ISO 42001 vs NIST AI RMF vs EU AI Act (and US Rules)
The EU AI Act is law. ISO/IEC 42001 is a management system standard. The NIST AI RMF is a voluntary framework. Here is how they differ, how they fit together, and what changed in US rules in 2026.
Updated
Buyers often hear three names together: the EU AI Act, ISO/IEC 42001 and the NIST AI RMF. They are different kinds of things. This guide compares them, then covers the US rules that changed in 2026.
This guide is general information. It is not legal advice.