Here are some of the best available – I’ve chosen a few that use different techniques and programming languages. To build your custom solution that recognizes audio and voice signals, there are some really great libraries you can use. For a free, custom voice recognition system, you’ll need to use a different set of tools. And, you can’t customize them very much, as all the processing is done on a remote server. Of course, the downside is that most of them aren’t free. This is an easy and powerful method, as you’ll essentially have access to all the resources and speech recognition algorithms of these big companies.

Microsoft Cognitive Services – Bing Speech API.All you need to do is query the API with audio in your code, and it will return the text.

Many of the big cloud providers have APIs you can use for voice recognition. Before we jump into how to make a speech recognition system, let’s take a look at some of the tools you can use to build your own speech recognition system.

Open source speech to text software