ISO 27001 and SOC 2 are two of the most common ways organizations demonstrate that they take information security seriously.

They are also frequently treated as if they are interchangeable.

They are not.

ISO 27001 is an international management system standard for establishing, implementing, maintaining, and continually improving an Information Security Management System (ISMS).

SOC 2 is an independent attestation engagement in which a CPA firm evaluates controls relevant to selected Trust Services Criteria and reports on the results.

Both can provide valuable assurance to customers and other stakeholders, but they approach that assurance differently.

If your organization is deciding between ISO 27001 and SOC 2, the right choice depends less on which one is “better” and more on:

• what your customers require;
• which markets you serve;
• what type of assurance they expect;
• whether you need certification or an attestation report;
• how mature your security program is;
• whether you are building a broader security management system;
• whether you may eventually need both.

For many organizations, the decision starts with a simpler question:

What problem are we trying to solve?

ISO 27001 vs. SOC 2 at a Glance

Area	ISO 27001	SOC 2
What it is	Information security management system standard	Independent controls attestation
Primary focus	Building and operating an ISMS	Evaluating controls against Trust Services Criteria
Outcome	Certification	SOC 2 report
Assessment performed by	Certification body	Independent CPA firm
International use	Strong global recognition	Particularly common in the United States
Risk-based	Yes	Risk and control environment are important to the engagement
Defined security control reference set	Annex A contains 93 reference controls	Uses applicable Trust Services Criteria
Management system requirements	Yes	Not structured as an ISO management system
Type I / Type II distinction	No	Yes
Ongoing assessment	Surveillance and recertification cycle	Organizations commonly undergo recurring examinations
Typical business driver	Customer, market, contractual, governance, or certification requirements	Customer assurance, vendor reviews, procurement, and sales requirements

Both can support customer trust.

But the deliverable and underlying structure are different.

What Is ISO 27001?

ISO/IEC 27001 is an international standard for information security management systems.

It provides requirements for establishing and operating an ISMS.

The management system includes areas such as:

• organizational context;
• leadership;
• planning;
• information security risk assessment;
• risk treatment;
• support and resources;
• operation;
• performance evaluation;
• internal audit;
• management review;
• corrective action;
• continual improvement.

Annex A provides 93 information security reference controls organized into four categories:

• organizational;
• people;
• physical;
• technological.

Organizations do not simply implement all 93 controls automatically.

They determine the controls necessary through risk treatment and other relevant requirements, then compare those controls with Annex A to verify that necessary controls have not been omitted.

When an organization successfully completes the certification process, it can receive an ISO 27001 certificate covering a defined ISMS scope.

For a deeper introduction, see What Is ISO 27001? Requirements, Controls & Certification Explained.

What Is SOC 2?

SOC 2 is an attestation framework used to report on controls at a service organization relevant to the AICPA Trust Services Criteria.

SOC 2 engagements are particularly common among technology companies, SaaS providers, cloud service providers, and other organizations that need to provide customers with assurance about their control environment.

A SOC 2 examination is performed by an independent CPA firm.

Rather than receiving a certification, the organization receives a SOC 2 report containing the service auditor’s opinion and information about the system and controls evaluated.

This distinction is important.

An organization does not become “SOC 2 certified.”

You will frequently see that phrase used informally, but SOC 2 results in an attestation report, not a certification.

What Are the SOC 2 Trust Services Criteria?

SOC 2 engagements use the Trust Services Criteria.

The five categories are:

• Security: Protection against unauthorized access, use, or other inappropriate activity.
• Availability: Whether systems are available for operation and use as committed or agreed.
• Processing Integrity: Whether system processing is complete, valid, accurate, timely, and authorized.
• Confidentiality: Whether information designated as confidential is protected.
• Privacy: Whether personal information is collected, used, retained, disclosed, and disposed of appropriately.

Security is central to a SOC 2 engagement.

The other categories may be included based on the organization’s services, commitments, risks, and assurance objectives.

That means two SOC 2 reports do not necessarily cover exactly the same criteria.

When reviewing a SOC 2 report, understanding its scope matters.

SOC 2 Type I vs. Type II

One of the most important SOC 2 distinctions is between Type I and Type II reports.

SOC 2 Type I

A Type I report evaluates the design of controls at a specified point in time.

It can help demonstrate that controls have been suitably designed as of that date.

SOC 2 Type II

A Type II report evaluates the design and operating effectiveness of controls over a specified period.

That additional operating period makes Type II particularly valuable when customers want evidence that controls did not merely exist on paper at one moment but operated over time.

This is different from ISO 27001.

ISO 27001 does not have “Type I” and “Type II” certifications.

Certification vs. Attestation

This is one of the clearest differences between ISO 27001 and SOC 2.

With ISO 27001, an organization pursues certification of its ISMS.

With SOC 2, an organization undergoes an attestation examination and receives a report.

The practical distinction matters because customers may ask for different evidence.

One procurement team might request:

“Please provide your ISO 27001 certificate.”

Another might request:

“Please provide your current SOC 2 Type II report.”

Those requests are not asking for the same artifact.

Before investing in either framework, determine what your actual customers and prospects expect.

ISO 27001 Scope vs. SOC 2 Scope

Scope matters in both.

An ISO 27001 certificate does not automatically mean every system, office, employee, product, and business unit within the entire organization is covered.

The ISMS has a defined scope.

That scope should be reviewed when determining what the certification actually provides assurance over.

SOC 2 reports also have defined system boundaries and descriptions.

The report should be evaluated in the context of the services, systems, controls, criteria, and period covered.

This leads to an important principle:

Never evaluate either ISO 27001 certification or a SOC 2 report based only on the logo displayed on a vendor’s website.

Understand what was actually assessed.

ISO 27001 Controls vs. SOC 2 Controls

Another common misunderstanding is that ISO 27001 and SOC 2 provide two competing lists of security controls.

The comparison is more nuanced.

ISO 27001 includes the Annex A reference control set, but the organization’s control environment is driven by its risk treatment and requirements.

SOC 2 uses the Trust Services Criteria against which controls within the organization’s system are evaluated.

In both cases, the organization needs actual controls that operate.

Examples may involve:

• access management;
• change management;
• incident response;
• risk management;
• security awareness;
• vulnerability management;
• logical security;
• monitoring;
• supplier management;
• business continuity;
• system operations.

There can therefore be substantial overlap in the underlying activities even though the frameworks organize and evaluate them differently.

ISO 27001 Is Built Around a Management System

One of the defining characteristics of ISO 27001 is the ISMS.

The standard does not only ask whether individual security controls exist.

It establishes a management system around information security.

That includes a cycle of:

Context → risk → treatment → controls → operation → monitoring → audit → management review → improvement

The organization is expected to evaluate and continually improve the system.

That makes ISO 27001 particularly useful when the organization wants a structured governance model for managing information security over time.

Our ISO 27001 Implementation Guide walks through that management system in detail.

SOC 2 Is Built Around Independent Reporting

SOC 2 approaches assurance differently.

The service organization describes its system and controls, and an independent CPA evaluates that environment against the applicable criteria within the engagement.

The resulting report provides customers and other authorized users with detailed information that can support their own vendor risk and assurance processes.

This can be particularly useful when customers want more than a certificate.

A SOC 2 report can provide insight into the system, controls, testing, and results of the examination.

The report itself is therefore a significant part of the value.

Which Is More Common in the United States?

SOC 2 is deeply established in the U.S. technology and service-provider market.

Many SaaS companies encounter SOC 2 requests from enterprise customers relatively early in their compliance journey.

ISO 27001 also has substantial adoption in the United States, particularly among organizations operating internationally, selling into enterprise markets, or responding to customers that specifically expect ISO certification.

The important point is not to choose based on a general popularity contest.

Look at your market.

If ten strategic prospects are asking for SOC 2 Type II and nobody is asking for ISO 27001, that is valuable information.

If your European and global customers repeatedly ask for ISO 27001 certification, that is equally valuable.

Customer evidence should outweigh generic advice.

Which Is Better for International Organizations?

ISO 27001 has a major advantage when international recognition is important.

It is an international standard used across industries and geographic markets.

Organizations with global customers, international operations, or procurement requirements referencing ISO standards may therefore find ISO 27001 particularly valuable.

That does not make SOC 2 irrelevant outside the United States.

Customers in other markets may understand and accept SOC 2 reports.

But if international recognition is a primary requirement, ISO 27001 often has a stronger natural position.

Which Is Better for SaaS Companies?

There is no universal answer.

SaaS companies commonly pursue SOC 2 because enterprise customers frequently request it during procurement and vendor security reviews.

ISO 27001 may be preferable when:

• customers specifically request certification;
• the company sells internationally;
• the organization wants a formal ISMS;
• procurement requirements reference ISO 27001;
• the company expects ISO certification to support future markets.

A SaaS company may also need both.

Instead of asking:

“What compliance framework should SaaS companies use?”

Ask:

“What assurance artifacts are our target customers asking us to provide?”

That is much more actionable.

Do You Need ISO 27001 or SOC 2 to Be Secure?

No.

Neither certification nor attestation automatically makes an organization secure.

An organization can have strong security practices without either.

It can also have a certification or report and still experience a security incident.

Security assurance should never be interpreted as a guarantee that:

• no breach will occur;
• every vulnerability has been eliminated;
• every control works perfectly;
• every organizational system is in scope;
• no security risk remains.

Both ISO 27001 and SOC 2 should be understood in the context of what was evaluated.

ISO 27001 vs. SOC 2 Cost

Cost varies significantly for both.

Factors affecting ISO 27001 cost can include:

• ISMS scope;
• organizational size;
• number of locations;
• current security maturity;
• implementation support;
• certification body fees;
• remediation;
• internal audit;
• employee time;
• technology.

SOC 2 costs can similarly depend on:

• system scope;
• organization size and complexity;
• selected Trust Services Criteria;
• Type I or Type II engagement;
• CPA firm;
• readiness support;
• remediation;
• tooling;
• employee time.

In both cases, the external audit or examination fee is only part of the total cost.

If an organization needs significant security improvements before it is ready, remediation can exceed the cost of the assessment itself.

For ISO 27001 budgeting specifically, see ISO 27001 Certification Cost: What You’ll Actually Pay For.

Which One Takes Longer?

There is no reliable universal timeline.

The duration depends heavily on the organization’s starting point.

An organization that already has:

• defined security responsibilities;
• mature risk management;
• documented controls;
• operating security processes;
• consistent evidence;
• internal oversight;

may move considerably faster than an organization building those capabilities from scratch.

SOC 2 Type II also requires controls to be evaluated over a period rather than only at a single point in time.

For either framework, aggressive project timelines should not substitute for actual control operation.

Documentation can be produced quickly.

Operational history takes time to create.

Can You Use the Same Controls for ISO 27001 and SOC 2?

Often, yes.

You do not need two entirely separate security programs simply because you pursue two assurance frameworks.

Many underlying controls can support both.

For example, the same organizational processes for access management, vulnerability management, incident response, change management, security awareness, and supplier risk may support requirements or criteria across multiple frameworks.

The better approach is usually:

One control environment → multiple framework mappings

rather than:

ISO controls + SOC 2 controls + another separate set for every future framework

A well-designed control library can reduce duplication.

For example:

Organizational Control	ISO 27001	SOC 2
Quarterly user access review	Mapped to relevant ISO requirements and controls	Mapped to relevant Trust Services Criteria
Security awareness training	Mapped	Mapped
Supplier security assessment	Mapped	Mapped
Incident response process	Mapped	Mapped
Vulnerability management	Mapped	Mapped

The exact mappings need to reflect the organization’s control design and the applicable framework requirements.

The point is architectural.

Build controls once. Map them intelligently.

Can ISO 27001 Help With SOC 2?

Yes.

An established ISMS can provide substantial groundwork for SOC 2 because many foundational security and governance processes may already exist.

For example, an ISO 27001 program may already have:

• risk assessment;
• control ownership;
• access management;
• incident management;
• supplier security;
• security awareness;
• change management;
• vulnerability management;
• monitoring;
• internal oversight.

However, ISO 27001 certification does not automatically produce a SOC 2 report.

The organization still needs to define the SOC 2 engagement and undergo the appropriate examination.

Can SOC 2 Help With ISO 27001?

Yes.

An organization with a mature SOC 2 program may already have many controls and evidence practices that can support ISO 27001 implementation.

The major shift is recognizing that ISO 27001 requires a broader management system structure.

The organization may need to formalize or strengthen areas such as:

• ISMS context;
• interested parties;
• ISMS scope;
• information security risk treatment;
• Statement of Applicability;
• information security objectives;
• internal audit;
• management review;
• continual improvement.

Existing SOC 2 controls can provide a strong foundation, but they do not automatically create the ISMS.

Do You Need Both ISO 27001 and SOC 2?

Some organizations do.

This is especially common when customer requirements come from different markets.

For example:

• U.S. enterprise customers may repeatedly request SOC 2 Type II reports.
• International customers may request ISO 27001 certification.
• Strategic prospects may require one or the other before completing procurement.
• Different industries may have different assurance expectations.

If both provide meaningful commercial value, maintaining both may make sense.

But do not pursue both simply because more compliance logos appear more impressive.

Every framework creates implementation, assessment, maintenance, and administrative costs.

There should be a business reason.

How to Decide Between ISO 27001 and SOC 2

Start with the evidence you already have.

Ask:

• What are current customers requesting?
• What are prospects requesting?
• What appears in security questionnaires?
• What does procurement require?
• Are deals being delayed because a particular assurance artifact is missing?
• Are we primarily serving U.S. customers or a global market?
• Do we need a certificate or a detailed attestation report?
• Do we want to establish a formal information security management system?
• Are we likely to need both within the next several years?
• Can we design the control environment now to support both?

Then consider the likely path.

Situation	Likely Direction
Customers explicitly require ISO 27001 certification	ISO 27001
Customers explicitly require SOC 2 Type II	SOC 2
International recognition is a major priority	ISO 27001 may have an advantage
U.S. SaaS customers consistently request SOC 2	SOC 2 may have an advantage
Organization wants a formal security management system	ISO 27001
Different strategic customers require both	Plan for both
Nobody is requesting either	Clarify the business objective before spending the money

The final row is important.

Compliance projects should solve a problem.

If nobody internally or externally can explain why the organization needs a particular assurance framework, determine the business case before starting the project.

Common ISO 27001 vs. SOC 2 Mistakes

• Calling SOC 2 a certification: SOC 2 results in an attestation report from a CPA firm. It is not a certification.
• Assuming ISO 27001 means all 93 Annex A controls are implemented: ISO 27001 uses a risk-based control selection process. All 93 controls are not automatically mandatory.
• Choosing based on which logo looks more impressive: Customer and market requirements should drive the decision.
• Building separate controls for each framework: Many organizational controls can support multiple frameworks. Map common controls rather than duplicating processes unnecessarily.
• Ignoring scope: An ISO certificate or SOC 2 report does not automatically cover everything an organization does.
• Assuming either one guarantees security: Both provide assurance within a defined scope and process. Neither eliminates security risk.
• Pursuing both immediately without a business reason: More frameworks mean more cost and maintenance. Build toward both when the market justifies it.
• Treating compliance as an audit project: Controls need to operate outside the assessment period if they are going to provide meaningful security value.

A Practical Decision Test

If your organization is still debating ISO 27001 vs. SOC 2, take the conversation out of the compliance team.

Ask sales, customer success, procurement, security, and leadership:

• Which one are customers actually requesting?
• How many deals have been affected?
• Which customers matter most strategically?
• Are those customers concentrated in particular markets?
• What evidence are we currently unable to provide?
• What will pursuing the framework enable commercially?
• What existing controls can support the work?
• What gaps would need to be addressed?
• Are we likely to need the other framework soon afterward?

Then make the decision based on the business.

If SOC 2 removes the immediate barrier to your next ten enterprise deals, that matters.

If ISO 27001 certification is necessary to compete in your target international market, that matters.

If you know you will need both, design the underlying security program so you are not rebuilding it twice.

ISO 27001 vs. SOC 2 Frequently Asked Questions

Is ISO 27001 the same as SOC 2?

No. ISO 27001 is an international information security management system standard that can result in certification. SOC 2 is an attestation engagement that results in a report from an independent CPA firm.

Is SOC 2 a certification?

No. Organizations undergo a SOC 2 examination and receive a SOC 2 report. Referring to an organization as “SOC 2 certified” is technically inaccurate.

Which is better, ISO 27001 or SOC 2?

Neither is universally better. The right choice depends on customer requirements, market expectations, business objectives, geographic reach, and the type of assurance the organization needs to provide.

Is ISO 27001 harder than SOC 2?

There is no useful universal answer. Difficulty depends on the organization’s scope, existing controls, maturity, resources, chosen SOC 2 criteria, and other factors.

Is ISO 27001 more expensive than SOC 2?

Not necessarily. Total cost for either can vary significantly based on scope, maturity, assessment fees, consulting, remediation, technology, and internal labor.

Do SaaS companies need SOC 2 or ISO 27001?

It depends on their customers and markets. U.S. SaaS companies frequently encounter SOC 2 requirements, while ISO 27001 may be especially valuable for organizations serving international customers or customers that specifically require certification.

Can an organization have both ISO 27001 and SOC 2?

Yes. Many organizations maintain both when different customers, markets, or business requirements justify the investment.

Does ISO 27001 replace SOC 2?

Not automatically. A customer that specifically requires a SOC 2 report may not accept ISO 27001 certification as a substitute.

Does SOC 2 replace ISO 27001?

Not automatically. A customer or procurement requirement specifically calling for ISO 27001 certification may not be satisfied by a SOC 2 report.

Can the same security controls support both?

Yes. Many underlying organizational controls can support both ISO 27001 and SOC 2 when they are appropriately designed, operated, evidenced, and mapped.

Choose the Business Outcome First

The ISO 27001 vs. SOC 2 decision becomes much easier when you stop asking which framework is better.

Instead, ask what the organization needs to accomplish.

If the objective is to satisfy customers requesting an internationally recognized information security management system certification, ISO 27001 may be the clearer path.

If customers are asking for a SOC 2 Type II report during U.S. enterprise procurement, SOC 2 may be the immediate priority.

If important customers require both, build a common control environment that can support both.

The underlying principle is simple:

Business requirement → assurance objective → framework → controls → evidence

Not:

Popular framework → expensive project → figure out the business reason later

If ISO 27001 is the direction you’ve chosen, start with our ISO 27001 Implementation Guide: A Practical Roadmap for Building Your ISMS.

You can also use the ISO 27001 Checklist: What You Need Before Certification to evaluate your implementation readiness.