At Prelude, security is not a one-off exercise or a box to check. It’s a continuous discipline that shapes how we design our infrastructure, build our products, and protect our customers at scale.

We are proud to announce that Prelude is now ISO/IEC 27001 certified, the internationally recognized standard for information security management. This certification confirms that we have implemented a robust, risk-based Information Security Management System (ISMS) and that security is embedded across our organization.

What is ISO/IEC 27001?

ISO/IEC 27001 is an international standard published by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). It defines best practices for establishing, implementing, maintaining, and continuously improving an Information Security Management System.

Rather than focusing on individual technical measures, ISO/IEC 27001 takes a holistic, risk-driven approach to information security. It requires organizations to identify security risks, assess their potential impact, and apply appropriate organizational and technical controls to mitigate them.

The standard covers a wide range of security domains, including:

• Risk assessment and risk treatment

• Access control and identity management

• Data protection and asset management

• Incident detection and response

• Business continuity and resilience

• Supplier and third-party security

• Continuous monitoring and improvement

ISO/IEC 27001 certification demonstrates that these controls are not only defined but actively maintained and improved over time.

Why ISO/IEC 27001 matters

ISO/IEC 27001 is widely recognized as the global benchmark for information security. It is used by organizations of all sizes across industries where trust, reliability, and data protection are critical, including fintech, healthcare, e-commerce, SaaS, and identity infrastructure.

For companies like Prelude, which provide authentication and messaging services that sit directly on the critical path of user access, this certification reflects a high level of operational maturity and a long-term commitment to security.

What does it mean for Prelude?

Achieving ISO/IEC 27001 certification confirms that Prelude has:

• Implemented a formal Information Security Management System

• Identified and documented information security risks across the organization

• Defined and enforced security policies and responsibilities

• Integrated security into product development and operations

• Established incident management and business continuity processes

• Put continuous improvement and internal review mechanisms in place

This certification is the result of sustained effort across teams and demonstrates that security is a shared responsibility at Prelude.

How ISO/IEC 27001 complements SOC 2 Type II

ISO/IEC 27001 and SOC 2 Type II address information security from different but complementary perspectives.

ISO/IEC 27001 focuses on how security is governed and managed across the organization. It requires a structured Information Security Management System, a formal risk assessment process, clearly defined responsibilities, and continuous improvement over time.

SOC 2 Type II focuses on how controls operate in practice. It evaluates whether security, availability, confidentiality, processing integrity, and privacy controls are not only designed correctly but also operating effectively over an extended period of time.

Together, the two certifications provide a comprehensive view of Prelude’s security posture:

• ISO/IEC 27001 demonstrates a globally recognized, risk-based security management framework

• SOC 2 Type II validates the operational effectiveness of specific security controls over time

By maintaining both certifications, Prelude combines strong security governance with proven operational execution, giving customers and partners a high level of trust and assurance.

What does it mean for our customers?

For our customers, ISO/IEC 27001 certification means confidence and transparency.

Confidence that their data is protected by an internationally recognized security framework.
Confidence that risks are identified and addressed proactively.
Confidence that Prelude operates with clear security governance and accountability.

For customers operating in regulated or security-sensitive environments, ISO/IEC 27001 also simplifies vendor risk assessments and supports internal compliance and procurement requirements.

Security at the core of our OTP and fraud-prevention infrastructure

Security and privacy are fundamental to Prelude’s mission, especially as we actively help our customers fight fraud.

This commitment extends directly to how we deliver secure OTP codes and authentication flows in an environment where threats such as SMS pumping, SIM swap attacks, and account takeover attempts continue to evolve. ISO/IEC 27001 reinforces the processes and controls that protect these critical systems and ensure their resilience over time.

Learn more

To learn more about our ISO/IEC 27001 certification, SOC 2 Type II compliance, and our broader security and compliance practices, visit our Trust Center:

👉 https://trust.prelude.so/

You’ll find detailed information about our security controls, certifications, and how we protect customer data.