Infrastructure & engineering

Take back
control
of your data.

We migrate your email, documents and services to open infrastructure under your control. Fewer licences, more sovereignty, and data that stays where you decide.

No commitment · Everything under NDA from the first message

Sound familiar?

Do your tools really
belong to you?

Rising subscriptions, changing terms, data hosted who knows where: dependency has a cost.

Licences go up every year

The price changes, so does the user count. The budget follows, and you have no say.

You don’t know where your data is

Hosted by a third party, sometimes outside Europe, subject to laws other than yours.

Switching provider seems impossible

Closed formats, incomplete exports: everything is designed to keep you in.

Configuration is complex and risky

Powerful but poorly configured tools expose your accounts and documents.

What we do

Migrate without disruption,
gain independence.

Open, auditable and long-lasting solutions, deployed and secured by our engineers.

01
Email & calendars

Your email, on your infrastructure

Migration of mailboxes, contacts and calendars to an open-source solution hosted where you choose.

Mailboxes, contacts and calendars migrated
Hosting of your choice
Secure access
02
Documents & collaboration

Share without depending

Storage, sharing and collaborative editing of documents with open tools.

File sharing
Collaborative editing
Controlled permissions
03
Sovereignty

Data where you decide

Hosting on your premises, in Switzerland or in Europe, with open, reversible formats.

Controlled hosting
Open formats
Guaranteed reversibility
04
Support

A transition your teams accept

Gradual migration, user training and support throughout the transition period.

Gradual migration
User training
Transition support
Our method

A migration
without disruption.

01

Inventory

We map your tools, data, uses and dependencies.

02

Choosing solutions

We propose suitable open alternatives and measure their impact.

03

Pilot migration

A first group of users migrates, and we adjust.

04

Full switchover

Migration of the rest of the company, training and support.

What you get

What you get.
Your independence.

Data under your control

You know where it is and who has access.

Open formats

You can change provider — including us.

Fewer licences

A budget no longer tied to a vendor’s pricing policy.

Why Security255

Systems engineers
who think like attackers.

Over 23 years on Linux

Systems engineering is where we come from. We don’t discover your systems — we know them from the inside.

Open source and sovereignty

Open, auditable and long-lasting technologies. Your infrastructure doesn’t depend on a vendor’s commercial policy.

Security first

We are a cybersecurity firm. Segmentation, encryption and access control are part of the project, not an option.

Hardware supply: we specify, supply and integrate the hardware required as part of the project.

Go further

Related services and resources.

Servers & virtualisation

The infrastructure that hosts your new tools.

View the service

Custom development

When a specific tool is needed.

View the service

Why Microsoft 365 needs serious configuration

Our article on the risks of poor configuration.

Read the article

Ready to
work together?

If someone recommended you speak with us, that recommendation already carries more weight than any sales argument. Tell us who you are and what you protect.

NDA GDPR LPD
Available right now Direct response within 24 business hours
First conversation, no cost
30 minutes to see if we're a fit. No commitment on either side.
Total confidentiality
Everything you share is covered by NDA from the first message.
Direct access to the team
A member of the technical team responds. No intermediaries.

Request access

Tell us about your company. We handle the rest.

✦ Request received. A senior professional will contact you within 24 hours.

Information handled under NDA · GDPR · LPD/nLPD — absolute confidentiality.

Relevant information

Protect your business from

digital risks.

Resources

Access resources and content relevant to your business.

Open Resources

Actions after an attack

Critical steps to regain control after a cyberattack

Read article

Local presence

Cybersecurity services for businesses in Annecy.

Learn more