A family business from San Martín, Mendoza
Sergio Martinez founded KeySistemas in 1995. Today the three of us run it: Sergio, Tomás and Gonzalo.

Our history
The first jobs were invoicing systems written in DOS for local shops. KeyGestión appeared with Windows. It has been rewritten several times since then and is still the core system.
Tomás and Gonzalo joined later. Since 2020 five new systems have come out: orders, online store, medical gas, packing and transport.
30
years building management systems
200+
companies use our systems today
97%
of our clients stay with us the following year
The team
When you call, one of the three of us answers.
Sergio Martinez
Founder and software developer
He founded the company in 1995. He develops the core of KeyGestión and has been supporting clients ever since.

Tomás Martinez V.
Programmer analyst
He develops and supports the systems released after 2020.
Gonzalo Martinez V.
Web development
He develops KeyTienda and the company web applications.
How we work
An implementation goes through these three stages.
We survey
We go to your company and look at how you work today: invoicing, stock, purchasing.
We adapt and install
We adjust the system to your workflow, install it on your server and migrate your data.
We provide support
After go-live we keep answering by phone and WhatsApp.
Frequently asked questions
Will you still be around in ten years?
The company has been running since 1995.
Where are you?
In San Martín, Mendoza. We work with companies across the province and the rest of the country. If you are nearby, we come to see you.
How does support work?
By phone or WhatsApp, with someone who knows your installation. If needed, we connect to your server remotely.
Let us talk
Tell us what you do and what you need.
- KeySistemas · San Martín, Mendoza · since 1995


