The software was called Automated Library Expandable Program or ALEPH-100 ("Aleph" is also the name of the first letter of many Semitic alphabets).

[5] In July 1997, Ex Libris acquired Dabis, a leading vendor of automated library systems in the German speaking countries.

[7] In February 2000, Ex Libris acquired the rights to SFX, an OpenURL link server software, from the University of Ghent.

[11] In August 2002, Ex Libris launched DigiTool, a full function, digital asset management system designed for libraries and information centers.

[14] In November of that year, Endeavor, the developer of the Voyager integrated library system, was merged into Ex Libris.

[19] In January 2011, in collaboration with four development partners, the company released the Ex Libris Alma library management system, the first SaaS cloud-based library services platform, representing the company's shift from an on-premise to a SaaS technology provider.

[21] Ex Libris acquired oMbiel and its product campusM, a mobile campus platform, in April 2015, marking the company's expansion to educational technology outside libraries.

[22] Leganto, the company's reading list management application, built on the Alma cloud platform, was launched in 2015, and was Ex Libris' entry into the teaching and learning domain.

[25][19] It was announced at that time that Ex Libris would also manage the products of the Workflow Solutions division of ProQuest,[26] such as Intota, Summon, and 360 Link.