ITSM-NG is open-source IT service management software. It combines a helpdesk that follows ITIL practice with management of IT assets and contracts. A plugin engine lets you add functions such as automatic inventory, extra fields or forms. The project is a fork of GLPI. You install it on your own server (PHP with MariaDB or MySQL), or you can take a SaaS version hosted by the publisher.
ITSM-NG is published by ITSM-NG SAS, a French company founded in 2022 with a team in Rennes. Besides the software it offers services for installation, migration, development and support, as well as SaaS subscriptions and a private cloud for a dedicated instance. The code is on GitHub under the GPL-2.0 licence. When you install it on your own infrastructure, your tickets and asset data stay entirely under your own control. The website does not say where the SaaS version is hosted.