I wonder how mozilla deepspeech compares https://github.com/mozilla/DeepSpeech I'm sure it is not better than Google, but it seems to do fairly well in my limited tests.
Note that Mozilla's "Project DeepSpeech" is just a training and recognition engine, and really an implementation of a specific design for LVCSR. A full recognition system requires statistical models, generally trained from very large sources of data, which you have to bring yourself.
The data is also included (for english, data for other languages is being currently collected). Just search for "common voice".