Tailored software
Custom business apps, ERP implementation & customization, ECM and document workflows.
A human-sized digital studio · Luxembourg
Engineered to last.
Priced to make sense.
We keep your business competitive with robust, dependable solutions — software, integration and, once the foundations are stable, AI — built around the way you actually work, preserving your autonomy and sovereignty.
The challenge
The world keeps accelerating.
Standing still quietly costs you.
Systems that don't talk to each other? Hours lost to manual work? Custom software that feels out of reach?
C123 turns that pressure into a clear, manageable path forward, at a pace that fits your business.
What we do
One studio, the whole digital picture.
From a single tailored tool to your entire systems landscape: pragmatic, standards-based, and always built around your business. Built on more than a decade spent in every seat: building the software, integrating the systems, advising on them, and running IT in-house.
Integration & interoperability
Making your systems finally talk to each other — including legacy — with APIs, EDI and e-invoicing (Peppol).
AI & automation
Document AI, workflow automation and assistants that remove repetitive, manual work.
Data & insight
Migration, cleanup, reporting and BI dashboards that turn data into decisions.
Web, e-commerce & mobile
Presentation sites, customer portals, online shops and mobile apps that fit your brand.
Advisory, training & support
Strategy, audits, project management, training and dependable, ongoing support.
Need hardware, a security audit, or someone to manage your infrastructure? We handle all of it with a trusted partner.
The journey
From first hello to autonomy and long-term support.
A clear, predictable path, so you always know where we stand and what comes next.
- Step 1
First conversation
We listen: your goals, your constraints, your people.
- Step 2
Needs analysis & report
We map the real need and hand you a clear, concise report.
- Step 3
Proposal & plan
A pragmatic plan: scoping, identifying the key people, drawing up the plan, and a price that makes sense.
- Step 4
Build & test
We build on proven foundations, with you.
- Step 5
Go live
A smooth handover, and your team trained to master the solution.
- Step 6
Support & evolve
Dependable support and long-term follow-up.
Where we work
See your business here.
Most of our work has been in industry, retail and services for SMEs of roughly 10 to 200 people.
Find your field, see what we'd build, and tap a tile for details.
Let's talk
- Emailinfo@c123.eu
- WhereLuxembourg & remote
- ResponseWithin 1 business day