What are some alternatives?
When comparing OneNote Online and CMU Sphinx, you can also consider the following products
OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.
IBM Watson Speech to Text - IBM Watson Speech to Text is a tool that can be used anywhere if there is a need to bridge the gap between the spoken word and its written form, it uses machine intelligence to combine information about grammar and language structure.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Dictanote - Switch effortlessly between using the keyboard and your voice to type out notes.
AllMyNotes Organizer - AllMyNotes Organizer is a multi-functional hierarchical information manager for Windows.
Speechmatics - As experts in Machine Learning, Speechmatics provides Automatic Speech Recognition available in private or public clouds and securely on-premises.