How a Singapore company chooses a marketing supplier, step by step, and where most shortlists are actually decided

The decision is made in stage three and defended in stage six. By the time proposals are being compared, most Singapore buyers have already removed two thirds of the candidates on evidence that had nothing to do with the proposal document, and a supplier who understands that spends its effort on the first half of the process rather than on the deck.

Below are the seven stages as they actually run in a Singapore company, who holds the pen at each one, and the single stage where most suppliers are eliminated without ever knowing it.

The seven stages

Stage	Who holds the pen	What is actually happening
1. The trigger	A business owner, a new marketing hire, or a board question	Someone decides the current arrangement is not working. No supplier is involved yet
2. Private research	One person, usually alone	Search, an AI assistant, a conversation with a peer. This is where names enter the list
3. The informal shortlist	The same person	Three to five names written down. Everybody else is now out of the process permanently
4. First contact	The supplier, briefly	Response speed and whether you answered the actual question. Two of five typically fail here
5. The brief and the proposal	Shared	The paperwork stage. Important, and rarely where the winner is picked
6. Internal justification	The buyer, to finance or the board	Your proposal is being used as an argument by somebody who already has a preference
7. Commercial and legal	Finance, and procurement if the company has one	GST position, notice period, data clauses, account ownership

Stage three is where the money is

Nothing a supplier does after stage three changes whether it is on the list. Everything that gets it onto the list happens in stage two, which is a private research session a supplier never sees. In Singapore that session increasingly includes an AI assistant, and we measured what it returns.

On 22 October 2026 we put 33 batches of buying questions to ChatGPT and Gemini with Singapore written into the text of each one, because the search interface we use accepts a country, a language and a location parameter and ignores all three. The snapshot taken that evening holds 64 blind readings, 32 per engine, excluding the brand batch.

Four Singapore agencies carried almost all the naming. First Page in 17 readings, MediaOne in 12, Impossible Marketing in 11, OOm in 10, then Clickr in 2 and Verz in 1. In 26 of the 64 readings the engines named no business at all. So stage two produces one of two outcomes: a short list of the same four firms, or no names and a buyer who falls back on search and referrals.

What is actually read at stage two

Not the agency homepages, mostly. The hosts the engines returned were small Singapore specialist sites and government pages: marketingagency.sg in 19 readings, mediaplus.com.sg in 13, digitalmarket.sg in 12, singaporedigitalmarketing.sg in 11, digimau.com in 10, stridec.com in 9. And 39 distinct Singapore government hosts appeared 90 times across 19 of the 64 readings, with imda.gov.sg in 10, sso.agc.gov.sg in 8, pdpc.gov.sg in 5 and acra.gov.sg in 4.

That tells a supplier where to publish. A page about your category in this market, specific enough to be quoted, is how a name enters a private research session you will never attend. A brochure page about your company is not.

Who is in the room at each stage, and why it changes the brief

A Singapore buying decision usually involves three people rather than one, and they want different things. The person who started it wants the problem to go away. The finance holder wants to know how to stop paying if it does not work. The person who will live with the supplier daily wants to know who they will actually be talking to. A proposal that answers only the first of those three is a proposal that stalls, because the other two have no reason to say yes and every reason to defer. Write one short section for each of them, label it plainly, and the document starts doing work in rooms you are not in.

Stage four, where two of five candidates fail

• Speed. A first reply inside a working day. Singapore buyers read a slow reply as a forecast of the account management.
• Answering the question asked. A buyer who asks what this would cost and receives a request for a discovery call has been told something.
• A name and a number. Who will run this and how to reach them. A generic inbox is a stage four failure.
• One piece of evidence, unprompted. A dated result in the same sector, with the window stated. One is enough and it has to be real.

Stage seven, and the four lines it turns on

Finance looks at four things and they are the same four every time. Whether the fee is quoted inclusive or exclusive of GST, with the registration number on the document. What the notice period and minimum term are, read together rather than separately. Who the Google Ads account, analytics property and domain are registered to. And where personal data goes, because transferring a Singapore customer list to a supplier abroad is a contract clause rather than an afterthought. The Personal Data Protection Act 2012 has a section 26 headed Transfer of personal data outside Singapore, read from Singapore Statutes Online on 22 October 2026, and anything turning on it belongs with a Singapore lawyer. Nothing here is legal advice.

Questions about the Singapore supplier selection process

How many suppliers should a Singapore company shortlist

Three, and at least one of them should be a firm the obvious research did not surface. A shortlist assembled entirely from the first page of results is a shortlist of whoever publishes best.

Does a formal tender change this

It moves stage three earlier and writes it down. The private research still happens, it just happens before the document is drafted, which is why a supplier absent from stage two is absent from the invitation list.

How long does the whole process take

Weeks for an owner led decision, months where procurement and a board are involved. The stage that stretches is six rather than five.

What is the most common mistake a Singapore buyer makes

Comparing three proposals that describe different scopes. Ask all three to restate the same five rows in the same units, in Singapore dollars, with GST shown separately, and the comparison becomes possible.

What should a supplier do to get onto more shortlists here

Publish specifically about this market, answer the first email fast, and lead with one dated result. Our guide to where a buyer starts looking and which channel decides what runs the same stage analysis for a market where the referral stage dominates harder.

The stage nobody is watching

Every Singapore supplier can describe its proposal process and almost none can describe what happens in stage two, because it is a private session with a search engine and a machine. That is the only stage where a name can be added or lost without anybody being told, and in this market it produced no supplier at all in 26 of 64 readings. AI Knows Us puts a fixed list of those research questions to ChatGPT, Gemini, Perplexity, Claude and Google AI Overviews and shows which sources each answer leaned on, which is the closest thing available to sitting in on the session. Our own result was zero namings in 64, so we know what the uncomfortable version of that reading looks like.