Chess.com chess engine source code.

I am currently studying chess programming, and I would like to know if the sources codes of the chess.com chess engines are available anywhere. I know that there is currently a wide variety of open source chess engines, and that relatively speaking the chess.com engines are pretty weak but they would still be a very good learning tool since the different levels of strength offer different programming ideas within a similar framework.

If I had to guess, they are just using an open source engine. 

All I know is Chess.com is written in Java, Javascript, & Php

What I know is that Chess.com's engine (Komodo Engine and Stockfish) is written in C++ Which is the analysis board and the way they have found the best move.