What Is a Digital Twin?

A digital twin is a virtual representation of a real-world entity that is continuously updated with data from its physical counterpart. The concept originated in manufacturing and industrial engineering, where digital twins of machines, buildings, and supply chains enabled predictive maintenance, performance optimization, and scenario modeling. In its broadest sense, a digital twin is any computational model that mirrors a physical system closely enough to simulate its behavior under varying conditions.

The term was first formalized by Michael Grieves at the University of Michigan in 2002, in the context of product lifecycle management. NASA subsequently adopted digital twin methodology for spacecraft simulation. By the 2020s, the concept had expanded far beyond industrial applications into healthcare, urban planning, and — most significantly for the identity economy — human identity replication.

From Systems to People

The application of digital twin technology to human identity represents a fundamental expansion of the concept. An industrial digital twin replicates the physics of a turbine or the logistics of a warehouse. A human digital twin replicates the appearance, voice, mannerisms, and communicative behavior of a specific individual. This shift from system modeling to identity modeling introduces entirely new technical, legal, and ethical dimensions that the original digital twin framework was never designed to address.

When applied to people, digital twins move from the domain of engineering into the domain of personality rights, biometric sovereignty, and identity commerce. The $975 million acquisition of Khaby Lame’s Step Distinctive Limited in January 2026 demonstrated the commercial scale this transition has reached.

Market Context

The global digital twin market was valued at approximately $12.7 billion in 2025, with projections exceeding $110 billion by 2030. While the majority of this value remains in industrial applications (manufacturing, energy, infrastructure), the human identity segment is the fastest-growing subsector, driven by demand for AI-powered content generation, livestream commerce, and creator economy infrastructure.

See also: AI Digital Twin, AI Avatar, AI Clone, Biometric Sovereignty