SiYuan significantly outpaces Zen in community adoption with 45,504 stars compared to 1,129 stars on GitHub. This 40.3x difference suggests SiYuan has a much larger and more active community. In terms of developer contributions, SiYuan has 2,925 forks, indicating strong developer engagement.

SiYuan shows more recent development activity with its last commit 5 hours ago, while Zen was last updated 3 months ago. This suggests SiYuan is being more actively maintained.

Both tools share common technology foundations, being built with JavaScript, CSS, Golang. However, they differ in their additional technology choices: SiYuan uses Bash, Typescript, Python, SCSS while Zen leverages JSX.

SiYuan has been in development longer, starting 6 years ago, compared to Zen which began 1 year ago. This 4.5-year head start suggests SiYuan may have more mature features and established processes.

Both projects use the AGPL-3.0 license, providing identical terms for usage and distribution.

Both tools serve similar use cases in Note-Taking. However, they also have distinct specializations: SiYuan also focuses on Personal Knowledge Management (PKM).

SiYuan provides self-hosting options for complete data control and customization, while Zen may be primarily cloud-based or require different deployment approaches.