Best Document Management - Integrated Library Systems (ILS) software in 2026

Evergreen

evergreen-ils.org

Open source

Highly-scalable software for libraries that helps library patrons find library materials, and helps libraries manage, catalog, and circulate those materials.

Koha

koha-community.org

Open source

Enterprise-class ILS with modules for acquisitions, circulation, cataloging, label printing, offline circulation for when Internet access is not available, and much more.

RERO ILS

rero21.ch

Open source

Large-scale ILS that can be run as a service with consortial features, intended primarily for library networks. Includes most standard modules (circulation, acquisitions, cataloging,...) and a web-based public and professional interface.