Note that the clients being FOSS is of little relevance because all they do is forward a recording to a blackbox proprietary service run by a for-profit company.
The code that has access to your audio and does the actual task at hand is not FOSS in the slightest.
Audire
Audile
Found these two apps here: Open Source Everything
Note that the clients being FOSS is of little relevance because all they do is forward a recording to a blackbox proprietary service run by a for-profit company.
The code that has access to your audio and does the actual task at hand is not FOSS in the slightest.