Speech recognition allows natural communication between the humans
and machines. With Industry 4.0 there is a great demand for
systems that perform this task, since human-machine integrations
are increasingly attractive. Currently, there are several tools and resources
that perform this activity, with some companies providing
their audio recognition services through the Application Programming
Interface, such as Microsoft, Google, IBM and Wit. On the
other hand, there are offline libraries and open source that can also
be explored like Vosk. Each company has its business rule and its
specificity, in this sense it is difficult to know which is the most interesting
for each situation. Thus, a comparison was made between
speech recognition services in terms of usability, limitation and
precision. In the comparison, speech recognition performance metrics
were used in a set of audios, using the programming language
Python.