ILog

ILOG S.A. was a French software company that specialized in optimization, visualization, and business rules management. Founded in 1987 and headquartered near Paris, ILOG developed a suite of software libraries widely used in enterprise applications. Its product lines included the ILOG CPLEX optimization suite, which provided solvers for linear programming, integer programming, and constraint programming, the ILOG JRules business rules management system, and the ILOG JViews visualization components for Java-based user interfaces.

Throughout the 1990s and 2000s, ILOG expanded its offerings through development and partnerships, earning a reputation for robust software libraries used in areas such as supply chain planning, scheduling, manufacturing, and decision support. The company served a range of industries, including finance, telecommunications, and manufacturing, with tools designed to integrate into large-scale software environments.

In May 2009, IBM announced its intent to acquire ILOG for about $340 million, and the acquisition was completed later that year. The ILOG product lines were integrated into IBM’s software portfolio and marketed as IBM ILOG, continuing to emphasize optimization, business rules, and visualization technologies within IBM’s analytics and enterprise offerings.

Today, the ILOG technologies remain part of IBM’s software ecosystem, contributing to decision optimization, rules-based workflows, and advanced visualization within IBM’s suite of enterprise solutions. The standalone ILOG entity ceased operations following the acquisition, with its products continuing under IBM’s branding and support.