For founders, side-hustlers & web studios

Build a Voice AI Agency With Zero Startup Risk

Set up a business, train Willow, capture leads — all free for seven days. Only pay when you land a paying client.

See the math
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The problem

Most side hustles die before they start

You want to start an agency but you're stuck: most platforms force you to pay upfront for months before you land a single client. That's how side hustles die.

How it works

Three steps to your first client

1

Create your account

Sign up in two minutes. No card, no commitment — just get in and look around.

Free · 2 minutes
2

Spin up a client business

Set up Willow for your client and train her on their data — their site, docs, and FAQs. Test everything before they ever pay you.

Free · 7-day trial
3

Land your first client

You set the price — whatever your market allows. You pay us $24/mo per business and keep the rest, every month, for every client you sign.

You keep the margin
For web studios & agencies

Already build websites? Add voice AI to what you sell.

If you run a web or design studio, you already have the hardest part — the clients and their trust. This is new recurring revenue from the client base you already have, with almost no extra sales effort.

💼

Revenue from clients you already have

Offer it on every site you build or manage. No new funnel to build — it's an add-on to work you're already delivering.

One line, drops into any site

Works on sites you've already shipped — any platform, no rebuild, no framework lock-in. Live in minutes.

🔒

Stickier retainers

An assistant that captures leads gives clients a reason to stay on your monthly plan — and a result they can point to.

The math

The numbers that make it worth it

One client, one flat platform fee. Everything above it is yours.

Client pays you
$150/mo
Just an example — you set your own price
You pay Stelt
$24/mo
Flat, per business. That's it.
You pocket
$126/mo
Your margin over the $24 fee

Same platform fee no matter what you charge. Your prices, your clients, your margin.

1 client
$126/mo
A nice side income
5 clients
$630/mo
Now it's a real business
10 clients
$1,260/mo
Recurring, and it compounds
🔑

Plus AI usage — on your own keys, at cost

On top of the $24, each conversation costs a few cents in AI — roughly 3–5¢ a chat, or about $5–15/mo for a typical small business. It's billed straight to your own Anthropic + Google keys at cost, with zero markup from us. Fold it into your price, or have your client bring their own keys — either way it stays transparent.

Rough example numbers, shown to explain how the model works — not a promise of earnings. The only fixed cost is the $24/mo platform fee per business. What you actually make depends on your market and what you charge: it could be less, or a lot more.

What you get

Everything you need to run each client

One platform behind every client you sign — no tools to stitch together, and no code to write.

🎙️

A voice AI assistant

Willow greets your client's visitors and answers them out loud, 24/7 — so they never lose a customer who shows up after hours.

🧠

Trained on their business

Point it at their website, paste their info, or upload a doc — it learns the business and keeps itself current on a schedule.

📥

Lead capture built in

Every enquiry lands in your dashboard and pings you instantly. Your client sees results from week one — that's what keeps them paying.

🖥️

Shows things on screen

Willow can pull up a video, a PDF, a price list, or any page of the site right inside the chat — not just talk.

🧩

Automations, built visually Coming soon

A drag-and-drop canvas wires simple nodes into workflows — capture a lead, trigger a follow-up, run a task on a schedule — so each client's busywork runs itself, no code.

One-line install

Paste a single line into any website and it's live in minutes. No developers, no rebuild — works on any site.

🗂️

Every client in one place

Each client is its own business — its own assistant, leads, and settings — all managed from a single login.

🔑

Bring-your-own-keys

AI runs on your own keys at cost, with no markup from us — predictable, transparent, and yours to control.

🎨

Her voice, their colour

Choose from natural voices and set the accent colour so the assistant matches each client's brand.

A peek inside

Wire a few nodes together, and it runs itself

A look at the visual builder — this example replies to every new lead automatically. Click the tool groups up top to explore what drops onto the canvas.

🔔On new leadTrigger
Lead
Email
Name
Phone
Message
🌐Business WebsiteWeb page
Write a response mess…Anthropic
Context 1
Context 2
Context 3
✉️Thank you for getting i…Action
To
Body

Run · just now

On new lead — new enquiry
Business Website — read the site
Claude — drafted a reply
Email — sent to the lead
Live preview · your dashboard, not this page — the real builder is inside Stelt.
The playbook

How to start your AI agency

You don't need to be technical, and you don't need clients first. Here's the exact path from zero to your first paying client.

1

Pick a niche you understand

Don't sell "AI to everyone." Pick one industry — dentists, salons, real estate, law firms, contractors, gyms — and become the obvious choice for it. A niche makes your pitch reusable, your demos sharper, and referrals easy. Most successful agency owners start in a world they already know.

2

Create your free account

Sign up in two minutes — no card, no commitment. You get the full dashboard and a 7-day free trial to build and test everything before you ever charge a client.

3

Build a live demo assistant

Spin up a business for a real prospect in your niche, point the assistant at their existing website, and let it train itself on their services and FAQs. In minutes you have a working demo on their own business — the single most powerful thing you can put in front of a prospect.

4

Set your offer and price

Decide what you charge and what's included — setup, monthly management, updates. Your only fixed cost is $24/mo per business plus a few dollars of AI usage, so whatever your market pays above that is your margin. Price for the value of never missing a customer, not for your cost.

5

Land your first client

Reach out with your live demo — local businesses, your network, a few DMs or emails a day. Showing a prospect their own assistant already answering questions closes deals a slide deck never could. When they say yes, they pay you and you go live.

6

Deliver, then repeat

Paste one line of code on their site and you're live. Leads start flowing into the dashboard, your client sees the value, and you collect a recurring monthly fee. Then do it again — every client you add stacks on the last, and the income compounds.

FAQ

Starting an AI agency — your questions

What is a voice AI agency?
A voice AI agency sets up AI voice assistants on other businesses' websites and charges a monthly fee to run them. With Stelt you build and manage each client's assistant from one dashboard, and keep the difference between what you charge and the $24/mo platform fee.
Do I need to be technical?
No. There's no code to write — the assistant installs with one line, and Willow walks you through the setup. If you can follow a guide, you can run it.
Do I need clients before I sign up?
No. You can set everything up during the free 7-day trial and build a live demo first, then land your first client. You only pay $24/mo once you have a paying client.
What does it cost to run each client?
A flat $24/mo platform fee per business, plus a few cents per conversation in AI usage — roughly $5–15 a month for a typical small business — billed to your own keys at cost, with no markup.
How much can I charge my clients?
Whatever your market allows. You set your own prices and keep everything above your costs — the margin is yours.
Can I manage multiple clients in one place?
Yes. Each client is its own business with its own assistant, leads, and settings, all managed from a single login.
Willow

Start your agency today.

Seven days free to set it all up. You only pay once you've got a paying client — so there's nothing to lose.