Sankey diagrams that go all the way
to material flow analysis
Build interactive Sankey diagrams in your browser — then, when you need it, reconcile incomplete or inconsistent data with a full MFA engine. Import from Excel, STAN or SankeyMATIC. Free to start, no account needed.
One tool, three levels of depth
Start with a drawing. End with a defensible material balance.
OpenSankey
The free, open-source editor. Draw and style Sankey diagrams, import 3-column data, export images. No account, no watermark.
Start drawing
OpenSankey+
Professional dataviz: hierarchical nodes with drill-down, data tags to switch years/scenarios, views, published interactive diagrams you can embed anywhere.
See pricing
SankeySuite
The MFA engine: data reconciliation under constraints, uncertainty propagation, completion from as little as 10% of measured data. Excel in, balanced flows out.
See pricingComing from another tool?
Your existing work opens directly — no retyping.
From STAN
Open your .smfa files directly. STAN hasn't shipped a release since 2022 —
your models deserve a maintained home.
From SankeyMATIC
Paste your source [value] target text as-is, including colors and layout
settings. Then make it interactive.
From e!Sankey
Browser-based, transparent public pricing, and an actual reconciliation engine — not just balance checks.
OpenSankey vs e!Sankey →Built on real studies, not demos
Fifteen years of cumulated experience mapping agriculture, forestry, waste, biomass and energy flows for public agencies and industry.
Who we are
TerriFlux is a deep-tech worker cooperative (SCOP) spun off from Inria, the French national institute for computer science. Our reconciliation engine comes from peer-reviewed research on territorial metabolism. We work with ADEME, INRAE, IGN and regional agencies — and everything we build ships in the open: the editor is open source.