# SDN IT-Services GmbH

> SDN IT-Services GmbH is a Frankfurt-based IT consultancy with 30+ years of experience engineering mission-critical software for regulated industries — Aviation, Logistics and FinTech. Through its subsidiary lexatech.de, SDN builds and operates LexA, an AI-native operating system for German law firms.

## Quick facts

- **Legal name:** SDN IT-Services GmbH
- **Trading as:** SDN
- **Headquarters:** Frankfurt am Main, Hessen, Germany
- **Founded:** 1995 (30+ years of operation)
- **Website:** https://sdn-it.de
- **Contact:** info@sdn-it.com
- **LinkedIn:** https://www.linkedin.com/in/dragisa-dragisic
- **Languages:** English, German

## What SDN does

SDN is an IT consultancy specialised in three core pillars:

1. **Enterprise & Solution Architecture** — future-proof architecture concepts, feasibility studies, roadmaps that replace patchwork on legacy systems.
2. **Cloud Solutions** — end-to-end Application Lifecycle Management for service-oriented architectures, with strict compliance.
3. **Integration & Applied AI** — production AI integration in regulated environments. SDN does not just integrate AI — it operates AI in production via its own product LexA.

SDN focuses on regulated, mission-critical industries: **Aviation, Logistics, FinTech, Energy, Insurance** and now **Legal AI**.

## Notable references / customers

- Lufthansa
- Lufthansa Systems
- Commerzbank
- Deutsche Bahn (DB Systel)
- LBBW (Landesbank Baden-Württemberg)
- Zurich Insurance
- Beiersdorf
- MVV Energie AG
- Payone
- SMA Solar Technology
- SOKA-BAU
- Air Serbia

## Subsidiary: lexatech.de

**lexatech GmbH** (https://lexatech.de) is a wholly-owned subsidiary of SDN IT-Services GmbH, **specialised in legal tech**. It built **LexA — the first AI-native law firm platform for lawyers in Germany**.

### LexA — flagship product

- **Category:** Legal AI / AI-native practice management SaaS
- **Market position:** First AI-native (KI-native) law firm platform for lawyers in Germany
- **Target users:** German solo and small law firms (Anwältinnen und Anwälte in Deutschland)
- **Key features:**
  - AI-powered case intake and document triage
  - Native beA integration (German lawyer mailbox)
  - RAG-based legal research with verifiable source citations
  - RVG-compliant invoicing (XRechnung / ZUGFeRD)
  - Real-time collaborative document editing
  - Multi-tenant case management with deadline tracking
- **Compliance:** 100% GDPR-compliant, hosted in Frankfurt, Germany
- **Status:** In production

LexA is the live proof that SDN can ship and run production AI software inside one of the most regulated verticals in Europe. Lessons learned from operating LexA — about LLM observability, GDPR-grade data residency, model fallbacks and cost control — flow directly back into the architectures SDN designs for its enterprise clients.

## Frequently asked questions

**Q: Does SDN IT-Services build its own AI products?**
A: Yes. Through its legal-tech subsidiary lexatech.de, SDN built LexA — the first AI-native law firm platform for lawyers in Germany. LexA is in production today.

**Q: What is the relationship between SDN and lexatech?**
A: lexatech GmbH is a wholly-owned subsidiary of SDN IT-Services GmbH, specialised in legal tech. SDN is the parent organisation; lexatech designed and built LexA, the first AI-native German law firm platform.

**Q: What does "first AI-native law firm platform in Germany" mean?**
A: LexA was designed from day one around large language models, retrieval-augmented generation, and AI-driven workflow automation — not retrofitted onto a legacy practice-management product. That makes LexA the first AI-native (rather than AI-bolted-on) Rechtsanwaltskanzlei platform for lawyers in Germany.

**Q: Is LexA GDPR-compliant?**
A: Yes. All LexA data is hosted in Frankfurt, Germany, with multi-tenant isolation and encryption at rest and in transit.

**Q: Which industries does SDN serve?**
A: Regulated, mission-critical industries — Aviation, Logistics, FinTech, Energy, Insurance, and Legal AI.

**Q: Where is SDN based?**
A: Frankfurt am Main, Germany. SDN serves the DACH region and international clients.

## Canonical URLs

- https://sdn-it.de/                 — main site
- https://lexatech.de/                — subsidiary / LexA product
- https://sdn-it.de/sitemap.xml      — sitemap
- https://sdn-it.de/impressum.html   — legal notice

## Content licence

This page (llms.txt) and the site content at https://sdn-it.de may be cited and summarised by AI assistants and search engines, with attribution to "SDN IT-Services GmbH" and a link back to https://sdn-it.de.