Sendbird

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Sendbird is an omnichannel AI agent platform for customer service, built on top of the communications infrastructure that already powers in app chat, voice, and video for thousands of the world's largest apps. Founded in 2013 in San Mateo by John Kim, Harry Kim, Brandon Jeon, and Forest Lee, and shaped in Y Combinator, the company pivoted from a social app for parents into a developer chat API and raised about two hundred twenty million dollars, reaching a one billion dollar valuation with its one hundred million dollar Series C in March 2021 led by ICONIQ, alongside SoftBank Vision Fund, Tiger Global, and Y Combinator. Its infrastructure routes billions of messages a month across more than four thousand applications including DoorDash, Match Group, and Noom. In November 2025 Sendbird launched Delight.ai, a strategic pivot from communications plumbing to AI agents that resolve customer issues rather than just carry messages. The platform deploys personal AI agents across chat, voice, SMS, email, and social, and its central bet is persistent long term memory that carries context across every interaction instead of the reactive one shot behavior of a typical chatbot. AI Concierge and Omnipresent AI meet customers wherever they are, a Voice AI Agent handles spoken conversations, AI Agent Integrations wire agents into existing systems, and Agent Steward, added in May 2026, drives autonomous issue resolution end to end. Because Sendbird grew up as a developer platform, it brings deep extensibility, with communication APIs and cross platform SDKs for iOS, Android, JavaScript, React Native, and Unity, plus HIPAA compliance for regulated apps. The agent layer is new, so some governance and evaluation tooling is still maturing relative to its mature messaging core. For a product or support team that already thinks in APIs and wants AI agents embedded natively across every channel with real memory, Sendbird is a strong option; a small team wanting a turnkey help desk without engineering involvement may find a packaged support tool simpler.