  With the recent advance in speech technology, smart voice assistants have
been improved and are now used by many people. But often these assistants are
running online as a cloud service and are not always known for a good
protection of users' privacy. This paper presents the architecture of a novel
voice assistant, called Jaco, with the following features: (a) It can run
completely offline, even on low resource devices like a RaspberryPi. (b)
Through a skill concept it can be easily extended. (c) The architectural focus
is on protecting users' privacy, but without restricting capabilities for
developers. (d) It supports multiple languages. (e) It is competitive with
other voice assistant solutions. In this respect the assistant combines and
extends the advantages of other approaches.
