Comparison of voice assistants

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There are lots of (open) voice assistants out there. Maybe we can make a comparison list of which assistants exists, in which points they're equal and which aspects differ.

Comparison of available voice assistants
Mycroft AI SEPIA Rhasspy Leon Genie
Target group Makers, tinkerers, smart-home enthusiasts,

end-users via mobile app

anyone, private user or enterprise mobile app for Android and iOS available, WebApp for Windows and MacOS
License MIT Apache 2.0

LGPL 2.1
Requires internet access 100% offline is possible, but services

like Wikipedia or news require internet

offline engines, but services like Thingtalk for web services, require internet Yes, for STT
Offline STT via SEPIA STT No No, only Google and IBM Watson STT
Offline TTS via SEPIA-Home No Yes, with Flite

Comment Highly customizable. Modules can be distributed to

multiple Raspberry Pis in home network.

Genie is one of the core technologies enabling the Stanford open Virtual Assistant architecture. See: Susi AI is an intelligent Open Source personal assistant. It is capable of chat and voice interaction and by using APIS to perform actions such as music playback, making to-do lists, setting alarms, streaming podcasts, playing audiobooks, and providing weather, traffic, and other real time information.
Linux Yes Yes
Windows Yes Yes
Mac OS X Yes Yes
Raspberry Pi Yes unsure
Own hw product line No (maybe someday ^^) No No