Need a paid SMS sending interface for INTERNATIONAL transactional SMSes

I am looking for a Paid, Premium service that will allow me to RELIABLY send transactional SMS-es INTERNATIONALLY. Not only to the United States and Canada, but to all over the world. I've been looking around but have had no success f开发者_运维知识库inding one. Does anyone know of a platform? I've seen Twilio, but do not think they send International.

I am NOT looking for a bulk spamming service. My need is to send sing up verification codes, password requests, online account notifications and such.

Will appreciate any leads.

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I am using twilio for last two years and my experience is amazing. Check this out http://www.twilio.com/international-sms