The PLaSM project has been initially developed between 1991 and 1995 with grants by the Italian National Research Council, for a total amount of about US$ 370,000, in the framework of the Research Program on Building Technologies ("PF Edilizia").

In the last few years the language development was supported by a grant of US$ 190,000 from the SPIKE industrial consortium, within the SPI/9 National Research Program funded by MIUR, the Italian Agency for Research and University.

PLaSM is Free Software and may be distributed under GNU LGPL