Apps similar to SMS Sender 24 include Twilio. It's paid, but SMSGate App is free. Other options are textbee.dev and Vendel. In total there are four Video Calling Apps like SMS Sender 24 for the web, Android and self-hosting.
Twilio is a web-service API that lets you use your existing web languages and skills to build voice and SMS applications. We focus on building a simple, powerful, pay-as-you-go communications platform so that you can focus on what you do best.
United States
textbee.dev is an open-source SMS gateway that enables users to send and receive SMS messages via a web dashboard or a REST API. Perfect for businesses, developers, and hobbyists who need a reliable and cost-effective way to automate SMS messaging.
Ethiopia
A secure, open-source solution for sending and receiving SMS messages via Android devices. No registration, email, or phone number required - just install and use.
Vendel is a full-stack platform for SMS management and delivery through connected devices. It allows sending SMS messages using registered devices (Android phones or modems) as gateways, with quota management, webhooks, and multi-user support.
Cuba
