Sinch is a communications platform as a service (CPaaS) provider that helps businesses build, automate, and manage customer interactions across messaging, email, and voice channels. The platform offers APIs for SMS, MMS, RCS, WhatsApp, Facebook Messenger, Instagram, Telegram, and other communication services. Its Conversation API enables developers to manage one-way and two-way conversations across multiple messaging channels through a single integration. Sinch Engage provides a multichannel messaging application for creating marketing campaigns, sending notifications, managing customer conversations, and automating follow-ups. Email solutions such as Sinch Mailgun and Sinch Mailjet support transactional email delivery, marketing campaigns, email analytics, and deliverability management. Voice capabilities include programmable calling, interactive voice response, text-to-speech notifications, number masking, and SIP trunking. The Verification API helps organizations authenticate users through SMS one-time passwords, voice calls, flash calls, and other verification methods. AI-powered products include Sinch Chatlayer for building conversational chatbots and Sinch Contact Pro for managing omnichannel customer service operations. Sinch provides global network connectivity, developer SDKs, delivery monitoring, compliance features, and integrations for organizations requiring scalable customer communications.