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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.

Nexmo provides innovative communication APIs that bridge traditional voice and text services with cloud communications.

An simple text message API.

Plivo is a voice and SMS API platform that enables developers and enterprises to build powerful apps with great features. With 24/7 free tech support and low prices, Plivo can help your business scale globally.

This RESTful API is a modern API that lets you use the message services provided by iP.1 Networks AB via your own applications. Do everything from just sending SMS messages to managing contacts and sending surveys.

Spring Edge is one of the premier business communication solutions provider, Spring Edge's core services includes messaging and voice communications with comprehensive and customized platform for all business scales.

SMS Gateway is your bridge between the Internet and the world of cell phone SMS text messaging. We've taken care of all the complicated details and harnessed the sophisticated technology necessary to bring you a simple solution for sending SMS text messages from a web or desktop application.

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.

The leading solution for text message and call verification. Build your SMS & VoIP applications with one easy API. Try it for free

CrazyCall helps contact centers and sales teams boost performance of their outbound and inbound projects. Quick and easy to install, it lets you make and receive calls directly in your browser within minutes of creating your account. With our automatic dialer you no longer need to dial numbers manually. You can also set rules to manage your queue and reschedule calls automatically. Choose a phone number from over 60 countries. Save money with competitive international connection rates and free minutes in every plan. Monitor your projects in real-time with daily dashboards, live listening, call recording and advanced reporting. »

CallHub is a hosted voice broadcasting software. It is used to call people and alert them of deals, updates, building closures and other information quickly. Campaigns can be run at very high number of calls per second. It can be personalized with custom audio message or the text to speech engine could be used.

Textlocal bulk SMS service allows you to quickly reach out to millions of your customers, prospects and staff within seconds at the click of a button. With our unparalleled features, you can now easily personalize your messages, attach images and PDFs, include web links as calls-to-action, send discount vouchers and coupons, and collect data via mobile forms. What’s more, you can even measure your campaign performance in real-time.

CALLR is a voice and messaging API available through REST, JSON-RPC and SDKs (PHP, Python, Ruby, Go, Node.JS, Swift, Java, .NET). It's built with many features made to help brands create smarter interaction with their customers and prospects. CALLR's services are available worldwide in 220+ countries. Two web interfaces, SENDR (Campaign Management) and CALLTRACKR (calltracking and click-to-call) are available to offer access to CALLR's services without having to code.Here are our six main business use cases:SIP Trunking (Outbound and inbound calls at scale) - Conveniently handle my important outgoing call needs. Face any international needs with an adaptive solution that matches my location, and network situation.User Acquisition and Engagement (Outbound calls and SMS campaigns) - Generate online and in-store traffic and keep users engaged using automated and scalable communications methods. Easily broadcast news about sales and events to my customer base.Notifications (Personalized outbound calls and SMS) - Send personalized messages to your customers at key steps of their journey. Notify them of main events and make sure they receive your messages.Custom IVR (Inbound or outbound calls control menu) - Create a smart mapping to route incoming calls according to the rules I set. Make sure each call I receive is handled the quickest and most efficient way.Call Tracking (Inbound calls source identification) - Track incoming calls activity and know where my users found my number. Track calls generated for and routed to a third party.Person to Person Communication (Users calls and SMS safeguarding) - Easily allow my users to exchange with each other on their usual channels. Frame the interaction to ensure its security and keep it smooth. »

engageSPARK enables anyone, anywhere to build and launch SMS and Voice Call messaging, surveying, and decision tree programs to 200+ countries – within minutes. It is a self-service website where any non-technical person can easily, quickly, and cheaply create messaging campaigns, curriculums, surveys, reminders, alerts, decision tree programs, etc. to send key information and collect important data from their participants.