Siyuan is a newly introduced personal knowledge management software that emphasizes privacy and self-hosting capabilities. It seems to share similarities with Obsidian, which has prompted discussions on how the two compare in terms of features and usability. Users are expressing appreciation for Siyuan's design and functionality, with some highlighting its cost-effectiveness, likening it to Notion but noting its free offering. The software may attract users who prioritize data privacy and customization through self-hosting.