Note-taking apps differ less in what they store and more in who controls the data.
Knowledge graph for research and notetaking
If you currently rely on Roam Research and want more control over data, lower long-term costs, or a open-source licensing model, Athens Research covers most of the same ground.
Most open-source alternatives require more setup than their commercial counterparts and may lag on polish, mobile apps, or ecosystem integrations. Check the project’s documentation for current feature parity with Roam Research before committing.
This recommendation is indexed from awesome-oss-alternatives. Read their full project notes for the latest changes.