Three things to check with any provider before you sign up.
Privacy
AI receptionists record or transcribe calls and store callers' details. Ask each provider where recordings and transcripts are stored (some offer Australian data residency) and how long they're kept. Call recording rules vary by state and territory, so tell callers if calls are recorded. The Office of the Australian Information Commissioner (oaic.gov.au) publishes privacy guidance for businesses.
Australian phone numbers
Check whether you get a local geographic number, a 1300 number or a 1800 freecall number. To keep your existing number, ask whether the provider can port it in, and out again if you leave.
Prices and GST
Every Australian price here is in Australian dollars (AUD), copied from the provider's own pricing page. Of the 17 providers listed, 4 say prices exclude GST, 2 say prices include it and 11 don't say, shown as Unknown.
General information, not legal advice.