The FuzzyLite Libraries for Fuzzy Logic Control

By Juan Rada-Vilela, Ph.D.

License Options

The FuzzyLite Libraries, namely fuzzylite 6.0 and jfuzzylite 6.0, are now licensed under the GNU General Public License (GPL) 3.0. You are strongly encouraged to support the development of the FuzzyLite Libraries by purchasing a license of QtFuzzyLite 6.

QtFuzzyLite 6 is the new and (very likely) the best graphical user interface available to easily design and directly operate fuzzy logic controllers in real time. Available for Windows, Mac, and Linux, its goal is to significantly speed up the design of your fuzzy logic controllers, while providing a very useful, functional and beautiful user interface. Please, download it and check it out for free.

Enterprise License $299.99 (NZD) Academic License $149.99 (NZD) Personal License $99.99 (NZD)
The Enterprise License is exclusively for use in private and public organisations. The Academic License is exclusively for use in universities and schools. The Personal License is exclusively for personal use (not for use in private or public organisations, or academia).

Licenses are only sold for QtFuzzyLite 6.0.
For commercial licenses of fuzzylite and jfuzzylite, please contact
Prices are shown in New Zealand Dollars.
Prices are for a Single License that is only valid for a single computer.
After your purchase, you will receive an automatic email with your license.
Each type of license is sold exclusively for its use within the stated domain. Any other use is prohibited.
If you have any doubts about licensing, please contact
If you need more than 10 licenses, please contact for special discounts.

Sources and Binaries

Version 6.0 (Released: 20/03/2017)


Version 5.0 (Released: 08/08/2014)

Version 4.0 (Released: 31/12/2013)

(contains QtFuzzyLite 4 — Community Edition)