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ISO 27001 vs SOC 2 is a choice between an international standard for information security management systems and a framework for independent reporting on an organisation's controls.
Both can support information security objectives. Compare them against your business needs, customer expectations, existing controls and long-term responsibilities.
| Criterion | ISO 27001 | SOC 2 |
|---|---|---|
| Main purpose | Defines requirements for an information security management system. | Provides independent reporting on controls relevant to selected Trust Services Criteria. |
| Assessment | Independent certification audit against the standard's requirements. | Independent auditor examination of controls within the defined scope. |
| Outcome | Can result in certification of the information security management system. | Results in an independent assurance report. |
| Scope | Covers an information security management system within its defined scope. | Covers controls and systems included in the examination scope. |
| Evidence | Uses management system documentation, risk assessments and control evidence. | Uses control documentation and evidence relevant to the examination. |
| Continuity | Requires ongoing management, review and improvement of the security management system. | Requires maintaining relevant controls and supporting evidence for reporting. |
ISO/IEC 27001 defines requirements for establishing, maintaining and improving an information security management system. Organisations can seek independent certification against the standard.
SOC 2 involves an independent auditor's report on controls relevant to selected Trust Services Criteria.
Both involve information security controls, but their structures and forms of assurance differ. The useful question is which approach fits your organisation's objectives.
ISO 27001 can fit organisations seeking an established approach to managing information security risks, responsibilities and improvement activities.
ISO 27001 provides a route to independent certification of an information security management system against defined requirements.
The standard can help bring security policies, risk assessment, operational practices and management responsibilities into a common structure.
ISO 27001 may suit organisations that want information security management to develop alongside changing business systems and risks.
SOC 2 can fit organisations whose customers want an independent report describing relevant controls and the auditor's findings.
SOC 2 may suit service organisations that want to demonstrate how controls relate to the systems and services they provide.
SOC 2 reports address controls within a defined examination scope and against selected Trust Services Criteria.
This can help customers understand the controls examined.
SOC 2 may fit organisations whose customers use independent assurance reports when evaluating service providers and their control environments.
Compare the purpose, assessment structure, organisational scope and continuing work involved in each approach.
Both approaches require an understanding of existing security practices.
ISO 27001 preparation may involve defining the management system, assessing risks and reviewing controls.
SOC 2 preparation may involve identifying applicable criteria, documenting controls and gathering supporting evidence.
Compare the work needed for your organisation.
The assessment process differs between the approaches.
ISO 27001 certification involves an independent audit against the standard's requirements.
SOC 2 involves an examination by an independent auditor and the issue of an assurance report.
ISO 27001 focuses on an information security management system.
SOC 2 focuses on controls relevant to the selected Trust Services Criteria.
Define the organisational and technical scope for each approach.
Both approaches involve continuing security responsibilities.
ISO 27001 requires ongoing management, review and improvement of the security management system.
SOC 2 preparation and reporting involve maintaining relevant controls and supporting evidence.
These examples show how different security objectives can influence the decision. They are illustrations, not customer case studies.
An employer wants to organise information security responsibilities and develop a consistent approach to managing risks.
The job needs:
ISO 27001 could fit these objectives.
Explore ISO 27001 expertiseAn employer provides technology services and receives requests from customers for independent assurance about security controls.
The work may focus on:
SOC 2 could fit if the reporting approach meets the customers' needs.
An employer wants a structured approach to security management while also addressing customer requests for control assurance.
The employer could combine:
Both approaches can support different objectives within the same security programme.
Use your security objectives to compare the approaches.
These questions help you compare the approaches against the same organisational requirements. Different business needs can lead to different choices.
| Question | ISO 27001 | SOC 2 |
|---|---|---|
| Security objective | Supports structured information security management. | Supports independent assurance about relevant organisational controls. |
| Independent assessment | Uses an audit against information security management system requirements. | Uses an independent auditor's examination of selected controls. |
| Assurance output | Can provide recognised information security management system certification. | Provides an assurance report covering the examination scope. |
| Control coverage | Addresses information security controls within the management system. | Addresses controls relevant to selected Trust Services Criteria. |
| Documentation | Includes security policies, risk management records and management system evidence. | Includes control descriptions and supporting examination evidence. |
| Ongoing responsibilities | Maintain and improve the information security management system. | Maintain relevant controls and evidence for subsequent examinations. |
| Combined approach | Can provide a security management structure alongside SOC 2 reporting. | Can provide control assurance alongside ISO 27001 security management. |
Compare their purpose, assessment approach, scope, security controls, evidence requirements and continuing responsibilities.
This comparison explains the differences. It is not a ranking.
The suitable approach depends on your security objectives and the assurance your customers need.
An organisation can use ISO 27001 and SOC 2 to address different information security objectives.
ISO 27001 can provide the structure for managing information security risks, policies and responsibilities.
SOC 2 can provide independent reporting on controls relevant to selected Trust Services Criteria.
Some documentation and control evidence may support preparation for both approaches, depending on their scope.
The important point is to understand what each assessment covers, which evidence is relevant and how the organisation will maintain its security practices.
A useful comparison begins with your information security needs, customer expectations and existing controls.
Start with your information security needs, customer expectations, existing controls and organisational responsibilities.
Consider what each approach involves for:
ISO 27001 certification and SOC 2 reporting involve different assessment structures and ongoing activities.
Compare how your organisation would maintain relevant controls, documentation and management responsibilities after the initial work.
Ask the talents you are considering to explain how they would assess your current security practices and identify the relevant preparation activities.
Compare their proposed approaches against the same security objectives.
An initial security assessment can help clarify the starting position.
Use the same security objectives when discussing ISO 27001 and SOC 2 with independent cybersecurity professionals.
Use your business objectives, customer requests, current controls and internal responsibilities as the basis for comparing the approaches.
Ask how each approach addresses management requirements, control evidence, assessment scope and ongoing security activities.
A cybersecurity assessment or discussion with an experienced specialist may help clarify which approach suits your organisation.
The employer decides which route to pursue, chooses the talent and manages the collaboration.
Both ISO 27001 and SOC 2 can support an organisation's approach to information security.
If you need a structured information security management system, explore ISO 27001.
If customers need independent reporting on relevant controls, explore SOC 2.
Your business requirements, customer expectations and existing security practices can guide the decision.