AI Authority Index

Glossary

AI Authority Index™

Third Hemisphere™'s public measure of which companies AI engines name, recommend, and caution against when Australian buyers ask them for help. It is published one market at a time.

What it tells a buyer or a marketer

Buyers now ask AI assistants which company to choose before they search, and the answer often settles the shortlist. The Index shows, market by market, which companies those answers put forward, which they caution against, and which they leave out.

For a buyer, it is a read of what the engines are telling other buyers in the same market. For a marketer, it shows where a company stands in those answers beside its competitors, measured the same way for every company.

How an edition is made and published

Each edition asks a market's own buyer questions of five AI engines, reads every answer, and places each company the engines name. Companies named in 30 or more answers form the Leaderboard, each scored on all five CRISP™ factors and placed on the Star Chart™. Every other company named is listed Under the Radar, with the number of answers that named it.

No company can pay to be included or to be placed, and Third Hemisphere's clients are measured on the same instrument as everyone else. An edition passes the publication gate before it publishes, and it stands until the next edition of that market replaces it.

What moves a company's place

A company's place moves when the answers move. The engines answer from what is published about a company, so coverage in the sources they cite, a site they can read and quote, and a consistent public record are what change the next edition's reading. The CRISP methodology publishes how a run is collected and scored.

Related terms

The Index is built on CRISP, Third Hemisphere's measure of five factors, and draws each market on the Star Chart. Each edition is scored on the answers one wave collected, and divides the companies named into the Leaderboard and Under the Radar. The free AI Authority Check™ and the AI Authority Blueprint™ read a single company on the same factors.

See also

Read the AI Authority Index

Questions

Who publishes the AI Authority Index?

Third Hemisphere publishes it, one market at a time, and the method behind it is published on the CRISP methodology page.

Can a company pay to appear in the Index?

No. No company can pay to be included or to be placed, and Third Hemisphere's clients are measured on the same instrument as everyone else.

How often is a market updated?

An edition stands until the next edition of that market replaces it. Each edition says which answers it was scored on.

How can I see where my own company stands?

Run the free AI Authority Check for your company's place on the same chart, or commission the AI Authority Blueprint for a full report on your company.

Defined facts

  • Defined by Third Hemisphere Pty Ltd (ABN 60 616 085 673).
  • First published by Third Hemisphere on 1 October 2026.
  • Used in the AI Authority Index since Edition 1 (1 October 2026).
  • Last updated 18 October 2026.

Questions about a term, or about where your own company stands? Book a discovery call.

Written and maintained by the Third Hemisphere team.

© 2026 Third Hemisphere Pty Ltd. All rights reserved. The definitions, the CRISP method, and the AI Authority Index are the copyright of Third Hemisphere Pty Ltd.

Third Hemisphere and the Third Hemisphere logo are trade marks of Third Hemisphere Pty Ltd.

AI Authority Index, AI Authority Check, AI Authority Blueprint, CRISP, Star Chart, AI Famous, AI Infamous, Rising Star, Bad Press, Cult Favourite, and Off the Guest List are trade marks of Third Hemisphere Pty Ltd. Applications to register them are being prepared.