FTSite: ''Simple, straightforward, pricing. $1 for the first four pages, $0.25 for each additional page.'' Twilio charges are generally under $0.25/min for out

FTSite: ''Simple, straightforward, pricing. $1 for the first four pages, $0.25 for each additional page.'' Twilio charges are generally under $0.25/min for outbound phone calls in the U.S. and $0.01/page for programmable fax. If you choose not to opt for Twilio Fax API, lambda function to encode and send the fax is a fraction of a penny instead. So there's probably some room for profit margin either way.