If your asking if their's another service like Google voice, I'm not sure. I haven't done much more digging on text message bot integration, although you could make an irc bot which would operate on the same principle, just not through text, and not as private.
Hey, I was working on a project similar to that a while ago that interfaced with google voice! However Google voices api was deprecated and my project never really got any further. Here's a link to the git hub repo https://github.com/janbro/J.A.R.V.I.S
Edit: Scratch that, my project was nothing like their's, my JARVIS was meant to be a fully autonomous sms personal assistant. Apparently this is a service which assigns you two human people you text for things who are "aided" by artificial intelligence and futuristic tech, whatever that implies. Their FAQ page says a bit more about the service, although not enough for me to want to subscribe to it