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Many of you have asked if I could name some software tools that can be used for drawing Sankey diagrams. So I am compiling a list of programs I have tested, or came across during my research. By no means do I wish to endorse any of these products, however, I do have a favorite, as some of the readers of this blog might have observed already.

I am grouping the list in (1) softwares that are specifically designed to make Sankey diagrams, (2) tools that support one specific type of Sankey or Sankey-style diagrams (this section also includes Matlab routines and open source), (3) software that are not available any more, and (4) other programs that do have Sankey as one of their features, but the main purpose for using the software is different. Time permitting I will do individual pages for the tools, and include my test notes and screenshots. The lists are sorted alphabetically.

This is a simple list. No warranty taken whatsoever for the software tools listed here. Download and install at your own risk. Contact the individual software makers for support, not me, please!

Please note: This list is to be understood as non-exhaustive! Do you know of any Sankey diagram software not listed here? Let me know

Full Sankey Desktop Software Tools

e!Sankey 5 (website)
First released in November 2006, latest update version November 2019, a tool by German software firm ifu Hamburg. Version ‘pro’ with Excel interface. This is one of the tools I use for my work, see sample diagrams on this blog. License costs 240 €/480 € (pro). Free trial version.
S.DRAW 5.x (website)
S.DRAW, originally developed by Austrian company STENUM is now being handled by Altenburger Consulting & Software in the US. A single license is 485 US$/405 €. Comes with a hardlock key (dongle). Update December 2010. A demo version is available.
Sankey Editor 2011 (website offline)
A Sankey drawing software by an Austrian company named Stenum. First released in 2005 by LogSim (their website seems dead: website). Single license is 149 €. Demo version available.
Sankey Helper 2.4 (website)
A freeware tool by Gabor Doka from Switzerland that allows to draw simple Sankey diagrams in Excel. It was one of the first software for Sankey diagrams available. Last updated in January 2010.

Web-based, mostly building on open-source d3.js

eco-data.fr (webpage)
eco-data.fr offers different types of online visualization tools, among which there is also a Sankey diagram. Based apparently on d3.js and the Sankey library the diagrams are built by defining nodes (‘noeuds’) and links (‘liens’). Dragging nodes horizontally or vertically keeps the arrows attached to the nodes. Your Sankey diagrams can be saved and reopened for modification. Enter values manually or loaded from a csv file.
Excel to Sankey (blog)
Developed by Bruce McPherson based on work done by Mike Bostock this code uses d3.js to create left-to-right distribution diagrams over several categories/columns. An interactive version can be created that allows dragging the nodes within the columns.
Google Charts / Sankey (webpage)
The Google Charts available on the Google Developers page now include Sankey diagrams. Again, nodes and links to show a “many-to-many mapping” between two categories or multiple paths through a set of stages. Color options for nodes and bands.
Sankey Builder (Blog)
Sankey Builder is another online tool for distribution diagrams built originally on d3.js. New features were added in January 2016. A free version is available, pricing scheme for commercial users available at 20 US$ and 30 US$.
Sankey Flow Show (webpage)
A web-based Sankey diagram tool by Thortec Software in Germany. Straight-forward drawing of diagrams. Many layout options, e.g. node types, arrow curves, arrow shadow. Diagrams can be stored locally or in cloud drive. Free trial/student account, pro account at 3.99 US$/month.
SankeyMATIC (webpage)
An online tool by Steve Bogart. Users can enter their value sets in a list box, diagram will create automatically. Based on open source d3.js and its Sankey library.
Wikibudgets Sankey Web App (Website)
A free web app focused on financial flows (budget, transfers) by wikibudgets.org. A novel approach for setting up the diagram since you hand pick the element shapes and just plug them together in the browser window.

One specific type of Sankey-style diagrams, e.g. alluvial

iOS Sankey Diagram App (website)
The first Sankey app for iOS, by SquishLogic LLC. Optimized for the iPad. Handles different diagrams, move nodes with gestures, set arrow colors. Left-to-right orientation of diagrams. Export as PNG or PDF. Connects to mail, Twitter, Facebook. Available for $9.99 at iTunes.
ParSets V2.1 (blog)
A project by Robert Kosara, featured on eagereyes. Freeware for Mac, Windows and Linux. Can do top-down oriented bands, hooked to nodes (categories). Data can be imported from CSV file. Similar to Fineo.

For the geeks (Javascript, Python, R, Mathlab)

drawSankey (Code available at Matlab Central.)
Developed by James Spelling and Germain Augsburger at EPFL in Lausanne. DrawSankey.m draws simple Sankey diagrams in Matlab (input, losses, output).
jstepien’s Sankey (link broken)
A very basic online tool to draw simple left-to-right b/w Sankey diagrams. You can enter a number of named nodes and define the edges with quantities. Didn’t get it to work, but you can see an example here.
Sankey (Sankey @ github)
A Mathematica workbook by Sam Calisch that can be used to draw left-to-right distribution diagrams with several nodes ordered in columns. An example of the output can be seen here.
Sankey Diagrams in Python (matplotlib @ Sourceforge)
‘matplotlib’ is an open source project. Now has functionality to draw left-to-right oriented Sankey diagrams. Features available are labeling of flows, formatting of colors, fonts, borders, etc.
Sankey by tamc (tamc/Sankey @ github)
Commenter Colm O’G suggested this javascript library for drawing sankey / flow diagrams in a browser to be added to the list, thanks. This seems to have been inspired by Fineo. An online implementation example can be seen on Andy Tow’s Atlas Electoral here.
SankeyR (blog post)

Free Sankey Diagram Software Mac