How to write a client proposal with AI that sounds like you

You have just come off a good discovery call. The client talked for most of it, you took notes, and you could feel where the work should go. So you open ChatGPT and type: "Write a proposal for a website redesign for a small accountancy firm." You get something like this (example, not a real run):

We are delighted to present this proposal. Our team brings extensive experience and a proven track record of delivering high-quality, results-driven solutions tailored to your unique needs.

If you want to use AI to write a client proposal that doesn't read like a template, give it what you heard on the call, what you are offering and why you, and it will write for this client instead of for anyone.

Why does an AI proposal sound like a template?

Because a template is all it can write when it knows nothing. Your request named a service and a type of business. It did not say what the client is struggling with, what you agreed to look at, or why they should choose you over the next person they speak to.

So the AI fills every gap with the average. Average problems, average promises, average confidence. It is not being lazy. It is guessing, and a guess about a proposal sounds exactly like every other proposal.

The client can tell. They just told you something specific about their business, and the document that comes back could have been sent to anyone.

A proposal is only as specific as the brief behind it.

What should you give AI before it writes a proposal?

Before you ask for a word of the proposal, give it the material only you have. That means the client's situation, the scope you discussed, and the case for you.

The discovery-call notes, anonymised

Start with your notes from the call, in the client's own words where you can. What is going wrong for them, what they have already tried, what they are worried about, and what good would look like.

Strip out names and anything identifying first. The client becomes "the client", their firm becomes "a small accountancy practice", their staff become roles. The AI does not need to know who they are to understand what they need, and you keep their details where they belong.

Your offer and the scope

Next, say what you are actually proposing. What you will do, what you will not do, what the client receives at the end and how you will work together. If you discussed options on the call, list them.

This is where most generic proposals go wrong. Without a scope, the AI invents one, usually a broad and slightly inflated one, and then you spend the afternoon taking things out.

Your proof and your difference

Finally, tell it why you. A relevant piece of past work, a result a client would recognise, the way you work that others do not. Real things, not adjectives.

If you already keep an AI Brief, a document about your business that you paste in before you ask for anything, this part is done. Paste it in, add the call notes and the scope, and then ask for the proposal.

Before and after

Here is the original request, the one that produced the boilerplate above:

Write a proposal for a website redesign for a small accountancy firm.

Here is the briefed version:

I'm a freelance web designer. Write the opening section of a proposal for a client I spoke to today. Use my notes and don't invent anything.

Notes from the call (anonymised): small accountancy practice. The partners say the current site "looks like it was built for a different firm". Most enquiries come by phone and they want the site to do more of the explaining. They tried a page builder last year and gave up. Their main worry is that a new site will take up time they don't have during the busy season.

Scope we discussed: rewrite and rebuild the main service pages, add a clear enquiry route, and I handle the content drafts so they only review. No blog, no rebrand.

Why me: I've rebuilt sites for other professional service firms and I write the content myself, so clients aren't left with blank pages to fill.

Tone: plain, warm, no jargon, no "delighted".

And here is the kind of opening that brief produces. This is an example written to show the difference, not the output of a real model run:

Example only:

You told me your site looks like it was built for a different firm, and that most of your enquiries still arrive by phone. This proposal is about fixing both. I'll rewrite and rebuild your main service pages so they explain what you do before anyone picks up the phone, and add a clear way to get in touch. You won't be handed blank pages. I draft the content and you review it, so the project fits around your busy season rather than through it.

Same AI, same job. The difference is that the second version is built from things the client actually said, which is why it reads like it was written for them.

Keep it sounding like you

Once the draft is close, read it out loud. Anywhere it sounds like a brochure, tell the AI which line and why: "this sounds like a sales page, say it the way I would on a call". Then ask it to check every claim against your notes and flag anything it added.

That last check matters. AI is good at filling a gap with something plausible, and in a proposal a plausible invention is a promise you never meant to make.

What it won't fix

It can't price the work. The AI does not know your costs, your capacity, what this client can bear or what you would walk away from. Pricing is your judgement, made with information that was never in the chat.

It also can't know what the client didn't say. If they left out a concern on the call, or said one thing and meant another, the proposal will be built on the version you heard. A briefed AI writes a sharper document from your notes. It doesn't make your notes complete.

And it won't decide the scope for you. If you were unsure on the call what the client really needed, a polished proposal will just hide that uncertainty more convincingly. Sort it out with the client first.

One thing to do today

Find the notes from your most recent discovery call. Before you write anything, rewrite them in the client's words, anonymise them, and add a short paragraph on scope and a short paragraph on why you. That is the brief. Paste it in and ask for the opening section only.

If you want the whole process, from preparing for the call to the proposal and the follow-up, the AI sales course works through it step by step.