Finding the right ISO 27001 audit firm is a critical step toward achieving certification and demonstrating your organization’s commitment to information security. An accredited audit firm can guide you through the certification process, assess your ISMS, and ensure compliance with the ISO 27001 standard.

To help you make an informed decision, we’ve compiled a list of top ISO 27001 audit firms known for their expertise, professionalism, and success in supporting businesses across various industries. Whether you’re seeking a recertification audit or preparing for your first assessment, these firms have the experience to help you achieve your goals.

Barr Advisory

With a practical, adaptive approach that simplifies ISO 27001 and ISO 27701 certification processes, Barr Advisory helps clients spend 75% less time on internal resources to pass an audit. 

Consilium Labs

With a sole focus on ISO 27001 certification, Consilium Labs gives clients access to a deep understanding of IT security, extensive compliance knowledge, and an innovative approach to certification.

Insight Assurance

Founded and operated by former Big 4 professionals, Insight Assurance takes a tailored approach to client audits. Compliance automation tools streamline the compliance process, and company leadership is involved at every step of the audit. 

Moss Adams

A top 15 audit firm, Moss Adams auditors offer industry specialization and deep knowledge of internal control validation. 

Prescient Assurance

The team at Prescient Assurance helps B2B SaaS companies complete thorough ISO 27001 and ISO 27701 audits that satisfy enterprise clients. They’re not only experts on ISO 27001 and ISO 27701, but also on cloud technologies and modern application security architecture. 

360 Advanced

360 Advanced partners with organizations seeking to assure data security, privacy, compliance, and processing integrity. With a focus on open communication, the firm works with clients to facilitate a thorough assessment of the organization’s IT security.