ISO 27001 is the global standard for information security. Learn how it applies to SaaS environments and what controls your SaaS stack needs to comply.
ISO 27001 is the international standard for information security management systems (ISMS). It provides a systematic framework for managing sensitive information so that it remains secure. For European companies in particular — where ISO 27001 certification is often a prerequisite for doing business — it's the foundation of information security governance.
But ISO 27001 was designed before SaaS became the dominant software model. The standard's controls assume a level of infrastructure ownership and visibility that SaaS-first organizations don't have. When 70-80% of your information assets are cloud applications managed by external vendors, implementing ISO 27001 requires a fundamentally different approach.
This guide explains how ISO 27001 applies to SaaS environments and what your organization needs to do to maintain compliance across a portfolio of cloud applications.
ISO 27001 has two main components:
The management system (Clauses 4-10): Requirements for establishing, implementing, maintaining, and continually improving an ISMS. These are process requirements — risk assessment, management commitment, internal auditing, continual improvement.
Annex A controls (93 controls in 4 categories): The security controls you implement to address identified risks. In the 2022 revision, these are organized into:
For SaaS-first organizations, the organizational and technological controls are where most SaaS-specific work happens.
"An inventory of information and other associated assets, including owners, shall be identified and maintained."
SaaS implication: You must inventory every SaaS application in your environment, not just IT-managed ones. This includes shadow IT — applications adopted without IT knowledge.
How to comply:
"Rules for the acceptable use of information and other associated assets shall be identified, documented, and implemented."
SaaS implication: You need an acceptable use policy that specifically addresses SaaS applications, including rules about which applications are approved, what data can be stored in them, and how employees should handle cloud-based information assets.
"Processes and procedures shall be defined and implemented to manage the information security risks associated with the use of supplier's products or services."
SaaS implication: Every SaaS vendor is a supplier. These controls require:
For auditors, this is one of the most scrutinized areas. You need to demonstrate that you assess and monitor the security posture of your SaaS vendors — including those you don't directly manage.
"Access rights to information and other associated assets shall be provisioned, reviewed, and removed in accordance with the organization's topic-specific policy."
SaaS implication: You must manage access across all SaaS applications:
"Information stored on, processed by, or accessible via user endpoint devices shall be protected."
SaaS implication: Since SaaS applications are accessible from any device, this control extends to BYOD scenarios:
"Configurations, including security configurations, of hardware, software, services, and networks shall be established, documented, implemented, monitored, and reviewed."
SaaS implication: This is the SSPM requirement. You must:
"Information stored in information systems, devices, or in any other storage media shall be deleted when no longer required."
SaaS implication: You need a data retention policy that covers all SaaS applications and the ability to enforce deletion across vendor systems.
"Networks, systems, and applications shall be monitored for anomalous behaviour and appropriate actions taken to evaluate potential information security incidents."
SaaS implication: You must monitor SaaS applications for security anomalies:
Many organizations need both ISO 27001 and SOC 2. Here's how they relate:
| Aspect | ISO 27001 | SOC 2 |
|---|---|---|
| Origin | International (ISO) | US (AICPA) |
| Type | Certification | Audit report |
| Scope | Entire ISMS | Specific system/service |
| Controls | 93 Annex A controls | 5 Trust Service Criteria |
| Common in | Europe, Asia, global | North America, SaaS vendors |
| Duration | 3-year certification cycle | Annual audit |
For SaaS environments, the practical requirements overlap significantly. If you implement ISO 27001 controls for your SaaS stack, you're well-positioned for SOC 2 compliance (and vice versa).
ISO 27001 auditors increasingly focus on SaaS-specific evidence:
ISO 27001 remains the gold standard for information security management. In a SaaS-first environment, compliance requires extending traditional ISMS practices to cover cloud applications — including the ones you don't directly manage.
The core challenge is visibility. ISO 27001 requires an asset inventory, supplier assessments, access management, and configuration monitoring across your entire information landscape. When that landscape includes 200+ SaaS applications, manual approaches don't scale.
Invest in automated discovery and SaaS management to maintain the continuous visibility that ISO 27001 demands. The standard expects living, maintained systems — not annual snapshots.
Want to see your SaaS environment through an ISO 27001 lens? Book a demo and get an asset inventory with compliance gaps in 15 minutes.
NIS2 is the biggest EU cybersecurity regulation since GDPR — with major implications for SaaS. Learn what IT leaders need to know about compliance.
Learn proven SaaS data protection strategies, from classification to DLP, that keep your cloud data secure and compliant with regulations.
Unsanctioned SaaS apps create security blind spots traditional tools miss. Learn the top SaaS security risks and practical strategies for closing them.