Our Competencies

LieberLieber is the skilled Enterprise Architect (Sparx Systems) specialist with decades of experience in the development of customer-specific models. Our LemonTree and Embedded Engineer extensions make working with models faster and more efficient. We focus on three main areas of expertise:

Model-Based Systems Engineering

Modern electronic systems have to fulfill more and more requirements and therefore often become very complex. For decades, a proven means for reducing this complexity has been the use of models (architecture, mechanical engineering, etc.).

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Modeling Infrastructure

Any company’s established IT infrastructure can be adapted for efficient modeling. It is essential to make the best possible use of existing structures and available data when creating an interactive working environment for modeling teams.

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Integration with Enterprise Architect

Modern IT solutions utilize data originating from many sources. The best and most efficient way to handle this diversity is with a model-based approach. Our years of experience have provided us with the know-how required to connect such data sources to Enterprise Architect in the best possible way.

Profit from the LieberLieber

At LieberLieber, our model-based software and systems development customers receive everything from a single source: consulting, collection of requirements, creation of individual tools, integration into the existing tool chain, tailor-made training and ongoing support. LieberLieber - Models are our world!

  • Everything from a single source
  • More efficiency in your modeling team
  • Integration into your infrastructure
  • Plug & Play products
  • Top training & support


We share our knowledge with you.

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We are tool development specialists.

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We ensure smooth tool interaction.

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Training & Support

We give you advice and support.

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Our Products

Resulting from decades of experience with Enterprise Architect, LemonTree and Embedded Engineer are two plug-and-play products that will make your job much easier, faster, and more streamlined.


Managing different versions of the same model. LemonTree is the Plug & Play model versioning tool (Diff & Merge) that revolutionizes the work of a distributed modeling team and supports compliance with required standards such as ISO 26262. In this way, models get the same lifecycle as other artifacts (such as software). LemonTree provides a meaningful review of changes between individual model versions.

Embedded Engineer

Embedded Engineer combines automated source code generation with model-level debugging. This Plug & Play product offers optimized code generation of ANSI-C code from UML structures, state machines and activity models, as well as the generation of C++ source code. Embedded Engineer also guarantees the traceability of requirements to the code and back again.

About us

Founded as a software development company in 1996, LieberLieber Software has become a single source of competence in model-based engineering focusing on extensions for Enterprise Architect (Sparx Systems) as well as customizations for a wide variety of industrial and application areas.


LieberLieber is actively involved with partners and committees from industry, research and standards organizations. In this way we can be sure that you always get state-of-the-art solutions from us that you can rely on!



LieberLieber and Sparx Systems Central Europe at embedded world 2019

Visit LieberLieber and SparxSystems Central Europe at the joint booth (Hall 4, Booth 141) at embedded world (February 26-28, 2019, Nuremberg).

LieberLieber Software: Replacing documents with models

In a department of a leading German automotive supplier, model-based software development is now being implemented to its fullest. This trend-setting move away from a traditional, document-centered method was only made possible by the use of...

LieberLieber Software: LemonTree for successful Change Management implementation

Functional safety standards such as ISO 26262 also require configuration and change management in models. LemonTree is used for this purpose in the software development of a leading German automotive supplier. The tool’s user-friendly features...

LieberLieber Software: LemonTree 2.0

LieberLieber’s LemonTree is a revolutionary development tool used to combine different model versions, especially popular with developers of safety-critical applications. Its Version 2.0 extends both the features and the license model, all based...

LieberLieber draws on AIT´s safety & security co-engineering

LieberLieber, Austrian specialist in model-based systems development, expands into the Canadian automotive market. Vienna (OTS) - Increasingly complex networking and digitalisation demand new approaches for the efficient development of software...

LieberLieber Software: Volkswagen accelerates with Enterprise Architect

Volkswagen relies on Enterprise Architect along with bespoke LieberLieber modeling assistants to clearly and precisely communicate its requirements on infotainment software and systems development to its suppliers, and can now move ahead with...

LieberLieber Software: HIMA Meets Tough Standards with LemonTree

The global leader in smart industrial security solutions, HIMA has used of Enterprise Architect since 2012. It was during a training course that HIMA became aware of LemonTree and recognized the great potential it holds for the versioning of EA models....

LieberLieber Software: LemonTree for Product Family Engineering

The rapidly-growing automotive supplier Preh Car Connect GmbH is re-establishing its software development on the Product Family Engineering methodology. Preh engineers, already longtime Enterprise Architect users, were recently introduced to LemonTree from...

LieberLieber Software: PiCar as model for Industry 4.0

The team of researchers working on LieberLieber’s collaboration with CDL (Christian Doppler Laboratory of TU Wien) presented its first case study in the form of a mobile robot. The core of development is focused on targeted data reduction that allows the...

LieberLieber Software: Next-generation doors for cats and dogs

Petwalk, the Austrian specialist for automatic dog and cat doors, is on an expansion course. In order to meet the strict safety regulations required for access to the American market, the company sought the support of LieberLieber. Together, they are now...

LieberLieber Software: Hirschmann makes waves with Embedded Engineer

Hirschmann Car Communication is a leading German supplier of transmitter and receiver systems. The company has long based its systems development on Enterprise Architect. Now, in a preliminary project for a remote tuner, LieberLieber Embedded Engineer is...

LieberLieber Software: From Data Streams to Models

After completing its first project with a Christian Doppler Laboratory (CDL) at the end of 2016, LieberLieber is now continuing this commitment. Together they seek ways to transform live data streams directly into models within the framework of industry...

LieberLieber Software: LemonTree 1.3 with optimized performance

Building on healthy demand, LieberLieber LemonTree is now poised to conquer the Japanese market with the support of a key local partner. Meanwhile, the latest Release 1.3 brings even more improvements in speed and stability. LieberLieber’s product...

LieberLieber Software: Coordinator for EUROSTARS project

LieberLieber Software is heading a new European initiative to lower the maintenance costs of highly-available safety-critical software systems. Following smaller precursor projects, a consortium headed by LieberLieber has now started to develop a...

LieberLieber Software + SparxSystems CE: Together at embedded world 2017

LieberLieber Software and SparxSystems Central Europe will be presenting exciting innovations in model-based software development at their joint stand #449 in hall 4 at embedded world 2017. The newest highlights: Enterprise Architect 13 and LieberLieber...

Fresh Model Versioning with LemonTree

After many years of supporting a number of organizations in handling their model versioning challenges, LieberLieber has now released its new model-based versioning tool as a standard solution. LemonTree is a combination of scientific and practical...

Package Solution for International Courier

Recently, LieberLieber was handed the challenge by a global logistics company to develop platform-independent software to support over ten thousand of their employees in the field. The software, continually extended and upgraded, is deployed on special...

New Release: Embedded Engineer 2.0!

LieberLieber Embedded Engineer 2.0 makes embedded software development easy with new features! Generation of C++ source code, the UML Debugger and, totally new, the options of source code synchronisation and requirements tracing. Vienna, ... ..2015 - LieberLieber...

Award for Smart Factories of Industry 4.0 project

LieberLieber's engagement in Industry 4.0 and cooperation with a Christian Doppler laboratory has resulted in an award for Best Paper at the 20th International IEEE Conference in Luxemburg. Vienna, October 6, 2015 – The 20th International IEEE Conference...

LieberLieber one of Top 20 EA Solutions Providers

CIO Revew Magazine has named LieberLieber one of the world's top 20 Enterprise Architecture solutions providers (reprinted from CIO Review): Although no uniform definition of Enterprise Architecture exists, the umbrella term is used to describe how IT...

Realizing Smart Factories of Industry 4.0 with Model-Based Engineering

LieberLieber continues to invest in Industry 4.0 with a recent cooperative venture with the Christian Doppler Laboratory of the Vienna University of Technology. LieberLieber wishes to show what’s already possible with model-based systems engineering....

LieberLieber AUTOSAR Engineer now integrated into EA 12

The profile of the AUTOSAR Engineer developed by LieberLieber in 2014 has now been integrated into Sparx Systems Enterprise Architect, the modeling platform implemented by over 350,000 users. WIEN. LieberLieber AUTOSAR Engineer represents the first-ever...

Cooperation with Lauterbach

Development of a solution for optimizing and debugging embedded software at the model level Vienna/Höhenkirchen-Siegertsbrunn, …… - LieberLieber Software and Lauterbach have joined forces to create a solution for the optimization and debugging of embedded...

Cooperation with PLS on UML test and target access

Complete solution for testing and debugging embedded software on the model level Vienna/Lauta, 25. November, 2014 - In the first week of December, at the Embedded Software Engineering Congress 2014 in Sindelfingen, Germany, LieberLieber Software and PLS...

LieberLieber + Willert = Real-time capable UML code generation

LieberLieber strengthens its partnership with Willert Software Tools to develop a real-time solution for UML code generation Vienna/Bückeburg, November 27th, 2014 - The cooperation that started in 2011 between the two embedded engineering...

Hilti chooses Code Generator

Following exhaustive tests, the renowned construction industry supplier Hilti decided on LieberLieber's Code Generator for Embedded Systems for Enterprise Architect. (Vienna/Kaufering bei München, 10.04.2014) Following exhaustive tests, the renowned...

LieberLieber Software: LemonTree 1.2 optimized for Version Control Systems

Just in time for embedded world 2017: LieberLieber introduces the new version 1.2 of LemonTree, optimized for collaboration with version management systems. This update provides for improvements in performance and the diffing & merging of model...

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via Telephone: +43 662 90600 2017

LieberLieber Software GmbH
Handelskai 340, Top 5
1020 Wien, Austria
+43 662 90600 2017

LieberLieber Software Corp
2800 Post Oak Blvd., Suite 4100
Houston, TX 77056
+1 832-390-2461