You will get more cheap sms when your volume become big. One million sms you can get 2.5 Naria with the speed of 2000 sms per minute

Many of them providing re branded panel with Reseller panel so that you can get it easily and sell to your clients without revealing the identity

Many of them will provide you only web based panel but they forget they can provide the SMPP and HTTP API for integrating with your website.

CANNYINFOTECH as per my knowledge offers the HTTP API free sample programs in including PHP,ASP.net and other web applications also.

The use of the integration is when the CUSTOMER visit your site try to fill contact us page and send you a email YOU WILL GET SMS ALERT ALSO. so you can immediately check the email and reply to him or CALL HIM

before purchasing you have to deice three important things

1.How many years they are in service.this will help you to find a the good provider
2.IS there any validity for the sms ( so sometimes before you finish sms they will close your account)
3.Is the dynamic sender id and Delivery report( which helps you to find sms has gone correctly or not)

Check with any provider like CANNYINFOTECH and compare the prices after this three things and take your own decision

many of the service provider are providing i really has supplied sms service to many institutions using CANNY INFOTECH SMS Service

you have to do SEO for your website then google will send you traffic you can earn big money