Twilio offers developers a powerful API for phone services to make and receive phone calls, and send and receive text messages. Their product allows programmers to more easily integrate various communication methods into their software and programs. | PubNub makes it easy for you to add real-time capabilities to your apps, without worrying about the infrastructure. Build apps that allow your users to engage in real-time across mobile, browser, desktop and server. |
Phone- Phone Numbers API;Phone- Convert Text to Speech and Play Audio;Phone- Record Calls and Store Them;Phone- Create Conferences;Phone- API Queueing;Phone- Call Queues;Phone- Convert Speech to Text;Phone- Usage API;Phone- Status Callbacks and Logs;Phone- Global Reach;SMS- Supports Unicode;SMS- Message Queueing;SMS- Realtime API;SMS- Global Reach;SMS- Status Callbacks and Logs;SMS- Usage metering & API triggers;SMS- Voice Enabled Numbers;SMS- Short Codes;Two-factor authentication;Call tracking;Voice broadcasting;Cloud IVR;Mobile app distribution | PubNub SDKs support over 50 of the most popular environments, including: iOS, Android, JavaScript, .NET, Java, Ruby, Python, PHP and many more.;Data Push - Establish and maintain persistent socket connections to any device (mobile, browser, desktop and server) and push data to global audiences in less than ¼ of a second;Presence - Automatically detect when users enter or leave your app and whether machines are online;Storage and Playback- Store your real-time data streams for future access, “playback” or re-publish;Mobile - Easily manage the complexity of real-time apps on mobile devices;Analytics - Simulate an audience of millions. See a live view of audience size, engagement and geography;Security - Protect your real-time data with easy to use enterprise-grade security |
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Stacks 11.5K | Stacks 239 |
Followers 8.8K | Followers 458 |
Votes 521 | Votes 238 |
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Firebase is a cloud service designed to power real-time, collaborative applications. Simply add the Firebase library to your application to gain access to a shared data structure; any changes you make to that data are automatically synchronized with the Firebase cloud and with other clients within milliseconds.

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Pusher is the category leader in delightful APIs for app developers building communication and collaboration features.

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Ably offers WebSockets, stream resume, history, presence, and managed third-party integrations to make it simple to build, extend, and deliver digital realtime experiences at scale.

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Scalable Server for Realtime Web Apps with JSON structures that can be read, manipulated and listened to, messages that can be sent to one or more subscribers, and request response workflows, between two clients or servers.