In Swedish companies, several digital tools and platforms are used to support Enterprise Architecture (EA), where Sparx EA, LeanIX, and Ardoq are among the most popular. Sparx EA is known for its powerful modeling capabilities and is often used to document and analyze complex systems landscapes. LeanIX offers cloud-based management of application portfolios and is particularly useful for visualizing dependencies and supporting cloud strategies. Ardoq is a modern tool with a focus on visualization and collaboration, which suits the needs of Swedish organizations for transparency and cross-functional work. These tools support open standards such as ArchiMate and UML, which facilitates integration with other systems and tools. For a Chief of Staff, this means choosing tools based on the size, complexity, and collaboration needs of the organization, thereby streamlining and ensuring the quality of EA work.