SankeyMATIC is an online tool dedicated to creating Sankey diagrams, created by Steve Bogart in 2014 and continuously maintained since then. Sankey diagrams are well suited for showing how quantities flow between different stages; examples mentioned in the source include budgets, financial results, application-process stories, ranked-choice elections, and more. It is not a general-purpose design suite, but rather a lightweight web tool focused on visualizing flow relationships.
The tool generates charts from text input in the form of Source, Amount, and Target. It also supports configuring node colors, individual flow colors, and using β[*]β to represent allocation of remaining amounts. The site provides several example starting points, including Start Simple, Financial Results, Job Search Journey, Ranked Election, and Budget, and lets users choose between automatic layout and arranging nodes in input order. For export, the source clearly states that both PNG images and SVG output are generated in the browser, making them suitable for reports, web pages, or further editing in design software. In terms of licensing, published charts do not require mandatory attribution; the code is open source, hosted on GitHub, and depends on D3.js.
SankeyMATIC is explicitly free to use. The site is sustained through Patreon sponsorships and one-time donations via Venmo, Cash App, Apple Pay, and similar channels, with sponsors receiving recognition on the page. Privacy is a clear advantage: by default, all data is processed locally in the browser using JavaScript, and the site does not receive chart data. However, if you create a Public Link, the data becomes visible to anyone with the link, including the maintainer, so sensitive data should not be shared publicly.
Its strengths are that it is free, open source, offers practical export formats, does not require mandatory attribution, and is highly efficient for budget, finance, and process-flow charts. Its limitations are that the source does not indicate support for multi-user collaboration, permission management, enterprise support, or a large template library; text-based input may also feel less intuitive than drag-and-drop tools for users who prefer purely visual design workflows. It is a good fit for data visualization designers, analysts, researchers, content creators, and individual users who need to quickly generate Sankey diagrams.
The crawled content does not provide information about access from mainland China, payment availability, or localization, so its accessibility status is unknown. Payment and donation channels mainly include Patreon, Venmo, Cash App, and Apple Pay, which may not be convenient for Chinese users. Possible alternatives include RAWGraphs, Flourish, Datawrapper, Tableau, Power BI, ECharts, or using D3.js directly.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on sankeymatic.com official site.
sankeymatic.com is an United States Design & Creative provider. TG4G tracks its product information, an overall rating of 8.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach sankeymatic.com directly.