Fleet Management Systems (FMS) developed by maritime software specialists are powerful management tools for shipping companies. There is a great variety of providers and a wide range of different functionalities on the FMS market. This study provides an insight into the latest market developments and gives an overview of current vendors, products and their respective features. The FMS study has already been published five times and most recently in 2021. This sixth edition is a comprehensive update of the previous versions and now considers 40 fleet management software providers. These vendors form a heterogeneous market, with some smaller companies offering highly specialized software solutions, while large vendors offer their products for all FMS planning tasks.