You do not need a private directory of buyers. Federal agencies already name themselves on the contract notice, and they pick a category for what they bought. Contract Horizon turns those notices into two public lists: one by agency, and one by category. Both count contracts that are ending, not open tenders.
The category on the notice is a UNSPSC code
AusTender uses the UNSPSC code set. The agency chooses the code that best matches the main purpose of the contract. The first two digits are the broad segment, such as information technology or building services. The next digits narrow it.
The same kind of work can sit in more than one code, because two agencies can describe it differently. If you sell training, you may need to look at more than one segment. Search the description as well as the code. The category pages are grouped into goods and services so you can scan them.
See a category, then the agencies in it
Open the category report and choose the segment closest to what you sell. Each category page, at /report/ followed by that category's short name, shows how many contracts in that segment end in the next 3 to 12 months, the published value, and which agencies hold them. The counts come from contract notices. They are not a forecast of what the agency will buy next.
Open the agencies list and then one agency to see its largest categories. That is the practical answer to "who buys what I sell": the agencies that already have contracts in your category, and when those contracts end.
A category page does not show supplier names unless you are signed in. The public page is the totals and the agencies.
Plans are the other half
A contract end date tells you when current work is due to finish. An annual procurement plan tells you what an agency says it expects to take to open tender. They are not the same list. Reading annual procurement plans explains what those plans include and what they leave out. Use them beside the category page, not instead of it.
How often the supplier changes
On Pro and Team, a contract can show a re-tender score. The score is the share of similar earlier contracts at that agency where the next notice went to a different supplier. It is history, not a promise that this contract will be competed. How the re-tender score works sets out the bands and the limits. A higher band means the supplier changed more often in that history. It does not mean the next one is certain.
When you know the category, open the category report or the agencies list, then the contracts list filtered to that category and to 6–12 months.
Contract Horizon is an independent reading of the public record. It is not part of AusTender or the Australian Government.