GLPI
GLPI gives teams a way to evaluate service desk software fit, deployment tradeoffs, and day-to-day operational usability.
Open source pricing, Cloud / On-prem deployment, Web operating-system support, and a trial path for early validation.
GLPI is easier to justify when the team wants cloud / on-prem, open source, Web, and a visible trial path. It becomes more credible when those conditions match the real environment instead of the idealized one from the demo process.