Sustainability accreditation for real impact.

Do you trust that a sustainable world is possible? We do.

Assurance Services International (ASI) enables sustainability systems to strengthen their resilience and integrity through oversight and capacity building.

Independent accreditation for voluntary sustainability standards is provided by our North America office. Our global team applies data and deep knowledge of the sustainability landscape to deliver high quality accreditation services.

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Why work with us?

ASI in North America leads the way for businesses, communities, and stakeholders

to confidently collaborate with sustainability systems, driving impact for people and the planet.

We work with organizations worldwide to strengthen accountability, safeguard credibility, and embed responsible practices that build lasting trust.

Our services

Accreditation

Demonstrating integrity and building global confidence through our accreditation services, aligned with ISO/IEC 17011:2017.

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Find a certifier

ASI approves accredited Conformity Assessment Bodies to verify and certify compliance with sustainability standards.

Participants in ASI’s Two-Tier Assurance Program display both their ASI and accreditation body codes.

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Sector news, insights, events and influence

Updates

Accreditation is the foundation for trustworthy sustainability certification

17 July 2026

While sustainability certification is no game, it does require fairness and consistency to function well over the long term.