SiYuan vs Obsidian
SiYuan is a local-first personal knowledge management system, supporting fine-grained block-level reference, end-to-end encrypted synchronization, and Markdown WYSIWYG.
Obsidian is also a Markdown-based tool for building and navigating personal knowledge bases, featuring excellent note-linking abilities, and a vast directory of community plugins.
Fan of Markdown note-taking apps? 🤔
Maybe Paper is what you're looking for.