Peerscape is an experimental peer-to-peer social network implemented as an extension to the Firefox web browser. It implements a kind of serverless read-write web supporting third-party AJAX application development.

Under the hood, your computer stores copies of your data, the data of your friends and the groups you have joined, and some data about, e.g., friends of friends. It also caches copies of other data that you navigate to. Computers that store the same data establish connections among themselves to keep it in sync.

It's all about managing information instead of servers. Peerscape uses public-key cryptographic signatures to encode the relationships among people, groups, and their content.

Peerscape is open source software available under the MIT License.

Getting Started

Go to Installation for information about obtaining and installing the software.

Then proceed to the instructions for getting started with the web interface.


This software was developed at Helsinki Institute for Information Technology and is one of the results of the P2P-Fusion project co-funded by the European Union through the IST programme under FP6.

Recent News

  • Stable 3.1 Release. It's time for us to take a deep breath and think a little about what to do next.  The browser status bar now tells you if you have pending ...
    Posted Jun 17, 2009, 11:42 AM by Ken Rimey
  • The Peerscape Firefox extension now includes the Python code. As of 3.1b1, there is no longer a Peerscape application that you have to run separately from Firefox.  However, you do need to install a second extension, called PythonExt ...
    Posted May 21, 2009, 11:23 AM by Ken Rimey
  • FIrst alpha release of Peerscape 3.1. This is the first release that we are advertising outside of our research community.  Go to Downloads to get it, and then see the installation instructions.
    Posted May 13, 2009, 7:41 AM by Ken Rimey
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