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I would go through those which are not familiar to me and give my list of suggestions. For now:
- ServiceNow, SolarWinds, Ivanti, Atlassian, BMC - for sure
- Freshservice, Easyvista, ManageEngine, TOPDesk, SysAid - probable
- Add more rankings (Forrester, G2, IDC)
- Final Shortlist for research to be decided upon
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