Sites and apps similar to IDT Express include Twilio. It's paid, but Tellephant is free. Other options are SendSMSGate and Maytapi. In total there are four Video Calling Apps like IDT Express.
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.
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Tellephant is a one stop shop for everything you need to grow your business. Make your business more accessible with WhatsApp!
Cheap SMS Gateway with simple API and 24/7 Support. Pricing cheaper than Twilio in 2-3 times. Good choice for startups.
WhatsApp is a popular messaging platform around the globe. With Maytapi you can send and receive messages from WhatsApp using simple HTTP requests. Integrate your marketing or business platform (Shopify, Woocommerce, CRM ets.) to WhatsApp easily.
