LiquidFeedback is an open-source software, powering internet platforms for proposition development and decision making.

LiquidFeedback is an independent open source project published under MIT license by the Public Software Group of Berlin, Germany. The developers of LiquidFeedback have joined together in the Interaktive Demokratie association to promote the use of electronic media for democratic processes.

For general information about the software, visit

Technical information and download below.

Current version: LiquidFeedback 4

  • Core v4.2.2
  • Frontend v4.0.0 (use with WebMCP 2.2.1 and Moonbridge 1.1.3)


The implementation of LiquidFeedback splits into two parts:

Installation instructions

The LiquidFeedback Frontend contains an installation guide (file install.html).