Apps similar to Kannel include Textmagic. It's paid, but Jasmin SMS Gateway is free. Other options are KAPSYSTEM, Ozeki NG SMS Gateway, Power SMPP and Textable. In total there are nine apps like Kannel for the web, Android, Windows, Linux and iPhone.
Cloud-based SMS messaging service provides bulk text notifications, alerts, and campaigns. Features 2-way chat, contact management, API, mobile keywords, polling, analytics, toll-free and scheduled messaging, flexible pricing, and virtual numbers.
United Kingdom
Jasmin is a very complete open source SMS Gateway with many enterprise-class features such as:
KAP Computer Solutions Pvt. Ltd., (KAPSYSTEM) pioneer in BULK SMS Solutions. KAPSYSTEM provides messaging and voice communications with comprehensive and customized platform for all businesses.
India
Ozeki NG SMS Gateway is a powerful, reliable and flexible SMS Gateway application. It enables you to send/receive huge amount of SMS and MMS messages from Microsoft Windows-based computer to mobile devices.
United Kingdom
Power SMPP is an Enterprise grade two way messaging software, for high availability, high throughput, A2P SMS business. Wholesale and retail SMS hubbing platform with Reliable Billing, Advanced Routing and Multiple Gateway connections.
Textable is an app that allows businesses to text their customers via SMS. They provide you with a dedicated number you can share with your customers, the ability to send out mass messages, and automated messages for your frequently asked questions.
Canada
Send and receive text messages directly from and to your web application or IT systems via our API. With access to our well documented and supported API you will be able to connect directly to our Messaging Platform.
Sending Bulk SMS to the customers will engage the customers with your business and new offers. Customers engagement set a new level for the businesses.
You can send and receive SMS messages from your Windows computer or Windows Tablet, just like you would from a mobile phone.
