Custom development · Aix-Marseille
The software your company is missing — we build it with you
No off-the-shelf product forced onto your workflow. We start from your real process, build the tool that fits it, and transfer the full codebase to you at the end.
Technical audit, no commitment · Reply within 48h · No credit card
The same process. Two daily realities.
On the left, what we see at most SMEs on arrival. On the right, what your teams experience once the tool is live.
Your teams juggle Excel, WhatsApp, and paper to run a process that should already be automatic.
One application, designed for your business, that your teams open without a user manual.
How many times this week did someone on your team hand-copy information that already existed somewhere else?
Your current tools slow you down — not the other way around
A spreadsheet that crashes as soon as two people open it. A market tool bought out by a vendor that doubled the price in a year. Critical knowledge sitting in one person's head — the one who is never around when you need it.
These are not details. They are hours lost every week, multiplied by everyone who touches the process, and by every week nobody changes anything.
Ce qu'on développe
Trois façons de répondre à un besoin technique, selon là où vous en êtes.
Application mobile
Une app pensée pour vos équipes terrain ou vos clients, avec ou sans connexion internet.
Logiciel métier
Un outil interne qui remplace vos Excel et vos process bricolés, à l'image exacte de votre métier.
Refonte et reprise
Un projet existant mal codé ou abandonné, repris, documenté et remis en état de marche.
Pour qui, pour qui pas
Pour qui
Les PME et ETI qui ont un process métier précis à outiller, les dirigeants opérationnels qui en ont assez de faire tourner l'entreprise sur des outils bricolés, les DSI qui cherchent un partenaire externe fiable sur un projet ponctuel.
Pour qui pas
Si votre besoin est avant tout de l'intelligence artificielle générative embarquée dans un produit, direction notre offre développement de produit IA. Si vous cherchez un simple site vitrine, ce n'est pas notre métier — on préfère vous orienter ailleurs plutôt que de vous vendre quelque chose de surdimensionné.
40+
Projects delivered to production
6 wk
Average time to first prototype
100%
Projects with full IP transfer
Our method in 4 steps
You see your project move every two weeks — never all at once three months later.
See the full method- 01
Audit
We map your real need, not the one imagined from a requirements document alone.
- 02
Scoping
A precise perimeter, a firm quote, no surprises along the way.
- 03
Sprints
Deliveries every two weeks that you can test before the next round.
- 04
Transfer
The code, the documentation, and the intellectual property — all yours.
From audit to delivery. No black box.
Most clients start with the technical audit — that is where we precisely size the perimeter.
Technical audit
30 minutes to frame budget, timeline, and feasibility.
A free conversation with a senior developer. You leave with a written summary within 48h — usable with us or elsewhere.
30 min · Free · Written summary within 48h
Business software
Replace your spreadsheets with a custom tool.
Internal software built on your real process — not a generic ERP you have to work around.
Mobile application
Field, sales, or customer — an app that holds up.
React Native or native depending on your needs. Offline support, data sync, store publishing included.
Rebuild & takeover
Regain control of a stuck project.
Vendor gone, technical debt, unreadable code — we audit first, and rewrite only when necessary.
Four questions before you start.
The questions we hear most often about custom development projects.
Does my project necessarily need artificial intelligence?
No. We also build classic tools; AI is added only when it delivers measurable value. For a project centered on embedded AI, see our dedicated AI product development offer.
How much does custom business software cost?
It depends on scope — each offer details its price range. The technical audit delivers a precise quote within 48h.
How long to get a first prototype?
Usually between 4 and 8 weeks depending on complexity, thanks to short sprints and intermediate deliveries.
Do I own the code that is developed?
Yes — intellectual property is transferred 100% on delivery, with no dependency on Katalyx.
See your business tool running in 8 weeks.
A technical audit to frame the perimeter, two-week sprints to move visibly, and code that belongs 100% to you at the end.
Audit with no commitment · Reply within 48h · No credit card