A month of Gephi Marketplace


guillaume_old160Computer Science & Engineering Graduate from the Compiègne University of Technology, Guillaume Ceccarelli has been Gephi’s SysAdmin since 2008 and Web Developer since 2012. When he’s not by day working in the financial world, he freelances and stays close to ongoing entrepreneurship ventures.

Four weeks ago, we launched the Gephi Marketplace.

Haven’t taken a look yet? Didn’t know it existed? Take a few minutes to check it out now! It’s right here, waiting for you.

Why the Gephi marketplace?

For a long time, we felt like we lacked a central point of access when it came to what everyone was doing to improve or build upon Gephi. On one hand, our forums allowed for discussions to happen but they didn’t really enable anyone to share their work easily or to find out about one another. On the other hand, the wiki as well as our main site, served more as official portals to spread the word or to explore knowledge around Gephi, but they didn’t seem like a good fit to showcase the work our community was doing.

A little while ago, we decided to fix that.

The spirit behind the marketplace is simple. When we started, our idea was:

  1. To provide Gephi users with easy means to find and learn more about what the community was building for and around Gephi
  2. To give creators and people working with Gephi a way to publish their work and make them known to the entire community, without the overhead of a complex and lengthy process

This meant creating the central point for Gephi Plugins and what we call Gephi Services, which eventually became the Gephi Marketplace.

Before the marketplace existed, plugins were submitted and downloaded through the old plugin center, which required authors and the Gephi staff to go through a tedious process, creating a lot of work and unnecessary frustration for everyone. In addition, the system didn’t allow authors to update their own plugin pages, or to submit a different plugin for different versions of the Gephi application, a feature which was long requested before we finally became in a position to deliver it to you.

A new world of plugins

Now, every plugin download, even from the Gephi Application itself go through the marketplace! It means that as soon as a plugin goes live on our new platform, it’s directly available to every Gephi user around the world. Even if you haven’t made a plugin yourself, chances are you’ve already used the marketplace without realizing it!

Speaking of around the world, here’s a geographic breakdown of Gephi plugin downloads within the past 30 days:


Isn’t it impressive? 1169 plugin downloads and every continent is represented! (ok, not every single one. Props to the first Gephi user who’ll download a plugin from Antartica!)

It makes us extremely proud to help and foster such a vibrant community of Gephi users around the world. Remember that this map is for the last 30 days alone!

Today, we have 38 plugins listed on the marketplace, and we’ve made sure you can post your creations as easily as possible. It takes no more than 5 minutes to first fill in the plugin upload form, and we usually get back to you within 24 hours, so you can make your work available to thousands in record time!

A world of services

As briefly mentioned before, we’re also listing Gephi Services on the marketplace.

Over the years, we’ve noticed that a community of professionals and enthusiasts started providing services to the community. We’ve seen people doing trainings on Gephi, others integrating Gephi into data analysis workflows, or even create studies using Gephi as their tool of choice. We thought it was about time these fine folks got easier to find!

Every service provided by the community, for free or with a fee, is welcome to be listed. We already have a few, and to be honest we would love to see more of them!

Listing the services you provide on the Gephi marketplace is easy, and like with listing plugins it’s completely free, regardless of what you choose to charge for your work. We’re not here to collect fees. We just want to help other people know about your work, and to help you easily be found and easily be reached.

Following the same simple form submission process you can use for plugins, you give us all the info on what you’ve got for the community, you click ‘upload’, we get back to you, and then you have yourself a listing!… Which you can then customize to your liking, and for which you can include every single bit of information you want, and even a great copy! So not only can you let everyone know about what it is that you do, but also how truly wonderful it is to work with you and your expertise. So?

And now back to you.

Any question? Feel free to comment below! We’ll be glad to help you get started. And if you’d like to be kept in the know of what’s newly getting posted on the Marketplace, the RSS feed is this way.

In the meantime, thank you for your continued trust and your use of Gephi as your Graph Exploration and Manipulation tool of choice! It is our humble pleasure to serve you all.

See you soon on the marketplace! 🙂

New Tutorial: Visualization in Gephi

A new tutorial is available about Visualization in Gephi. It will guide you to the basic and advanced visualization settings in Gephi and introduce selection, interaction and tools.

Gephi has a powerful and customizable visualization engine but sometimes capabilities are not obvious and the richness of some features remains hidden. For instance text drawing is essential for visualization efficiency and needs to me controlled in the best way, in particular for large graphs.

This tutorial explains also in details some of the important tools, including:

  • Shortest Path
  • Heatmap
  • Edit

Book store: Theory & Practice

Gephi has now its own book store!

It’s a great place for those who want to discover the key theories beyond networks. It has also an “Information Visualization” and “Programming” section for those who want to master the subject and join the Gephi team. All these books give valuable information for understanding what is guiding the people who are developing Gephi and how concepts were put in practice.

The Network Science section refers to the science beyond networks. It describes where networks are in nature, society or organizations and helps understand their properties and patterns. Newcomers can starts with Linked by Albert-Laslo Barabasi, the major reference, from 2001. You can also directly jump to Bursts, Barabasi’s new book released few days ago.

Social network theory views a network as actors who are connected by a set of relationships and is referenced as Social Network Analysis (SNA). As people increasingly use social networking websites (e.g. Facebook, YouTube, LinkedIn etc.), Social Network Analysis brings tools to study patterns of communication and communities. Social Network Analysis by Wasserman & Faust is a major reference.

These books are for all audience, so researchers would find a clear state of the art of the domain with The Structure and Dynamics of Networks or Dynamical Processes of on Complex Networks.


Data Visualization and Human Computer interaction (HCI) are at the base of Gephi. Learn about how visualization and interaction enhance understanding and knowledge discovery of complex data. Information Visualization or Visual Analytics make reference to this domain as well.

One can easily find the roots of the Visual Analytics in the book Readings in Information Visualization: Using Vision to Think by Stuart Card, Jock Mackinlayis and Ben Shneiderman. Exploratory Data Analysis started with John Tukey, and has recently been extended by Andrienko.

The last stone is added with the knowledge of efficient programming, in particular how to design a modular software based on services with Practical API Design: Confessions of a Java Framework Architect. And as the human factor is central, take a look at The Mythical Man-Month: Essays on Software Engineering. Mathieu is a great fan 😉


Also we foster you to go beyond with more references at the Reader’s circle and of course send us book suggestion.

Try Gephi 0.7

Before any further announcement about the new 0.7 version, welcome to new Gephi website, an outstanding improvement for the community. The new version 0.7alpha has been uploaded on our server today at midnight. You can download it and start playing with it now.

We would be grateful if you could send us as many feedbacks as possible, about features, bugs and usability.

To start spread Gephi, you can already visit this page. However more materials will come soon, like a feature-madness video and more screenshots.

Follow us on twitter

gexf.net, a new website for gexf graph format, libgexf and gexfExplorer

It’s been a while we didn’t give you some fresh news, but hopefully this fall will see great surprises for the community! First of them today, we just published a website solely dedicated to the GEXF file format and applications : http://gexf.net

You will find :

  • clear GEXF specifications, examples and primer.
  • libgexf, the official C++ toolkit for GEXF.
  • gexfExplorer, a brand new open source Flash application created by Alexis Jacomy to visualize networks encoded in GEXF, directly in a web browser.

This website concentrates all the useful links to communicate and staying involved in these projects. They are now independent from Gephi itself, and take part of a bigger Gephi Community project.

[nggallery id=4]

Import graph files

application_x_lhaThis article discusses graph file format and introduce a new support page about graph import, which explain a bit of each format and gives tips about current Importer’s specificities.

Gephi supports major graph file format and GEXF, which is our own creation. These file format come from different editors and therefore none is really a standard. Needless to say Gephi supports them for enable previous work to be imported but it is not always easy, due to differences between them. Some standardization efforts exist but they are difficult to apply anyway, due to very different features within graph editors, for instance mixed diagrams and graphs editors.

Our approach when building the GEXF format is slightly different. Instead being specific to our software focus is made on what may be common to all network editors. In addition it will be the first standard dynamic, yet easy format. You can follow the process of specification and see some samples on this page. It recently reached a 1.1 version.

Gephi’s domain of application are networks only, this tends to clarify which data shall be imported. Although these (old) formats can have sometimes complicated functionalities, only few are essential to import a graph structure in Gephi, in sum topology and attributes.

See below current and future status about file import. Note that graph file format export is so far not a priority, as long as we have GEXF export, but we may perhaps consider it more in the future. Note that as PDF is not a graph format, export feature is set at high priority for 0.7.

Import Implementation status (Gephi 0.6 beta2)

* GEXF Implement GEXF 1.0 Specification.
* GDF Implemented, but some rare bugs remains.
* GraphML Support basic node, edge and attribute. Don’t currently support hierarchy but planned for 0.7.
* Pajek Implemented, works fine.
* XGMML As for GraphML, hierarchy is not yet supported.

More details and compare on Supported Graph Formats.


* GML Needs to be done, planned for 0.7 version.
* Excel/CSV We are thinking how to do this.
* Database In the 2009 roadmap.

Demo data set

Sample data set are now available from the Demo page. You can download them and import these files either in the demo version or in releases. You can use these data to discover Gephi capabilities or observe an example of the GEXF file format.

We put three small examples, two of them are classical case study, and the third is the network of the French IPR study. More will be added in the future. By the way, if you built nice maps with Gephi send them to us and we will put them in the exhibition section.

The brain network of the
C. Elegans worm
Semantic graphs of
French IPR
Protein-Protein interaction