I have a great idea in the SMS market but I can't tell which provider is best a startup just trying to get away with paying as little as possible.<p>options are:
(a) https://www.tropo.com/
(b) http://www.fastsms.co.uk/topic-pages/bulk-sms.html?source=aw-bulksms-2;
(c) http://www.esendex.co.uk/; or
(d) http://www.textmarketer.co.uk/index.htm.<p>Maybe you know a better one?
Have a look at <a href="http://nexmo.com" rel="nofollow">http://nexmo.com</a> which is a wholesale SMS API with direct to carrier model and REST Cloud based.