What is Sendbird?
Sendbird is a communication API platform that provides real-time messaging, voice, and video infrastructure for applications. Rather than building chat from scratch, product teams integrate Sendbird's API and SDK to add fully featured messaging to their product in days rather than months.
The platform handles delivery, storage, moderation, and scaling, allowing developers to focus on product experience rather than infrastructure. Sendbird powers over 7 billion conversations per month across 4,000 applications including DoorDash, Match Group, Noom, and Yahoo Sports.
The platform targets product and engineering teams building applications where in-app communication is a core feature rather than a support tool.
Marketplace applications where buyers and sellers need to coordinate, healthcare platforms where patients and providers communicate, and social or gaming applications where community interaction drives engagement all rely on chat infrastructure that is too complex to build well in-house.
Sendbird's managed API handles the complexity of real-time delivery, read receipts, push notifications, and message history at scale.
Sendbird introduced its Trust OS in 2026, which adds observability and accountability infrastructure for AI agents built on top of the messaging layer.
As AI agents increasingly handle customer service and sales conversations through chat interfaces, Trust OS provides the logging, auditing, and reliability layer that enterprise deployments require. This positions Sendbird beyond a pure messaging API into AI-native communication infrastructure.
Pricing is based on monthly active users, with a free tier available for up to 1,000 MAU. This makes the platform accessible for early-stage products that want production-grade chat infrastructure without upfront cost.
Key Features
✓Real-Time Messaging Api With One-To-One, Group Chat, And Open Channel Support
✓Voice And Video Communication In Addition To Text And Multimedia Messaging
✓Trust Os For Ai Agent Observability And Accountability In Communication Layers
✓Free Tier For Up To 1,000 Monthly Active Users For Development And Small-Scale Deployment
✓Advanced Moderation With Automated Filtering, User Bans, And Role-Based Access Controls
✓Push Notification Delivery For Mobile And Web Messaging Applications
✓Trusted By 4000 Plus Apps Powering 7 Billion Conversations Per Month
✓Sdk Support For Ios, Android, React Native, Flutter, And Web
Who is Sendbird for?
→Product teams adding real-time in-app messaging to marketplaces or social applications
→Healthcare and fintech platforms where secure in-app communication is a compliance requirement
→Gaming and community apps where real-time chat is central to the product experience
→Engineering teams that want production-grade chat infrastructure without building it from scratch
→Enterprise teams deploying AI agents that need observable and auditable communication layers
Frequently Asked Questions
What does Sendbird provide and how does the API work?
Sendbird provides a chat and messaging API that developers integrate into their application via SDK. Once integrated, the application can support one-to-one messaging, group chats, channels, and multimedia messaging without building the real-time delivery, storage, or push notification infrastructure in-house. Sendbird handles scaling, moderation tools, and message history, and developers access these capabilities through the API rather than maintaining backend infrastructure.
How much does Sendbird cost for a growing app?
Sendbird pricing is based on monthly active users with a free tier available for up to 1,000 MAU. Paid plans scale with user volume. Enterprise features and high concurrent connection requirements carry additional costs. The platform charges approximately $5 per additional concurrent connection, which can increase costs significantly during usage spikes. Startups and consumer apps with unpredictable traffic should model their expected MAU and peak concurrent usage carefully to estimate total cost before committing.
Sendbird vs Twilio which is better for in-app messaging?
Twilio is a broader communications platform covering SMS, voice, email, and video alongside chat, with flexible pricing and a large developer ecosystem. Sendbird is purpose-built for in-app chat with richer features for social and marketplace applications like channels, reactions, threaded messages, and moderation. Sendbird is the better choice when in-app messaging is a core product feature that requires the full feature set. Twilio is the better choice when chat is one of several communication channels needed alongside SMS and voice.
What is Sendbird Trust OS and how does it work with AI agents?
Trust OS is Sendbird's AI agent reliability and observability layer introduced in 2026. It provides logging, auditing, and accountability infrastructure for AI agents that interact with users through the Sendbird messaging layer. As AI agents handle more customer service and sales conversations, Trust OS gives enterprise teams visibility into what agents said, when, and under what conditions, which is required for compliance and quality assurance in regulated or high-stakes communication contexts.
Which companies use Sendbird in production?
Sendbird is used by DoorDash, Match Group, Noom, Yahoo Sports, and over 4,000 other applications. These span marketplace, health, social, and media categories. The diversity of use cases reflects Sendbird's positioning as general-purpose in-app communication infrastructure applicable across product types that need real-time messaging at scale.
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