This is awesome! Just out of curiosity, who (or what) do you use on the back-end? Is there like a Twilio for faxes?
Our goal is to provide devs that have mission-critical applications with the most reliable and redundant faxing capabilities. (If you've dealt with faxing, you know it's annoyingly finicky.)
Re: We're fans of Twilio, but our approach to solving this problem is significantly different.
(I'm answering the second question above, not necessarily the first)
edit: I guess I was answering both :)
Edit: I guess the phone number makes faxrocket a better deal for low usage, but phaxio becomes much cheaper quickly.