Kayo.
Kayo — Creation · Custom SaaS

From idea to live product, ready for your first subscribers.

You have spotted a need that existing tools cover poorly, and you want to turn it into a product sold by subscription. Kayo supports you from defining the first version to launch: user accounts, payment, admin area, product website. The goal is a usable product, not a demo.

Indicative timeline
8 to 16 weeks for a first version
Price
From €4,500
What happens today

The idea is clear. The path to a product is not.

It is not a lack of ambition. Software sold by subscription requires building blocks you cannot see from the outside.

How it works

Shrink the first version, then build what holds.

A SaaS launches with the minimum that is useful and can be charged for. The rest comes later, guided by the first users.

Step 01

The scope of the first version

We start from your idea and your future customers to define what must exist at launch. You leave with a short, priced list, and a list of what waits.

Step 02

The foundation and the screens

Accounts, subscriptions, payment, admin: the foundation is set up first. The business screens are mocked up, then developed on that foundation.

Step 03

Launch and first users

The product goes live with its presentation website. You invite your first users, we observe what gets in the way, and the next increment is decided on that basis.

What changes

Before and after: what actually changes.

You keep the idea and the relationship with your users. The product stands on its own.

SituationTodayWith Kayo
The feature listEverything is a priorityA short first version, the rest planned
Accounts and paymentPatched together afterwardsSign-up, subscription and invoices from launch
AdministrationManual edits in the databaseAn admin area to manage users and subscriptions
The product websiteA waiting pageA site that presents the offer and leads to sign-up
EvolutionsStarting from scratch with every ideaIncrements added on a stable foundation
You stay in control

What stays in your hands.

It is your product. You decide the scope, the price and the pace.

Tools involved

Proven tools, chosen to last.

The foundation is the same one many online products use. It is documented and depends on no single provider.

  • Next.js·application and product site
  • Supabase or PostgreSQL·database and accounts
  • Stripe·subscriptions and invoices
  • Vercel·hosting
  • Brevo·automated emails
  • Figma·mockups
« A product that does three things well beats a product that promises twenty and delivers none. »
Design principle
Illustrative example

An accountant who wants to sell his cash-flow tracking tool to other firms.

Fictional example to show the process. Timelines are those of a typical project and vary with scope.

  1. Weeks 1 and 2

    Scope

    The internal tool does fifteen things. Three are essential for another firm: importing bank statements, seeing cash flow thirty days out, sharing a view with the client. The rest waits.

  2. Weeks 3 to 6

    Foundation

    Accounts per firm, monthly subscription with a trial, admin area. The mockups of the three screens are approved while the foundation is built.

  3. Weeks 7 to 12

    Business screens

    The three features are developed and tested with two friendly firms. Their feedback changes the import screen, the most used one.

  4. Weeks 13 and 14

    Launch

    The product site goes live with its pricing page. The first subscribers sign up on their own. The next increment is decided from what they actually ask for.

Illustrative scenario: scope, timelines and features are examples. They are defined with you, based on your idea and your future users. An illustration is not a promise of results.

Frequently asked questions

Before you ask.

Do I need an in-house developer afterwards?

Not at launch. We can handle evolutions in increments or hand over to an internal team when one exists. The code and documentation are designed for that.

How are subscriptions and invoices handled?

Through Stripe, on an account in your name: free trial, monthly billing, invoices sent automatically, one-click cancellation. You see everything in your dashboard.

What does the “from” price include?

A complete foundation, accounts, subscription, admin, and a reduced first business scope. The amount depends on the number of screens and integrations. The quote details it before any commitment.

Can I start from an existing no-code prototype?

Yes. It serves as a living specification. We keep what has proven itself and rebuild on a foundation that can be charged for, secured and evolved.

Next step

Describe your project and we will reply with a clear proposal.

A few lines are enough: your business, what you expect from the project, your timeline. No need to have everything figured out.