I am looking for a SMS gateway through which I can send SMSes in multiple countries (and multiple operators in a country). This is a requirement for a webapp I am working on. Please suggests some good (read reliable and economical) SMS gateways which you have used/heard of.
You can try Nexmo SMS API : <a href="http://nexmo.com" rel="nofollow">http://nexmo.com</a> (I work for them).<p>It gives you reach to more than 200 countries (reaching multiple operators on each country) and Long Numbers for inbound traffic in a few countries. The REST API is very simple to connect and SMPP is also supported.<p>Let us know if you have questions:info@nexmo.com
Tropo.com and Twillio.com. Their international rates are expensive though. For India, there's kookoo.in. There might be other similar localized telephony services.