The need to develop a fast and efficient tool to capture and edit animations coincided with the creation of the Anima Mundi Festival, which, since its first edition in 1993, has organized free animation workshops for its audience, in a project called Open Studio. In these workshops, the need for a means of capturing and editing that could preserve the entertaining and fast process involved was evident, since the animations that were produced needed to be watched immediately by the audience.

After the creation of the Anima Escola, a program that includes animation classes and workshops especially designed for school teachers and students, the need for an accessible technology was observed, so that the schools could put what was taught in the project into action.

A partnership was created with IBM, with the goal of creating a free and open-source software. Anima Mundi and IBM decided to bring in yet another partner, IMPA (Institute of Pure and Applied Mathematics), to develop this software based on the demands observed during years of the Anima Mundi Festival and the Anima Escola Project. Both projects served as research and test labs for MUAN, which started to be developed for the Linux platform in 2002. Throughout the years, the software has been improved and new versions have been released. In 2012, versions for Windows and Macintosh were released, meeting the demands of a growing number of users.