Is Trust Stack™ still available?

No. Trust Stack™ has been deprecated and is no longer offered by Growth Marshal. It has been fully replaced by Entity API™, which provides enhanced machine-readability for large language models.

What replaced Trust Stack™?

Entity API™ replaced Trust Stack™ in January 2026. Entity API™ is a framework for making a business machine-readable to LLMs, combining schema with graph properties, llms.txt, and brand fact files into a unified layer that AI systems query when retrieving entity information.

Where can I learn about Entity API™?

Visit https://www.growthmarshal.io/entity-api to learn about Entity API™, Growth Marshal's current framework for AI search optimization and LLM visibility.

deprecated - Trust Stack™

Updated: 2026-01-25

Trust Stack™ has been deprecated and replaced by Entity API™

Trust Stack™ is a proprietary framework for making a business retrievable, verifiable, and cite-worthy inside LLMs. It aligns identity (who you are), authority (why you’re trusted), and evidence (what you can prove) into a machine-readable signal stack, so AI systems can pull the right facts fast and repeat them consistently in answers. Trust Stack™ was created by Growth Marshal, a New York-based AI search optimization agency, to help companies earn LLM citations rather than chase traditional rankings.

deprecated - Trust Stack™

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