Welcome to LPA

Welcome to Logic Programming Associates (LPA)! We design and build world-class solutions for Artificial Intelligence, including state-of-the-art Prolog compilers, Chimera Agents, the flex expert system and VisiRule graphical business rules.


Check out our special 28-day Free Trial which combines some of our top-selling software, including:

VisiRule Business Rules with flex

Our graphical tool for designing, developing and delivering business rule and decision support applications, simply by drawing a flowchart that represents the flex decision logic.

VisiRule Live Web Demos

VisiRule charts can be deployed as web applications: click on the above link explore a selection of live demos!

Chimera Agents

A powerful Agent Engine, providing an easy-to-use, event-driven model for developing and deploying distributed, networked, intelligent applications.


The undisputed world-class Prolog system for Microsoft Windows, WIN-PROLOG provides the best available programming environment for this established and powerful AI language, complete with dozens of improvements and an all-new floating-point library.

Web design by Solanum
Copyright © 2014 Logic Programming Associates Ltd
All rights reserved