A web application for the visualization of label-free mass spectrometric data. msVolcano is optimized for the output of the MaxQuant data analysis pipeline of interactomics experiments and generates volcano plots with lists of interacting proteins. The user can optimize the cutoff values dynamically to find meaningful significant interactors for the tagged protein of interest. Optionally, stoichiometries of interacting proteins can be calculated. With its ftp file input support, user can quickly analyse and re-analyse the results of the interactomics experiment present on their own personal and cloud servers and along with the calculated optional stoichiometries, all the results can be exported in publication quality tabular or graphical format.