Best Chat SDK & API Software of 2026

Use the language you already love to prototype ideas quickly, develop production-ready communications applications, and run serverless applications on one API-powered platform. Twilio is a single fully-programmable platform with flexible APIs for any channel, built-in intelligence, and global infrastructure to support you at scale. Quickly integrate powerful APIs to start building solutions for SMS and WhatsApp messaging, voice, video, and email. Browse documentation and SDKs in multiple coding languages, including Ruby, Python, PHP, Node.js, java, and C#, or jumpstart your first project with our open source code templates to quickly build production-ready communications apps. Consult our community of over 9 million developers for guidance and inspiration on your next project. Sign up and start building today.

The complete in-app collaboration API and SDK. Add contextual activity feeds, chat, and document collaboration directly into your apps to increase user engagement, improve in-app retention, and reduce customer churn. Modern apps need advanced collaboration features. Period. And let’s face it — a lot of app developers struggle to prioritize building their core functionality versus adding the contextual collaboration features that keep users engaged and productive. The big B2B tech players are already acquiring or building out chat, secure file sharing, contextual activity feeds and threaded conversations functions, which means every app is going to need them to stay competitive. That’s where Weavy comes in.

Bird, previously known as MessageBird, represents the future of CRM tailored for Marketing, Sales, and Payments, facilitating more than 5 trillion messages each year across platforms like Email, SMS, and WhatsApp. Top brands efficiently enhance their growth through Bird by engaging in tailored interactions across these channels. Innovative organizations around the globe utilize Bird's robust applications and APIs to create effective communication solutions. Start your journey today and connect with your customers seamlessly across various channels, catering to diverse use cases regardless of location. You can send marketing messages, push notifications, order confirmations, delivery updates, and much more. If operational challenges are hindering your growth, leverage automated conversations and workflows to gather essential information upfront, minimize manual tasks, establish self-service options, and direct chats to the appropriate agents. With our dependable, auto-scaling APIs, you can quickly get started with extensive documentation, comprehensive API references, and user-friendly SDKs at your disposal. Experience the power of streamlined communication and watch your business thrive.

Innoinstant provides a customized communication solution that can be used across all platforms and devices. Establish a white-labeled communication app for reliability, security, and scaling. You can create custom APIs and SDKs to ensure real-time communication in any industry or use case. 100% customizations allow for lag-free virtual classrooms and secure financial transactions. Interactive video and text chats are also possible on live streams. Gaming, E-Commerce and dating are all possible. Industry-standard security, encryption and signal protocol. Secure and protect user communications with end-to-end encryption. Our SDKs and APIs are powerful tools that enable effective communication via chat, voice, or video. Communication is easy with file sharing, screen recording and robust payment gateway. You can also make unlimited calls and translate words into business. The application development process is completely customized to meet the needs of every industry and works on any device or platform.

Boost engagement, retention, and revenue in-app. Add pre-built features for social and community to your app. Collect data from the first party and unlock AI insights to drive app development. Add social features to an app in a matter of days. Our ready-to-use SDKs and APIs allow you to embed the most popular features of social media into your app or website. AI can be used to unlock new growth potentials and enhance your business strategy by leveraging your first-party data. Native monetization can maximize your app's revenue while improving the user experience.

CometChat is a live chat platform that allows users to collaborate and connect with customers. Developed with API and Chat SDK, CometChat can be deployed on-premise and cloud. The solution enables users to video, text and voice chat with the customers, share pictures via broadcast videos, play games and use whiteboards. Primary features of CometChat include WebRTC, file sharing, screen sharing, real-time language translation, customization for layouts, languages and colors, typing indicators, last-seen notifications, read receipts, emojis and stickers. The platform also allows users to switch from text chatting to a video chatting interface. Additional services of CometChat include broadcast messages, guest login support, earlier messages, blocking or unblocking users, video broadcasting and voice notes. Pricing of the product is based on monthly active users and support is extended via email and phone.

Ably is the definitive realtime experience platform. We power more WebSocket connections than any other pub/sub platform, serving over a billion devices monthly. Businesses trust us with their critical applications like chat, notifications and broadcast - reliably, securely and at serious scale.

ApiRTC serves as a developer-friendly library designed to seamlessly embed real-time communications, such as chat, audio, and video, into both web and mobile applications. Utilizing WebRTC technology, it ensures that media streams are encrypted and ideally transmitted through peer-to-peer connections; however, if necessary, a media relay via a TURN server can be employed. Acting as the central hub of our platform, ApiRTC handles the establishment of all user connections, presence tracking, and media setup. The library is offered in various formats to cater to different integration needs, whether for web applications, hybrid apps using JavaScript, or native applications developed for iOS and Android platforms. Furthermore, Apizee's solutions for audio and video communication are built on the WebRTC standard, which is increasingly supported by a wide range of internet browsers. This growing compatibility not only enhances the functionality of our solutions but also ensures that users can access audio and video streaming across most PCs, tablets, and smartphones, thereby significantly broadening the reach of our communications tools. Additionally, developers can leverage the flexibility of ApiRTC for a variety of use cases, making it an invaluable asset for modern application development.

Headquartered in Silicon Valley, Gupshup is a leading conversational messaging platform that enables businesses to build engaging conversational experiences seamlessly across 30+ messaging channels using a single API. Gupshup offers an easy-to-use omnichannel messaging API, advanced bot-building platform and mobile marketing tools. Gupshup's messaging platform handles over 6 billion messages per month enabling over 39,600 businesses send messages to several billion users across popular messaging channels such as SMS, Voice, WhatsApp, Mobile Web, Android RCS, Instagram, Twitter, Telegram, WeChat, FB Messenger, Slack, Viber, Skype and many more. Our Single API solution for 30+ messaging channels has enabled businesses to easily integrate 1-way and 2-way messaging on WhatsApp with fall back to SMS connectivity in over 225 countries with multi-channel auto routing option. Additionally, Gupshup Bot platform supports over 36,000 bots and can easily handle WhatsApp FAQ Bots with live agent handoff for various customer support use cases

Twilio's Messaging API is an essential tool for businesses looking to integrate messaging capabilities into their applications with ease. It provides a reliable RESTful API that facilitates the sending and receiving of SMS, MMS, and WhatsApp messages on a global scale. This API allows businesses to automate and scale their communications, ensuring that messages reach customers through their preferred channels. With support for various sender types, such as long codes, short codes, toll-free numbers, and alphanumeric sender IDs, Twilio offers flexibility in message delivery. The Messaging Services feature further enhances this by enabling the grouping of global senders and intelligent sending, which automates sender selection and manages compliance regulations. Additionally, the API supports inbound webhooks, allowing businesses to handle responses programmatically and engage in two-way conversations with customers. Twilio's comprehensive documentation, sandbox testing, and robust support empower businesses to create efficient, scalable, and compliant messaging solutions that enhance customer engagement and drive conversions.

A Live Video Commerce enabler, Channelize.io enables E-Commerce Brands to offer live shopping experiences on their websites and mobile apps. Our Platform can be easily integrated within existing websites and apps with Pre-built integrations for Shopify, WooCommerce, Magento, PrestaShop, Wix, and more, and via our API, SDKs, and UI Kits. Channelize.io Livestream Shopping Platform gives brands the opportunity to leverage the power of Live Selling and Real-time Buyer Engagement to Boost Sales and Enhance their Brand Perception by connecting better with their Buyers and Showcasing their products. This ultimately leads to Informed, Trusted, and Accelerated Purchases by buyers. Our Platform includes three components: Buyer Interfaces: For Buyers to Engage & Shop from in Real-time Production Dashboard: For Brand Admins to Create & Manage Shopping Shows Host Apps + RTMP Support: Enables Hosts / Influencers / KOLs / Brand Employees / Anyone you choose as Host for each show to go live and run that Live Shopping Show effectively. Please Book a Demo with us to see our Platform in action.

With over 700 direct carrier connections and 60+ offices on 6 continents, Infobip is a global leader in omnichannel communication. We make it our business to simplify how brands connect with, engage and delight their customers at global scale. Our programmable communications platform delivers a suite of tools for advanced customer engagement and support, plus security and authentication. We make this available to you across the widest range of communication channels possible. THE INFOBIP ADVANTAGE (1) Personalized omnichannel customer connections Achieve deeper customer engagement across the widest selection of local and global channels, including: SMS, RCS, WhatsApp, voice, video, email and the most popular chat apps. (2) Global reach, local presence Our 60+ offices around the world allow us to react faster. We provide 24/7 customer support, technical solutions in-line with needs and local requirements — based on proven best practices. (3) Full stack customer engagement Deliver better outcomes for your business by enhancing your communications with fully integrated contact center, marketing automation, and chatbot building solutions informed by our customer data platform.

TalkJS is a fully-featured chat API that you can add to any website or mobile app. It has a fully-featured chat UI that works with any language or framework. In just a few hours, you can have a chat solution ready and running. Javascript SDK Integrate two-way chat seamlessly with talk.js, our instant messaging infrastructure and our amazing UI. Fully featured All you need in a messaging app. Reliable and scalable. Real-time, cross-platform synchronization. Ship faster Turn any<div>You can turn it into a fully-fledged messaging application. In 10 minutes, you can be up and running. Works with your framework/programming language Your TalkJS code will be located in the frontend. This means it will seamlessly integrate with any language or framework. This includes React and jQuery, Angular and VueJS. PHP, Ruby on Rails. Python, Django, ASP.NET MVC..NET Java, NodeJS, etc.</div>

If you seek top-notch voice, messaging, and additional features, it’s essential to select an API provider that operates its own nationwide network. By cutting out intermediaries, you can reduce expenses, enhance your control, and create the application that your users truly desire. While you may already have experience in this field, a reliable partner is crucial to help you achieve the growth you aspire to. Whether you opt to utilize your own carrier or develop a completely new solution, Bandwidth equips you with the necessary tools to unlock your full potential. Serving as a versatile communications platform, Bandwidth offers extensive flexibility for your needs. You require seamless integrations, robust enterprise-level APIs, and intelligent tools to effectively manage your communication system. We prioritize openness in the areas that matter most to you, providing you with options and control over your operations. Our extensive global network ensures direct connections where it counts, delivering unparalleled reliability. Ultimately, this approach fosters stronger relationships with your customers while allowing your business to scale seamlessly in any direction you choose. Additionally, Bandwidth's commitment to innovation ensures that you are always equipped with the latest advancements in communication technology.

Mesibo serves as a robust real-time communication platform that enables the seamless integration of messaging, group chats, voice calls, and video conferencing into both mobile and web applications. When developing the Mesibo APIs, our primary focus was on ensuring reliability, performance, and scalability, as we recognized that overly complex APIs can lead to unnecessary complications and increased error rates in applications. Rather than following the trend of convoluted API designs, we have prioritized simplicity while maintaining powerful capabilities. In this section, we will delve into the intricacies of Mesibo's real-time APIs. It is advisable to check out the source code of one of the sample applications available on GitHub to gain insights into how these APIs are effectively utilized. This approach will facilitate your ability to write cross-platform code seamlessly. In the subsequent sections, we will outline the APIs along with their respective names and parameters, providing you with a comprehensive understanding of their functionality. Additionally, this will empower you to implement the APIs more effectively in your projects.

Sunshine Conversations serves as a messaging platform designed for business communication, enabling users to consolidate messages from various channels into a cohesive conversation while also facilitating the creation of interactive messaging experiences across multiple platforms. The landscape of communication has undergone a significant transformation, with messaging applications such as Facebook Messenger, WhatsApp, and WeChat amassing over 5 billion accounts globally, allowing individuals to connect more intimately with loved ones regardless of geographical barriers. Businesses recognize the necessity of engaging with their customers through the channels they prefer. However, the increasing variety of communication platforms and the rapid pace of technological advancements have made it increasingly challenging to oversee interactions across these diverse channels. As bots, artificial intelligence, and interactive features gain prominence in messaging, these platforms are swiftly transitioning from simple communication tools to essential business environments. This evolution highlights the critical need for businesses to adapt and evolve their communication strategies in order to thrive in a rapidly changing digital landscape.

Streamlined SaaS App Integrations Made Effortless. Kloudless is an advanced API integration platform that consolidates endpoints and data structures from various SaaS APIs, allowing you to write code just once and seamlessly connect your application with multiple SaaS providers. We have navigated the complexities of over 150 APIs on your behalf. Our expertise in communicating with and managing these numerous APIs means you can focus on your core product. Collaborate with us to ensure your application can connect with any SaaS solution your customers desire. Our Unified APIs simplify the integration process by harmonizing endpoints and data models from various SaaS APIs, enabling you to code once and integrate many. By abstracting the differences among numerous SaaS APIs, our Unified APIs facilitate rapid integration development, helping you bring new features to market faster. Additionally, we provide valuable features such as real-time activity monitoring and pre-built tools like the File Picker and Crawler, which are not always available from the SaaS providers themselves, further enhancing your integration capabilities. With Kloudless, you can maximize efficiency and deliver exceptional value to your users.

Enhance customer engagement on a large scale through SMS, chat applications, and voice and video APIs. With industry-standard APIs, automating notifications is a breeze, allowing businesses to communicate effectively. Our 24/7 customer support guarantees that expert assistance is available whenever it's needed. Enjoy reliable delivery thanks to our robust, global platform that collaborates with numerous carriers. You can connect with customers globally, reaching 190 countries and 130 network operators effortlessly. Deliver a range of messages, such as notifications, one-time passwords, reminders, and alerts, reliably to your audience. Expand your reach by sending messages across various platforms using a single API. Access live support with just a click, and leverage text-to-speech capabilities to generate customized, private messages at scale through this API. The Campaign Manager is designed to help you launch SMS campaigns instantly without the need for complex API integration. Simply access the online portal, upload your approved contacts, and begin your communication journey effectively. With these tools, you can streamline your outreach processes and significantly enhance your customer interactions.

The industry's only serverless platform for voice and video and messaging APIs. Trusted by thousands of developers all over the globe to scale real-time communications for any business.

Billions of people. Trillions of connections. One API. The Nylas APIs are powering applications with email, calendar and contacts that sync from any inbox around the globe. Nylas is the only company that provides an API for all email, calendar and contacts integrations. Contact records can be updated with missing information. A connection graph can make intros more warm. To create a single data source, combine data from each address book.

Aculab Cloud offers robust, programmable APIs that are simple to integrate, enabling users to make and receive voice calls, send and receive SMS messages, and manage inbound and outbound fax services, all on a pay-as-you-go basis without the need for specialized telephony hardware. This platform leverages Aculab's expertise by merging intricate technologies into a user-friendly and adaptable system. Supported by a talented team of seasoned engineers, Aculab supports communication system developers globally. In partnership with tech giants like Google and Amazon, we deliver services, systems, and software that are already operational in over 80 countries around the globe. Our platforms utilize proprietary Artificial Intelligence (AI) alongside meticulously crafted algorithms that have been honed through vast real-world telecommunications experience. Each component is developed internally by engineers with a profound knowledge of the telecommunications sector, ensuring innovative solutions that meet diverse communication needs. Furthermore, our commitment to continuous improvement keeps us at the forefront of the industry.

Enhance your service by incorporating cloud-based voice and video capabilities into your current offerings. Discover how iotum's ready-to-use APIs and SDKs facilitate interactive experiences within your application, website, or platform. By adopting this technology, you can nurture stronger customer connections through their preferred communication channels. Interact with your audience in real-time, regardless of their location or the platform they are using, by integrating video and voice through iotum’s robust API and SDK solutions. The use of the VP9-SVC codec—one of the latest advancements in video technology—ensures reduced bandwidth consumption while still delivering exceptional video quality, even in less-than-ideal internet conditions. With a globally distributed network of media servers, iotum maintains low latency connections, guaranteeing that all users enjoy a clear communication experience. Additionally, iotum provides a suite of collaborative tools like annotation, whiteboards, laser pointers, and instant chat, available a-la-carte, allowing your developers to focus on other critical tasks instead of building these features from scratch. This comprehensive approach not only improves user experience but also saves significant development time and resources.

UIB is a pioneering company that leverages artificial intelligence and prioritizes API functionality to enhance communication between humans and machines, striving to make these interactions as intuitive as those between people. Their innovative platform integrates a wide array of communication channels, AI technologies, and various connectors, including SaaS and IoT APIs, creating an endlessly scalable solution that simplifies the process of launching products. Among UIB's key offerings is the UnificationEngine, which serves as an omnichannel Messaging Service Platform (MSP) that allows users to access diverse communication services through a single, cohesive API equipped with over 50 connectors. Additionally, UIB provides Unified AI, a customizable chatbot creation tool and virtual assistant framework that facilitates content management and conversation insights across multiple languages and media formats. Furthermore, the H2X Exchange acts as a marketplace for cloud connectors, robotic process automation, and IoT integrations, fostering comprehensive interactions across all conversational user interfaces, ultimately enhancing user experience and engagement. Together, these innovations position UIB as a leader in the space of seamless human-machine communication.

Crafting Customer Journeys Through Meaningful Conversations. Delivering compelling experiences that align with your customers' needs. Favored by developers and designed for enterprises. Vonage Communications APIs (previously known as Nexmo) empowers emerging startups and nimble organizations to elevate customer interactions and achieve significant business results at scale. With our user-friendly APIs, comprehensive global platform, and dedicated support, you can simplify communication complexities and drive innovation at a quicker pace. Rethink voice communication to transform how your customers engage with your brand. Each message can become a pivotal moment for both your customers and your organization. Advance security and privacy measures while providing smooth login experiences. Develop contemporary, high-quality voice applications hosted in the cloud. Effortlessly send and receive SMS messages in nearly every nation worldwide. Access real-time insights on any phone number across the globe. Initiate and receive calls using your current VoIP system, all from the cloud, ensuring flexibility and efficiency. This holistic approach not only enhances user engagement but also fosters long-term relationships with your audience.

Developing a messaging application similar to WhatsApp, Facebook Messenger, or Signal is simplified with the help of Chat SDK. This toolkit allows users to effortlessly integrate chat features into both mobile and desktop platforms. The Armia chat SDK library for React Native provides essential components to create an interactive chat experience, accommodating both individual and group conversations. Users are able to send audio and video messages and share photos and files seamlessly. Leveraging Firebase for backend services enhances its functionality. By downloading the FREE SDK, developers can significantly reduce project development time and streamline their workflow. With its user-friendly interface and comprehensive features, Chat SDK makes building a robust messaging platform more accessible than ever.