LieberLieber: Your Enterprise Architect specialist

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

With us, customers get everything they need for model-based software and system development from a single source: in-depth consulting, careful assessment of requirements, creation of individual tools, integration into the existing tool chain, customized training and ongoing support.

  • 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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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!



eXplore LieberLieber

eXplore LieberLieberDo you want to quickly find the information you are looking for on the LieberLieber homepage? Then we have the right tool for you: eXplore LieberLieber eXplore LieberLieber is a navigation tool with which you can quickly find the content relevant...

LieberLieber: New Release – LemonTree 4.0

With version 4.0, the LemonTree family now has a completely new user interface as well as innovations for web-based reviews and continuous integration. The new user interface has been optimised for user friendliness and feedback and offers a 4K resolution for even...

LieberLieber Software: Internships in high demand

This year LieberLieber invited nine trainees for an introduction to the basics of model-based development. The work on concrete projects enthused the young participants for the highly specialised field. The interest in an internship at LieberLieber was so great this...

LieberLieber: Festo uses LemonTree.Connect

With more than 20,000 employees, Festo serves about 300,000 industrial customers in 176 countries. In the "Embedded Software Platform" project, LemonTree.Connect codeBeamer has recently been used in addition to Enterprise Architect and LemonTree. This bridges the gap...

LieberLieber: Modelling brings more safety

The EU research project VALU3S aims to reduce the development effort of automated systems with regard to safety, cyber security and data protection requirements (Safety & Security). For this purpose, 41 partners from 10 countries worked closely together over the...

LieberLieber: How to automatically deploy models at scale

The Enterprise Architect Global Summit 2023 will take place online on 11 and 12 September 2023 and will feature presentations and discussions on a variety of topics related to Enterprise Architect, Prolaborate and LemonTree. Daniel Siegl will be giving a talk on "How...

LieberLieber: SysML v2 beta – next generation system modelling

Shortly after Ed Seidewitz introduced SysML version 2 in his keynote at the 2nd MBSE Summit in Traunkirchen, the beta specifications were approved by the Object Management Group (OMG) on 10 July and explained in a press release. The specifications enable...

2nd MBSE Summit was a great success

The 2nd MBSE Summit organised by LieberLieber Software together with the Johannes Kepler University Linz (CDL-MINT) at the International Academy Traunkirchen am Traunsee (June 5-6, 2023) was a great success with more than 80 participants and brought the MBSE community...

Presentation at Mesconf 2023

Philipp Kalenda presented a comprehensive scenario at Mesconf in his one-hour talk "Requirements & Architecture: Managing Traces in a model-based Build Pipeline" including the recently introduced LemonTree family (see graphic). The interest was very high and there...

LieberLieber Software: LemonTree becomes family

LieberLieber launched its product LemonTree more than six years ago. As the demand expanded more and more, LemonTree has become a product family in the meantime. An important part of this is the LemonTree.Connect product group, which connects various ALM systems with...

LieberLieber Software: Whitepaper LemonTree.Automation

How to successfully work with LemonTree.Components and LemonTree.Automation in a build pipeline using version control This white paper describes how to integrate LemonTree.Components and LemonTree.Automation into a DevOps process to efficiently manage the lifecycle of...

2. MBSE Summit in Traunkirchen, 5. – 6. June 2023

After last year's great success, LieberLieber is organising the MBSE Summit for the second time from 5 - 6 June 2023. The venue will again be the "Internationale Akademie Traunkirchen" (Traunsee/Upper Austria), which has proven to be a great place for in-depth...

MedConf 2023: Our offer for medical technology

The MedConf - Software and Device Development in Medical Technology will take place from 23 - 25 May 2023 in Munich Unterhaching as an attendance event. LieberLieber and SparxSystems CE are exhibitors and speakers for the first time at this conference, which has...

WEBINAR AUTOSAR-UML Bridge by IncQuery for Maximizing System Design Efficiency

LieberLieber and IncQuery have a long-standing partnership around model-based development with Enterprise Architect and LemonTree. This collaboration has now resulted in the AUTOSAR-UML Bridge by IncQuery, a powerful solution for bridging the gap between AUTOSAR and...

Visit to NASA’s JPL

Alex Schölzhorn and Daniel Siegl recently visited our customer, NASA's JPL laboratory in Pasadena, California. The Jet Propulsion Laboratory (JPL) controls and builds satellites and space probes for NASA. It is part of the California Institute of Technology (Caltech)...

LieberLieber: Webasto moves into the future with MBSE

The Webasto Group, a family-owned German automotive supplier, generated 3.7 billion euros in sales in 2021 with around 15,700 employees, making it one of the 100 largest suppliers worldwide. The group has been implementing MBSE for about two years and relies on...

Webinar: Polarion Connector for Enterprise Architect

LieberLieber Software and Siemens present their Polarion ALM - Enterprise Architect integration. This state-of-the-art integration is based on the latest technology and brings important updates for users of both systems.  Siemens, developer of the market-leading...

LieberLieber Software: Cooperation with ACTL Systems in Israel

LieberLieber has recently started a cooperation in Israel with ACTL Systems, one of the leading Israeli companies in the field of software development methodology. The team, which currently consists of seven people, specializes in consulting and training in the field...

LieberLieber Software: DevOps for MBSE at Bosch

At the Prostep ivip Symposium 2022, Florian Beer (Bosch, Engineering Driving Systems) and Daniel Siegl presented their joint project to realise DevOps for MBSE at Bosch Driving Systems. In the presentation, they showed how such a DevOps solution for models can be...

LieberLieber: Agriculture is going digital

In 2021, the German agricultural engineering family group CLAAS generated sales of 4.8 billion euros with around 11,900 employees. Within the group, CLAAS E-Systems is responsible for the development of electrical and electronic systems for agricultural machinery....

LieberLieber Software: Facilitating SysML data exchange

If Model-Based Systems Engineering (MBSE) is to become widely accepted in industry, the free exchange of MBSE data (language: SysML) between different tools must function smoothly. Therefore, LieberLieber is actively working on this task both in Prostep ivip and...

LieberLieber Software: Cooperation with msg Plaut

LieberLieber has recently started a cooperation with msg Plaut, a group of companies with headquarter in Vienna. The cooperation is focused on modelling with Enterprise Architect in the automotive sector, as the demand for model-based solutions continues to grow...

LieberLieber Software: LemonTree 3.3

Simultaneously with the release of Enterprise Architect 16, LieberLieber presents LemonTree 3.3 to ensure full compatibility with the widely used modelling platform. In addition, LemonTree.Automation, a special solution for use in a tool chain, is now available....

LieberLieber Software: 1st MBSE Summit 2022 at Traunkirchen in Upper Austria

Together with the Johannes Kepler University Linz (CDL-MINT), LieberLieber is organising the 1st MBSE Summit at the International Academy Traunkirchen on 23 and 24 June 2022. The aim is to bring together the German-speaking community in the field of Model-Based...

Webinar: SysML-Light with Enterprise Architect (German)

7.3.2022, 13:00 – free participation
The ballast-free and practical introduction to Model-Based Systems Engineering
Many organisations find it difficult to get started with MBSE using SysML. Among other things, they are faced with the challenge of having to decide how to tailor the general modelling language SysML with its 9 diagram types and many model elements to the project-specific needs. After all, not all diagram types and model elements should be used.

Webinar Agile MBSE: Thursday 10.3.2022, 14:00 – 14:45, LieberLieber Software + Nanga Systems

A constantly and ever faster changing world requires new working methods and tools in Systems Engineering. For this reason, there has been a shift towards Model Based System Engineering (MBSE) for quite some time. However, especially in agile settings, there are many detailed issues to be resolved in the development process to meet the required traceability and other conditions.

Whitepaper: Is suitable versioning possible at all?

In our everyday practice of model-based systems engineering in various branches of industry, we repeatedly encounter the question of precise and easy-to-handle versioning of models. This question is becoming increasingly important due to legal regulations, stricter safety regulations and the significant increase in product variants.

LemonTree as a Swiss pocket knife for models

For about 20 years, the volunteer team of the open source project railML has been working on the standardisation and simplification of data exchange in the railway sector. In 2022, the work carried out is to be officially recognised and thus become binding by being recorded as ISO/TS 4398:2022 „RailDax“. The team has been using Enterprise Architect for several years, and recently also LemonTree, which is already referred to there as the Swiss pocket knife for models.

Continuous Integration with Enterprise Architect

In the course of the increasingly agile orientation in software development, our customers ask us again and again whether modelling and agility go well together. Our opinion on this is quite clear and has also been proven in various studies: Only with properly applied modelling can agile processes be implemented at all in the face of increasing complexity, if you also want to document all regulations and requirements in a comprehensible way.

LieberLieber Software: Partnership with Technowelle

The German startup Technowelle is a new partner of LieberLieber and will further develop Autosar Engineer, which was introduced in 2014, under the name Modsar. Technowelle’s goal is to support customers in creating innovative concepts for the development of UML architectures and AI projects.

LieberLieber LIVE

LieberLieber Software is a specialist for model-based software and system development and regularly presents itself at various events. Our event calendar will help you to plan your meeting with us well in advance. So pick your preferred date and visit us right away. We are looking forward to meeting you!

Enterprise Architect Global Summit 2023




Incose Michigan


Polarion Days


Nanga Days



15.-17.11.2023 Würzburg

Contact LieberLieber!

by phone under +43 662 90 600 2017 

Contact us today

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