In modern IT Service Management, teams rely on frameworks that provide the appropriate processes and tools to define, set up, deliver, and continuously optimize their services. ITIL is the most popular approach in this context, virtually establishing itself as the standard in ITSM. However, several other frameworks aim to equip ITSM teams with systematic practices and processes. In this article, wee will comprehensively present four of them here and include the main differences to ITIL.