Both tools have similar popularity levels, with AppFlowy having 74,848 stars and Joplin having 55,821 stars on GitHub. In terms of developer contributions, Joplin has 6,207 forks, indicating strong developer engagement.

Both projects show recent activity, with AppFlowy last updated 11 days ago and Joplin 12 hours ago.

Both tools share common technology foundations, being built with JavaScript, Bash, Rust, C, Objective-C, Java, Swift, C++, Kotlin, MATLAB. However, they differ in their additional technology choices: AppFlowy uses Dart while Joplin leverages CSS, Typescript, JSX, Python, SCSS, Ruby.

Joplin has been in development longer, starting 10 years ago, compared to AppFlowy which began 5 years ago. This 4.5-year head start suggests Joplin may have more mature features and established processes.

AppFlowy is licensed under AGPL-3.0, while Joplin's license terms are not publicly specified.

Both tools serve similar use cases in Personal Knowledge Management (PKM). However, they also have distinct specializations: AppFlowy also focuses on Task Management, Collaborative Notes & Wikis while Joplin extends into Note-Taking, Secure & Encrypted Notes.

Both AppFlowy and Joplin offer self-hosting capabilities, giving you full control over your data and infrastructure.