Diff & Merge

3-way diffing and merging of Enterprise Architect models

Model versioning

Parallel editing of models through optimistic model versioning


 Seamless integration with Subversion and Git

Branches of models

Branches of models (longer-term, parallel development of versions and variants)

Merge- Preview

Diagram merge and merge preview



Changes are visualized clearly and understandably for review (including preview)

LemonTree 30-Day Trial Version

Would you like to try out LemonTree today? Download the latest version here:

LemonTree Help

Do you need help with LemonTree? Visit our LemonTree Help-Site


“LieberLieber’s approach is very pragmatic: You can continue to use existing software and still switch to a model-based approach when it makes sense. This makes it much easier for us to decide on the fly whether or not to take this step. This also allow us to intensify our cooperation with LieberLieber on an ongoing basis, trying out new things over and over again.”

Klaus Kindl

Founder and CEO at Petwalk Solutions, Petwalk Solutions

“Product line development means a great change for us in the company. The support of suitable tools such as LemonTree is an important aspect here. Among other things, the product helps us to track changes in the project models better and more accurately.”

Dipl.-Informatiker Tim Michaelis

Software architect at Preh Car Connect, Preh Car Connect

“In general, standards such as IEC 61508 demand the application of configuration management. This refers to all artifacts, including UML models. LemonTree from LieberLieber is our key to revealing the changes that have been made to a revision.”

Dipl.-Ing. (FH) Stefan Müller

HIMA Paul Hildebrandt GmbH


You’ll recognize some of the organizations already benefiting from Fresh Model Versioning:


Daniel Siegl

Daniel Siegl



Dr. Konrad Wieland

Dr. Konrad Wieland

Product Manager


Roman Bretz

Roman Bretz



Philipp Kalenda

Philipp Kalenda










Extensions & Adaptations

So that you can incorporate LemonTree into your day-to-day work in the best possible way, we’ll configure the tool according to your requirements and, if necessary, even extend its range of functionalities. Regardless of which language you do your modeling in (UML, SysML, BPMN, etc.) or if you would like you have additional features in the GUI, we are able to create the right solution for you. By the way, LemonTree can diff & merge models from Enterprise Architect as well as from other modeling tools.

Support & Maintenance

Our Support Team is ready to help your work with LemonTree progress as comfortably as possible. We also have training specialists with years of project knowledge standing by to ensure you receive the greatest benefit possible when using your system, and we’ll incorporate your experience gained from using LemonTree to continually improve its functionality and effectiveness. Don’t hesitate to contact us – we’ll find the right solution for you!



LemonTree can be seamlessly integrated with existing versioning systems (Subervsion, Git or PTC), allowing the centralized, automated management of model versions. This also enables parallel editing of models within a team environment, the standard approach with source code for years. In such case, LemonTree is addressed as a 3rd-party Diff & Merge tool as soon as a model is checked into the central repository.


Would you like to try LemonTree today? Request the trial version or Web demo!
Our experts at LieberLieber would like to support you.

LieberLieber Software

Handelskai 340, 1020 Vienna, Austria