Bitcall

It is a cross-platform mobile messaging app for iPhone, BlackBerry, Android, Windows Phone and Nokia. It allows users to send text messages and voice messages, make voice and video calls, and share images, documents, user locations, and other media.

A set of billing and subscription tools for developers and business people. Developers can use out-of-the-box functionality to get started quickly or use the composable API building blocks to design fully customized subscription logic and pricing models. Business people can create and manage subscriptions and invoices—and view detailed financial reports.

Chargebee is a subscription billing platform that lets you bill, manage and understand your SaaS or subscription based eCommerce business easily.

SendBird is a Messaging SDK, Chat API, and fully managed chat infrastructure for your mobile apps and websites. Embeddable chat for iOS, Android, JavaScript, Unity, .NET.

Use the Messaging API to build bots that provide personalized experiences for your users on LINE. You associate your bot with a channel on the LINE Platform. The bot works behind the LINE Official Account that is generated when you create the channel if you operate the account in bot mode.

Agora.io provides building blocks for you to add real-time voice and video communications through a simple and powerful SDK. You can integrate the Agora SDK to enable real-time communications in your own application quickly.

Since RingCentral is cloud based, you enjoy the freedom to connect and manage multiple locations, devices and workers within your cloud phone system. You can easily customize users, departments, and call handling rules. No matter where you, or the users, are. You only need a high-speed Internet connection and your phone system is ready to work lightning fast, anytime and anyplace. There’s no PBX hardware.

Aircall is an app that you can install and setup in a few minutes. It lets you buy one or several phone numbers across the world, add teammates to your dashboard, and place & receive calls on your existing devices. Everything is managed inside the Aircall app.

It adds the clarity and emotion of face-to-face communication to your brand whether you're developing for the web, iOS, or Android. We make the integration of high-quality live video a breeze so that you can focus on building a great product.

The Twilio API for WhatsApp provides developers all over the world with a simple, reliable, and officially supported way to use the WhatsApp Business API. They can now easily build messaging experiences that combine the ease of use of the Programmable SMS API with the global reach of WhatsApp.

Sinch makes it easy for developers to add voice, messaging and SMS to their apps with just a few lines of code. Enrich your apps with communications that your users will love.

It is an open standards IP PBX that offers complete Unified Communications, out of the box. Suitable for any business size or industry it can accommodate to your every need; from mobility and status to advanced contact center features and more, at a fraction of the cost.

It is a graphical programming interface that provides designers access to parametric modeling and data-driven customized workflows for building information modeling (BIM). It can run as an addin for Autodesk Revit and Autodesk Vasari, with the ability to manage Revit project files and family definitions, or it can run as a standalone program. It allows users to control complex geometry, construct parametric relationships, manage data, and automate tasks.

Add powerful communication features to your mobile app and data services for your backend<br>

It is a pure-cloud business communication platform that's in tune with the way your team works . Connect your team with a business communication platform that powers voice, video, messages, and meetings across your existing devices.

It provides free subscription metrics to help you identify opportunities and then tools to help you reduce churn, optimize pricing, and grow your subscription business end-to-end.

It is a cross-platform messaging app. Privacy isn’t an optional mode – it’s just the way that Signal works. Every message, every call, every time.

It is a cross-platform instant messaging and voice over IP application provided as freeware for the Microsoft Windows, macOS, Linux, Android and iOS platforms.

Chatkit is designed to make it as simple as possible to add chat to your app. It lets you add 1-1 and group chat to your app, along with typing indicators, file attachments and storage, user online presence and a flexible permissions system.

Chat API and SDK. With a beautiful UI Kit, easy to use React Components and powerful API. Add Chat to any application in a matter of hours. The tech uses Go, RocksDB and Raft. By the creators of Stream, the API that powers activity feeds for more than 300 million users.

Layer's asynchronous messaging fabric is capable of transporting payloads of any type. Get your users talking with chat, voice or video messaging. Pull them back in with push. Connect friends, colleagues or perfect strangers seamlessly.

It is the shopify subscription solution for online businesses. It makes it easy to transform one-time products into subscription options. It was built with the goal of making payments easy for customers. This was primarily by looking for ways for customers to reorder products

Sound more professional and stay connected with Grasshopper, the Virtual Phone System designed for entrepreneurs. Grasshopper works just like a traditional phone system, but requires no hardware to purchase or software to install.

It is a drop-in metered billing system that gives you the flexibility to bill how you want. It enables software companies to offer usage-based billing. It helps companies meter customer usage, price according to flexible plans, and bill customers through payment gateways.

TalkJS provides a chat API & Javascript SDK with a pre-built UI that allows developers to add chat between users on websites and apps in hours instead of months.

CometChat offers a comprehensive in-app chat SDK platform that equips businesses with the tools to integrate real-time chat, voice, and video into their applications.

LiveKit is a set of APIs and SDKs which make it easy to build and scale live video and audio features in your application. Use cases include interactive live streaming, video calls, communications in games, and robotics teleoperations.

Stay connected, organized, and on task with an easy-to-use phone solution that fits organizations of any size.

Qonversion allows fast in-app subscription implementation. It provides the back-end infrastructure to validate user receipts and manage cross-platform user access to paid content on your app, so you do not need to build your own server.

It is a tool that lets you define and manage your SaaS application's pricing model following best PriceOps practices. It helps you to define a single source of pricing truth that can be safely and easily updated, with a simple JSON definition optimized for SaaS use cases. This keeps everything aligned as you find the best product-market fit.

Create a better customer experience with SMS, Chat Apps, Video Interaction & Voice. It’s integrated communications platform as a service (CPaaS) streamlines multiple communications channels into a single dashboard.

It is one of the leading online invoice software in the market. The cloud based invoicing and billing software has catered to more than 3.5 million users around the globe since the past 16+ years. The software can be customized according to individual business need and works for Enterprises, Small Businesses and Freelancers.

Ring your mobile phone, computer, and desk phone at the same time. Answer calls and switch seamlessly between devices. Use your personal device with a business phone number so you're always reachable.

All-in-one phone system for startups and small businesses. It adds a work phone number to your existing devices. No need to carry two phones or extra SIM cards.

Moxtra is the contextual communication + collaboration layer for your mobile and web applications|. Enhance user engagement by adding in-app communication+collaboration. Integrate chat, voice meetings, screen sharing and recording, and multimedia annotation. The Moxtra Cloud is mobile-first and is built to scale on demand to meet your growing needs.

SendHub is a simple, fast, web and mobile communication tool that provides businesses, and organizations, with a call and messaging solution to reach small and large groups of people.

An open and extensible chat SDK and APIs for building powerful 1:1 and group chat quickly. Build core chat features quickly, extend functionality with a rich plugin library and customize with programmable Functions-as-a-Service. Powered by the PubNub Network.

It is a SaaS platform empowering subscriptions app. It helps companies build and grow their mobile revenues by streamlining In-App Purchase integration.

It is a unified communications server software that brings together IP PBX, email, IM, faxing and collaboration functionality. It has a Web interface and includes capabilities such as a call center software with predictive dialing.

It is an Intelligent Phone System for run companies by managing call and forward to anyone. It is very helpful to build a relationship with clients

Add In-App User-to-User Communication into Mobile Apps & Websites, with rich & engaging Text Chat, Video, and Audio Calling experiences, to Increase User Engagement and Enable new Revenue Streams.

It is an Internet-based phone network that enables clients to make and receive calls from any device connected to the Internet. It enables you to setup your business telephone system without the heavy hardware and wiring expenses.

It is intuitive to use. Use the individual invoice template in your billing program and send your online invoice directly to your customer.

Quickly add Voice, Video, SMS to your web and mobile applications. It is a communication platform which provides APIs that help clients quickly add Voice/Video/SMS to any application.

Easily integrate subscriptions to your iOS app. View key metrics and send events to mobile analytics. Get cancellation insights and increase app revenue.

It brings rich communication APIs to all your applications across any device, on any platform, using the same reliable and secure infrastructure that powers Microsoft Teams.

It is a simple and secure mobile and web chat library that enables you to add messaging in just a few minutes on your android, iOS, and web apps. No need to develop or maintain any infrastructure.

Add video and audio chat to any app, in minutes. Daily's APIs help developers build the best possible video experiences, quickly and easily. Use our Prebuilt UI or build completely custom video conferencing interfaces.

Popcorn Notify is designed to be an effortless method for sending emails and text messages from your code. Client libraries are simple to install and are available on pip and npm.

Create unique conference rooms on demand, without having to reuse the same IDs. Self-hosted free option works for most, but commercial licensing is available for more features and support.