Twilio Voice and SMS

Twilio Voice and SMS

I am attempting to integrate two way voice and two way sms into my ZoHo CRM system.  Is Twilio the answer?
I was hoping that Ring central would do the trick but they do only the voice side...  Or at least when I have the voice side installed, the sms doesn't work. Maybe I could trigger SMS through webhooks...  Would wish to avoid that extra horsing around if I can help it.

So to reiterate, what is the best partner for seamless voice and sms integration into CRM?

Any ideas?
Thanks
Dave Olson