Cheapest way to send SMS for number verification? [closed]

Answer 1

Try www.bulksms.com - they have been around for over 10 years now, and specialise in pure SMS messaging - nothing else. A simple HTTP API, good delivery, operational in UK, Europe, USA, Africa and more.

Answer 2

I'd suggest using TextAnywhere:

Text Anywhere

They provide API's (C, Java, .Net, PHP etc) for several languages and provide a multitude of rates and packages depending on the volume of texts sent.

They're also very flexible with regards to payment - they do pre-pay, PAYG and fixed monthly limits.

Pricing

We used them for a large-sized application to send alert notification messages and they were very reliable. They also give 15% discount for registered charities and academic institutions.

Answer 3

UPDATE:

Well a new service called Number Guru launch and they offer a developers API, not sure if it's free

• http://www.numberguru.com/developer

OLD:

I would suggest OpenMarket as a SMS aggregator. They offer Number Lookups as part of their service if you needed two-way communication with a Short Code.

If you just need to send a one-way SMS/Text message (Like alerts) but the user would have to opt-out via email and then be removed from your service. You could use something like Neustar number verification LEAP to do a number lookup (Which displays the carrier information) and use the SMS Email Gateway to send the SMS messages.

Answer 4

The absolute cheapest way (I can think of) is set up a system yourself.

By a contract to some cell phone provider and hook this up to your linux computer.

http://www.dealextreme.com/details.dx/sku.12057

Here is a thread discussing the set up process on linux. It's not a walk in the park but it is cheap.

https://web.archive.org/web/20100130041340/http://www.dealextreme.com/forums/Default.dx/sku.12057~threadid.88670

Answer 5

You might take a look at using a Google Voice API, because it'd be free. I'm not sure which language you're using but here's a API for python that should let you do it. http://code.google.com/p/pygooglevoice/

Answer 6

If you need verify an mobile number, not send sms and not confirm propietary, then you should search for "HLR Look up gateways", it´s cheaper than send SMS.