Messaging SDK and Chat API for Mobile Apps and Websites. Enable in-app messaging for your mobile apps and websites using SendBird messaging SDK and chat API. Auto Partitioning Automatically split or merge chat rooms based on the audience volume to maintain steady level of engagement. Smart Throttling Help the audience follow the conversations by throttling the speed of messages displayed on the screens. Scalability for Massive Audience Host over 100,000 concurrent chat participants per channel for live-videos and events.