Dimension scores are derived from public data and fields; weighted into the composite. Reference only.
SankeyMATIC is an online Sankey diagram maker created and continuously maintained by Steve Bogart since 2014. Its core purpose is to visualize quantitative flows between different stages. Typical use cases mentioned on the site include budgets, financial results, application process stories, multi-round elections, and similar scenarios. It is a specialized tool for data visualization and information design, rather than a general-purpose graphic design platform.
The tool focuses on helping users “Make beautiful flow diagrams.” You can create Sankey diagrams directly in the browser and export them as PNG images or SVG files. SVG output is especially useful for further editing in design software, embedding on websites, or use in publishing workflows. On privacy, the site states that all data processing is handled locally in the browser via JavaScript, including image and SVG generation. Chart data is only visible to link holders and the site maintainer when a Public Link is created. Attribution is not required when publishing diagrams, although mentioning “Diagram created using SankeyMATIC” is welcomed. The code is open source, the repository is public, and the tool relies on D3.js.
SankeyMATIC is explicitly free to use. Maintenance costs are mainly covered through Patreon sponsorships and one-time donations via Venmo, Cash App, Apple Pay, and similar channels. Collaboration features are limited: the site only mentions Public Link sharing, and there is no visible information about team workspaces, permission management, comments, multi-user editing, or version control.
Its strengths are that it is free, lightweight, privacy-friendly, offers practical export formats, and does not require attribution, making it suitable for quickly creating publication-ready Sankey diagrams. Its open-source nature also improves transparency. The limitations are that its scope is fairly narrow and mainly focused on Sankey diagrams; the size of its asset library and the number of templates are not disclosed; and support is mainly available via Mastodon or email, which falls short of enterprise-level service guarantees. Public Link sharing is convenient, but it is not suitable for sensitive data.
SankeyMATIC is suitable for users who need to present “flows” and “changes in proportions,” such as financial analysts, media graphics teams, researchers, product teams, and anyone explaining resource allocation or process flows. The site does not disclose its accessibility from China, so actual testing is required. On the payment side, Patreon, Venmo, Cash App, and Apple Pay may not be fully convenient for mainland Chinese users. If access or payment becomes an issue, alternatives such as RAWGraphs, Flourish, Datawrapper, ECharts, Tableau, or Power BI may be worth considering.
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