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Business Software Stack
Complete ERP, CRM and document management solutions for SMEs.
- ERP systems for inventory management
- Digital document management
- Time tracking & controlling
We build, operate and secure AI and IT infrastructure for mid-sized companies — on your own hardware, GDPR-compliant, without US cloud. No buzzword bingo, systems that run.
Deadlines are met, promises are kept. Your projects are in safe hands with us.
Fast response times, agile delivery. We get your projects moving quickly.
As equals, transparent, fair. We understand your business and think alongside you.
From strategy to implementation — we guide you through your digital transformation.
Complete ERP, CRM and document management solutions for SMEs.
Design, build and migration of professional IT infrastructures.
Professional management of your IT projects from concept to go-live.
Automate repetitive processes with professional automation platforms.
Protect your infrastructure with professional monitoring and security.
Strategic IT consulting for mid-sized companies.
Traditional IT expertise combined with modern AI tools.
Highly available site connectivity with automatic failover.
Future-proof cryptography for your sensitive data.
Two free quick-checks — no sign-up, no sales call. Instant clarity, right in your browser.
Does the NIS2 directive apply to your company? And if so — what exactly do you need to do? A few questions, a clear answer.
Start NIS2 check → EU AI ActWhich risk class do your AI systems fall into under the EU AI Act? The check classifies them and shows what to watch for.
Start AI Act check →Behind citilan stands Frank Arndt, for more than 20 years, a transformation manager for enterprise networks and IT security — with career stations at the industry’s giants: Nokia, Nokia Siemens Networks and Hewlett Packard.
That is where the expertise took shape that moves the Mittelstand forward today: complex transformations at international scale. A global SASE/SD-WAN transformation for a Tier-1 automotive supplier — SASE before the term even existed. Europe-wide platform solutions for service providers. Sovereign, highly available infrastructure for the public sector. Always with measurable results — from 60% cost reduction to 40% fewer outages.
Since 2021, Frank Arndt has been bringing this experience to where it makes the greatest difference: the German Mittelstand. citilan plans, builds, operates and secures IT — SASE and Zero Trust, SD-WAN, network design, cloud and digital sovereignty. No buzzword bingo, no call-center chain: you talk directly to the person who builds it.
At home internationally. What works for corporations across borders will carry your cross-border business too — whether DACH, Europe or worldwide.
Collaborative. Dependable. As equals.
No call center, no sales team — you talk directly to the person who builds it.
Let’s talk about your project.
Am Asenbühl 3
66424 Homburg, Germany
Monday - Friday: 09:00 - 18:00