DialMyCalls - The easy to use mass and emergency notification platform. Send a phone call, text message or e-mail to your entire list of people in seconds.
Twilio - Brings voice and messaging to your web and mobile applications.
InformaCast - InformaCast is a leading mass notification software solution that helps organizations reach everyone with critical information.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Omnigo - Omnigo ensures a safer tomorrow by delivering security management, incident reporting, and public safety software for law enforcement, education, dispatch, and more
BulkSMS - SMS messaging service provider offering two-way SMS communication services.