Communication APIs companies

Knock provides a developer-first platform for teams to send cross-channel notifications and messages without building their own infrastructure.

AgentMail is an API-first email platform that provides AI agents with dedicated inboxes, offering programmatic email infrastructure for autonomous AI systems.

LiveKit is an open source developer platform for building real-time voice, video, and physical AI agent applications, serving over 200,000 developers and poweri…

Nango is an open-source platform for building product integrations with AI, supporting 800+ APIs and handling OAuth, token refresh, rate-limiting, and other int…

Vapi is a developer platform and API for building voice AI agents, combining speech-to-text, large language models, and text-to-speech into a unified system.

Unifonic is a Middle Eastern customer engagement platform providing omnichannel communication infrastructure, handling over 10 billion annual transactions for b…