Pop Fax can be used by both corporate and home users, faxes sent using email or web interfaces.
They boast a worldwide service from 0.04p per page. Unlimited reception and a local fax number.
A free trial is available, it allows the use of the mobile app as well as the other services and the ability to send and reicieve faxes from a free local number.
A service they can provide is a fax mailing system. It allows the ability for clients to sign up to a faxable newsletter with blacklist and unsubscribing tools built in.