There was (or is) one called Mycroft which had promised big things but didn't deliver a compelling recognition and synthesis, although the recognition seems bet

There was (or is) one called Mycroft which had promised big things but didn't deliver a compelling recognition and synthesis, although the recognition seems better than synthesis from what I have seen. They did open source much of the work at least initially. There is a video showing an example of how bad the UX was for a simple question asking about beans https://youtu.be/D5J7vVQNkCw https://youtu.be/D5J7vVQNkCw.