Voxpow

Voxpow supports your global user base, recognizing more than 100 languages and variants. They use Google Cloud Speech-to-Text stream to convert results, immediately returning text as the user is speaking.

Voxpow has no dependencies, uses pure JavaScript, weighs just 3 KB, and is free and easy to use. Place the installation code in your website HTML body tag, and you are ready to go. You can define and add some custom commands inside of your website. If the user says that -> makes that, it is easy! In that way, you are giving the ability users to use your site in a new style.