Audit Management

Drata’s Audit Hub centralizes collaboration with your auditors for both frameworks. Auditors can securely access evidence directly in the platform, request additional items, and keep communication in one workspace instead of scattered email threads.

Continuous Monitoring and Readiness

Drata continuously monitors mapped controls and alerts you when tests fail or controls drift out of compliance. That continuous visibility helps you stay audit-ready across SOC 2 and ISO 27001, rather than scrambling to prepare evidence once a year.

Why Early Compliance Matters

Prioritizing compliance early helps build a solid foundation for future audits. Integrating SOC 2 or ISO 27001 requirements from the start establishes a culture of security that scales as your business grows.

Key benefits of early compliance include:

• Accelerate Deals: Show a proactive commitment to security to navigate due diligence faster with clients and investors.
• Avoid Technical Debt: Address security risks upfront to ensure smoother operations and fewer surprises during audits.
• Strengthen Risk Management: Gain real-time visibility into vulnerabilities and remediate issues before they escalate.
• Boost Your Security Posture: Demonstrate credible cybersecurity practices to foster trust and gain a competitive edge.

Frequently Asked Questions

What's the difference between SOC 2 and ISO 27001?

SOC 2 is a US-focused attestation report on security controls for specific services, while ISO 27001 is an international certification for an organization's overall Information Security Management System (ISMS).

Can I get my ISO 27001 and SOC 2 at the same time?

Yes, you can pursue both simultaneously to save time and effort, as they share significant control overlap, though they do require separate audits.

What is the overlap between ISO 27001 and SOC 2?

SOC 2 and ISO 27001 share 40-85% of their controls, primarily in areas like risk management, access control, and incident response.

Is SOC 2 mandatory?

No, SOC 2 is not a legal requirement, but it has become a de facto standard for B2B tech companies in North America to win enterprise deals.

Is ISO 27001 a legal requirement?

No, ISO 27001 is not legally required, but it is an internationally recognized standard that helps meet global customer expectations and certain regulatory obligations.

How much does SOC 2 vs. ISO 27001 cost?

SOC 2 audits typically cost $20k-$100k and ISO 27001 certification costs $30k-$150k+, but pursuing both together can reduce total costs by 30-40%.

How long does it take to achieve SOC 2 and ISO 27001?

A SOC 2 Type 2 audit takes 6-12 months, while initial ISO 27001 certification takes 4-6 months, followed by a three-year certification cycle with annual audits.

Can the same evidence be used for both SOC 2 and ISO 27001 audits?

Yes, the same evidence, such as access reviews or risk assessments, can be used for both audits where controls overlap, which is a key benefit of a unified approach.

Which should I pursue first: SOC 2 or ISO 27001?

Start with the framework your customers demand most; typically SOC 2 for US-based markets and ISO 27001 for international or global operations.