This conversion basically represents a standard workflow in Wwise, where you export a project (.wproj) to a finished audio export (.wem). It is highly unlikely that any other program would be capable of this conversion as projects can usually be only exported in the original program.
Convert Wwise project to Wwise Encoded Media audio.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert wproj to wem on Windows
Wwise is professional audio utility used to managing audio processing and a non-linear audio authoring. It is able to create audio asset structures, integrating interactive music elements, defining audio propagation, managing sound integration, and creating sound banks.
Convert from wproj file
to wem file
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.