Zavu

Multichannel messaging SaaS to manage SMS, Email and RCS from a single interface. Supports transactional and marketing messaging, automation workflows, OTP authentication and API-based integrations.

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.

It is a cross-platform mail client library built on top of MimeKit. The main goal of this project is to provide the .NET world with robust, fully featured and RFC-compliant SMTP, POP3, and IMAP client implementations.

As soon as a mailbox is connected, we create a metadata index of its content starting from the most recent emails which become available from the API within seconds. Context.IO takes care of synching email data for your app so you don't have to build, scale and maintain this infrastructure yourself. Focus on what's unique to your business, we'll manage the technical details of integrating with arcane email server protocols.

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.

A full-featured email creation and transfer class for PHP. It is a class library for PHP that provides a collection of functions to build and send email messages. PHPMailer supports several ways of sending email: mail() , Sendmail, qmail & direct to SMTP servers.

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.

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

It allows sending email directly from Javascript, with no backend development. The developers create one or more email templates (dynamic content supported) and then trigger an email using our Javascript SDK, specifying the template, and the dynamic parameters for rendering the email.

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.

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.

mailparser.io is a web-based email processing software which allows you to pull any kind of data from incoming e-mails based on custom parsing rules. The parsed data can be sent to any API with webhooks.

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.

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.

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.

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.

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.

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.

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.

It is an API-first email hosting service with a user-friendly interface. It provides affordable scalability for small & large businesses using dedicated email servers without any per-user/per-domain limits. Furthermore, the powerful API enables you to meet your changing business requirements with ease.

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.

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.

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.

Scringo offers a unique Community &amp; Messaging Platform that turns every app into an independent, dynamic &amp; fully functional social network.

It is ‪a chat API and SDK that enables users to build chat messaging functionality into their apps or websites within minutes, saving them months of development time.‬

It is a readymade chat solution on Android, iOS & Web. Its diverse uses of social, enterprise, in-app, and personal chat. It is 100% customizable, with full access to the source code.

MirrorFly is a leading CPaaS provider offering customizable text, voice, and video chat solutions for enterprises. The self-hosted Chat APIs and SDKs enable businesses to build their own chat platform with 1000+ messaging features.

It provides realtime Chat SDK and Messaging API for Mobile Apps and Websites. It is developer friendly and can be installed into Android, iOS and Javascript applications within minutes.

It can parse emails which contain travel reservations and return those reservations in a structured format (JSON). We can extract travel itineraries from virtually any travel provider. We support thousands of email formats and we have a dedicated team of developers who constantly work on improving the API by adding new parsers to support new email formats.

Hypermail is a cold email marketing solution. We handle all aspects of email marketing. Whether it is a self service account or if need us to manage the whole campaign. We offer an easy to use platform, with an API, and built for resellers/whitlelabel. In addition, we stay up to date with latest technologies, and offer built AI features to improve your campaigns. Secondary offerings include, email list verification, Smart Relay which allows you to connect multiple esps via SMTP to send your campaigns, B2B data, and last SMS/MMS for political campaigns.

MirrorFly Video Call SDK lets you embed secure, real-time video calling into web and mobile apps with full UI control, scalability, and enterprise-grade security.

The Talkray Developer API is a white-label cloud-hosted platform to easily enable all forms of real-time and asynchronous&nbsp;communication&nbsp;between your mobile users.&nbsp;With a few lines of code, you can connect your users together at&nbsp;unparalleled&nbsp;speed and scale.&nbsp;

ZEGOCLOUD provides global developers with real-time audio/video SDKs, AI Agents, low-latency live streaming, and in-app messaging solutions. Build high-quality voice chat, video calls, interactive live streams, and AI-powered companion or support experiences with a few lines of code.

Web2Phone is a lightweight form backend that sends website form submissions instantly to WhatsApp and email. Simple setup, spam protection, and real-time delivery.

TeleOSS provides high-throughput SMS gateway software, SMPP/SIGTRAN support, and global messaging solutions.

It is a complete sticker API for up-to-date chat interfaces. Engage your users with a fun, dynamic stickers. Give them the freedom to express and interact – and stay with you.

It is an open source Conversational Platform to store, structure and utilize conversational data in a secure and privacy-compliant way. It can power a variety of use cases, from hosting your own Messaging API to integrating with Conversational AI.