(Flask + Heroku + SpeechRecognition + Recorderjs)
Flask is a micro web framework written in Python.
SpeechRecognition Library for performing speech recognition, with support for several engines and APIs, online and offline.
Heroku is a platform as a service (PaaS) that enables developers to build, run, and operate applications entirely in the cloud.
Recorderjs A plugin for recording/exporting the output of Web Audio API nodes