For what it's worth, the BotBuilder from Microsoft is open-source: https://github.com/Microsoft/BotBuilder https://github.com/Microsoft/BotBuilder - could be wo

For what it's worth, the BotBuilder from Microsoft is open-source: https://github.com/Microsoft/BotBuilder https://github.com/Microsoft/BotBuilder - could be worth a peek. As the website states, this SDK is only "one of three main components of the Microsoft Bot Framework", and I'm not sure if the other two are open-source, but it shouldn't be all that significant given that it's just integration with Microsoft products, like Office 365, plus the bot directory, which I imagine consists of some ready-to-use bots one could possibly piggyback on. This is not voice recognition, but once you're past that stage what you have on your hands is a piece of text anyway - which has to be parsed and processed.