Contact
One mailbox, read by a person.
There is no contact form on this website, no chat widget, no calendar link and no telephone number. Everything reaches [email protected], and the table below says what to put in the subject line so it is routed correctly.
Routing
1Subject lines and response times
The times below are commitments rather than aspirations. If one is going to be missed, you will be told before it is missed.
| Subject line | Use it for | Response |
|---|---|---|
| Question | Anything about the measures, the boundary, or whether this would apply to your pipeline | 5 business days |
| Wrong | Telling us the premise, the maths or a claim on this site is mistaken. The most welcome message on the list | 5 business days |
| Privacy request | Access to or correction of personal information we hold about you, under Australian Privacy Principles 12 and 13 | 30 days |
| Delete my data | Deletion of the correspondence and any other information we hold about you | 30 days |
| Privacy complaint | A complaint about how we handled personal information | Acknowledged in 5 business days, answered in 30 days |
| Security | A suspected vulnerability in this website, or a suspected data breach | Same or next business day |
| Press | Media enquiries. Please read the status section on the front page first, because the answer to most questions is that nothing has shipped | 5 business days |
A contact form that posts nowhere is worse than no form at all, and a form that posts somewhere needs a script, a third party endpoint and a place for the message to sit. An email address needs none of those, works without JavaScript, gives you a copy of what you sent, and leaves the record in your hands as well as ours.
Detail
2What makes a message easy to answer
None of this is required. It shortens the exchange from three messages to one.
If you run a retrieval system
- Roughly how many documents are in the index, and roughly how many questions a day it serves.
- Whether you have any relevance judgements at all today, even an informal spreadsheet.
- What made you look. Usually there is a specific answer that went wrong and somebody remembers it.
If you are reporting a defect on this website
- The page, your browser and roughly what you were doing.
- Whether you have JavaScript disabled or reduced motion turned on. Both are supported here and both are worth checking when something looks wrong.
If you are reporting a security issue
- Send it before publishing it, and we will not treat a good faith report as hostile.
- This site is static. There is no login, no database and no user content, so the plausible surface is small, but the address is monitored for it regardless.
Limits
3What we cannot help with
Stated so that a message that will disappoint you is not sent in the first place.
- Building or hosting your retrieval pipeline. This company is not a consultancy and does not take that work.
- Recommending a vector database or an embedding model. We have opinions and no evidence, and a recommendation without evidence is exactly what this whole site argues against.
- Access to the prototype. It is not packaged, not documented and not published, and handing it over would waste your afternoon.
- Investment enquiries. The company has taken no outside investment and is not raising.
- Employment. There are no open roles and no recruitment process to enter.
A short honest no arrives faster than a polite maybe, so that is what you will get.
Entity
4Who you are writing to
The registered details, and where to verify each of them without asking us.
- Legal name
- ARCUS AI PTY LTD
- Entity type
- Australian proprietary company
- ACN
- 697 547 505
- ABN
- 82 697 547 505
- GST
- Registered for GST
- State
- New South Wales
- Registered
- 2026. Nothing has been published since
- Trading name
- Arcus is a trading name of ARCUS AI PTY LTD
- Verification
- The ABN, the entity status and the GST position are published free of charge at abr.business.gov.au. The ACN sits on the register maintained by the Australian Securities and Investments Commission at asic.gov.au
- Service of documents
- The registered office recorded against ACN 697 547 505 at ASIC is the address with legal effect for service. We do not publish a second address here, because a second address would not have that effect
For the handling of personal information sent to that mailbox, see the privacy policy. If a complaint about privacy is not resolved to your satisfaction, you can take it to the Office of the Australian Information Commissioner (OAIC), GPO Box 5218, Sydney NSW 2001, telephone 1300 363 992, oaic.gov.au. There is no fee and you do not need our agreement.