ISAE 3402 vs SOC 2: what is the difference?

Are you comparing ISAE 3402 vs SOC 2 and unsure which assurance report fits your organization? Many service providers face the same question. Both reports help demonstrate control, reliability, and trust. Still, they are not the same. ISAE 3402 focuses on internal controls relevant to clients’ financial reporting, while SOC 2 focuses on information security, availability, confidentiality, processing integrity, and privacy. Would you like to determine which report fits your organization best? Contact Brand Compliance for tailored advice.

This page explains the difference between ISAE 3402 and SOC 2, when each report is relevant, and when a combined audit approach may make sense.

ISAE 3402 vs SOC 2 at a glance

ISAE 3402 is mainly used to provide assurance over controls that affect clients’ financial reporting.
SOC 2 is mainly used to provide assurance over information security and related system controls.

That makes the right choice highly dependent on your services, your clients, and the type of assurance they expect from your organization.

Comparison table

In other words, ISAE 3402 is generally more financially oriented, while SOC 2 is more focused on information security and IT control.

What is ISAE 3402?

ISAE 3402 is an international assurance standard designed for service organizations whose services may affect the financial reporting of their clients. An ISAE 3402 report helps demonstrate that relevant internal controls are properly designed and, depending on the report type, operating effectively over time.

This type of report is often relevant for organizations such as:

• payroll providers
• financial service providers
• administrative outsourcing partners
• trust offices and investment-related service organizations

ISAE 3402 report types

• ISAE 3402 Type I
  This report assesses the design and implementation of controls at a specific point in time.
• ISAE 3402 Type II
  This report assesses both the design and the operating effectiveness of controls over a defined review period.

For organizations that support clients’ financial processes, an ISAE 3402 report is often a key way to demonstrate controlled and reliable service delivery.

What is SOC 2?

SOC 2 is an assurance reporting framework developed by the American Institute of Certified Public Accountants, or AICPA. A SOC 2 report is used to assess how an organization manages information security and related controls.

SOC 2 is particularly relevant for organizations such as:

• cloud service providers
• Software as a Service companies
• data centers and hosting providers
• organizations that process sensitive customer data

Trust Services Criteria

A SOC 2 report is based on the Trust Services Criteria, which cover five control areas:

1. Security
   Protection against unauthorized access to systems and data.
2. Availability
   Assurance that systems are available for operation and use as agreed.
3. Processing integrity
   Assurance that system processing is complete, valid, accurate, timely, and authorized.
4. Confidentiality
   Protection of confidential information within systems and processes.
5. Privacy
   Management of personal data in line with relevant privacy requirements.

SOC report types

In addition to the SOC 2 report, there are two other types of reports. Below we explain the three variants:

SOC 1 – Financial processes and internal controls
Assessment of internal controls relevant to clients’ financial reporting. Consider organizations that provide services such as payroll processing, claims handling, or financial transactions.

• SOC 1 Type I: Focuses on the design and operation of controls at a specific point in time.
  SOC 1 Type II: Examines both the design and operating effectiveness of these controls over a longer period (usually between 3 and 12 months).

SOC 2 – Confidentiality and Information Security
Evaluation of controls based on the Trust Services Criteria: security, availability, processing integrity, confidentiality, and privacy. Intended for companies that want to demonstrate their information security and best practices to customers or partners. SOC 2 reports typically contain sensitive and detailed information and are shared with customers or prospects only under non-disclosure agreements (NDAs).

• SOC 2 Type I
  An evaluation of the design of controls at a specific point in time.
• SOC 2 Type II
  An evaluation of both the design and operating effectiveness of controls over a longer period.

SOC 3 – Public version of SOC 2
Provides a concise overview of security controls, based on the Trust Services Criteria. This is suitable for organizations that want to publicly demonstrate their compliance with security standards, for example, through their website or as a marketing tool.

SOC 3 reports are less detailed than SOC 2 and do not contain confidential information. This makes them suitable for broad, public distribution.

What is the difference between ISAE 3402 and SOC 2?

The difference between ISAE 3402 and SOC 2 lies mainly in the purpose of the report and the type of risk it addresses.

ISAE 3402 is intended for organizations whose services influence the financial reporting of their clients. SOC 2 is intended for organizations that need to demonstrate control over information security, privacy, and system reliability.

That distinction matters. If your clients need assurance that outsourced financial processes are properly controlled, ISAE 3402 is often the better fit. If your clients want assurance about cybersecurity, confidentiality, and operational resilience, SOC 2 is usually more appropriate.

In simple terms

• ISAE 3402 is centered on financial control assurance.
• SOC 2 is centered on information security assurance.

Is ISAE 3402 the same as SOC 2?

No, ISAE 3402 is not the same as SOC 2.

The two reports may appear similar because both are assurance reports for service organizations. However, they use different frameworks and serve different assurance objectives. ISAE 3402 focuses on controls relevant to financial reporting. SOC 2 focuses on controls related to security, availability, confidentiality, processing integrity, and privacy.

That is why organizations should not choose between them based only on market familiarity or client buzzwords. The right choice depends on your services, your client requirements, and the type of assurance your stakeholders expect.

When do you choose ISAE 3402?

ISAE 3402 is typically the most logical option when your organization performs services that affect your clients’ accounting or financial reporting processes.

This often applies when you:

• process payroll
• handle financial administration
• support transaction flows
• operate outsourced financial back-office functions

If your clients’ auditors or finance teams ask for evidence of control over these activities, an ISAE 3402 report is often the expected assurance instrument.

When do you choose SOC 2?

SOC 2 is often the right choice when your organization needs to show that information security and system controls are properly designed and managed.

This is especially relevant if your organization:

• delivers SaaS or cloud services
• hosts systems or infrastructure
• processes customer or business-sensitive data
• works with international clients that expect recognized security assurance

In those situations, a SOC 2 report can strengthen trust, support vendor assessments, and improve commercial credibility.

Can you combine ISAE 3402 and SOC 2?

Yes, in some cases an organization may benefit from both an ISAE 3402 report and a SOC 2 report.

This is especially relevant for service providers that manage both financially relevant processes and technology-driven environments. For example, an organization may process financial data in a cloud platform or support both business administration and IT operations for clients.

In those situations, a combined or aligned audit approach may be more efficient than running two completely separate assurance tracks. That said, the scope and control criteria must be carefully defined to ensure that each report still addresses the right assurance objective.

Which report fits your organization?

The answer depends on the nature of your services and on what your clients need from you.

If your organization affects clients’ financial reporting, ISAE 3402 is often the strongest fit.

If your organization needs to demonstrate control over information security and data handling, SOC 2 is often more appropriate.

If both apply, a combined assessment may be worth exploring.

Need help choosing between ISAE 3402 and SOC 2? Would you like to know whether ISAE 3402, SOC 2, or a combined assurance approach fits your organization best? Brand Compliance helps organizations assess their scope, risks, and stakeholder requirements so they can choose the right audit trajectory. Δ Instagram This field is for validation purposes and should be left unchanged. What is your question about? Your name Email address CAPTCHA