SMS Gateway Providers

·         TextLocal

o   They provide an API to use http://www.textlocal.com/sms-api-integrations

o   Commercial – PAYG (2.4p per text) or Monthly payments

·         ClickATell

o   API: https://www.clickatell.com/developers/2015/10/08/rest-api/

o   Commercial (2.9p per message)

·         Twilio:

o   https://www.twilio.com/sms/api

o   Commercial

·         Email to SMS Gateway (doesn’t seem to be reliable):

o   https://sites.google.com/site/emailtosmsgateway/

Dynmark:

• http://www.dynmark.com/sms
• http://docs.dynmark.com/docs/qs-cs-send-sms-messages
• https://services.dynmark.com/WebServices/MessagingServicesWS.asmx
• 2.4p per message

·         There seems to be a way also with pure .NET but need to look into it if it has any drawbacks: http://www.codeproject.com/Articles/19023/Sending-SMS-using-NET

Sinch
Nexmo
Plivo