Their IA assistant seems really interesting, and I would really love to give it a try, but I don't want to invest energy if there is a high risk that the service shuts down soon.
I remember the Tranquilien app [0], which was also developed by Snips. There was a lot of media talking about it, but it has been quickly stopped :(.
[0] https://www.digital.sncf.com/store/applications/tranquilien-...
Since the libraries are all mirrored on crates.io and, by design, cannot be removed once they are published, you should be good, at least until the day the owners of crates.io stop being able to pay the server costs.
I believe that you can also host local mirrors, but I haven't checked that.
On Techcrunch [0] > The team didn’t have a product or business model in mind. It experimented for a while, launching projects around smart cities, such as Tranquilien, a service that predicts how busy your train is going to be, or a smart empty parking spot prediction service.``
[0] https://techcrunch.com/2015/06/26/snips-grabs-6-3-million-to...