I’ve only played around with mycroft a bit, but I’m pretty sure the language processing occurs via cloud (home.mycroft.ai). As it’s open source, you can plug it into a local STT if you want to. The Snips.ai platform seems like it was designed for keeping everything local out-of-the-box, which is why I’m going to try it out this afternoon! After all, I really only want it to understand a handful of commands, mainly around audio and lights.