About

A one-person firm,
equipped like a team.

ACX Fonteray is a sole proprietorship under Swiss law. It designs, builds and runs applications, and works across Switzerland and in neighbouring France, in French, German and English: no agency, no sales layer, no intermediary between the person who decides and the person who writes the code.

That is as much a constraint as a choice. A firm this size cannot run four projects at once, and says so. In return, the client always speaks to the same person — the one who wrote the code, who holds production, and who will answer when it breaks on a Sunday evening.

The difference in capacity is made elsewhere: in a well-equipped workshop and in three machines that work while we sleep. That is what makes it possible to hold to a team's lead times with a craftsman's structure.

The name and the mark

Why “ACX Fonteray”

Swiss law requires a sole proprietorship's registered name to contain the surname of its owner. Hence the full name, on contracts and invoices. Day to day, the brand remains ACX: that is what appears on the site, in emails and on deliverables.

The mark says what the firm does. Two peaks and a waterline, enclosed in a circle: we build upwards, but on a stable level. The line is the only red part of the logo — it is the base, and it is what holds up everything else. On a dark background the strokes turn light grey and the line keeps its original red.

What we hold to

Four principles, held to even when it costs

Say no early

A badly set-up project shows at the scoping stage. Saying so costs an engagement; keeping quiet costs a reputation.

Write down what is decided

A decision that isn't written down does not exist. It will be replayed, usually by someone who wasn't there.

Never lock anyone in

The credentials, the code and the infrastructure belong to the client from day one. An exit route is not a paid extra.

Own the failures

We say what happened, we fix it, we write down what was missing. Nobody was ever reassured by silence.

Milestones

The path here

Short, and that's fine: three true lines beat a page of reconstructed career history.

Today

Two platforms, one workshop

UpGreg in operation, Kailo Location in development, and passing on the know-how becoming a service in its own right.

2026

The workshop takes shape

Three specialised machines, a continuous integration pipeline used without exception, safeguards written down and built into the contracts.

Before

The trade, in a team

Years designing and running applications inside larger organisations — that is where you learn what breaks in production.

Shall we talk?

Thirty minutes, no obligation. You will know whether it is workable, and who you would be working with — the same person from the first day to the last.

Get in touch