Future-proof your messaging

One API for the world’s major messaging channels

Sinch Conversation API lets you connect to 14 popular messaging channels with a single integration. Manage all your messaging from one place for one- and two-way conversations without vendor sprawl.

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WHY CONVERSATION API IS GREAT

Build stronger customer relationships with messaging

Conversation API brings all your channels together, so you can launch, manage, and scale messages across 14 channels without dealing with multiple integrations.

Speed up delivery

Add new messaging channels in minutes or days instead of months. One integration removes up-front heavy lifting and ongoing upkeep.

Boost engagement

Reach people where they are with SMS, WhatsApp, RCS, and more. Interactive messages lead to better results and happier customers.

Expand reach

Expand globally without adding complexity. Support multiple channels, regions, and message types through one integration that stays stable as your needs grow.
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ACCELERATE DEVELOPMENT

Cut complexity and move faster

Managing separate channel integrations takes time and resources. With Conversation API, a single unified API streamlines setup, testing, and upkeep so teams can focus on creating great customer experiences.

  • One integration for 14 channels

  • Automatic transcoding per channel

  • Fewer upkeep cycles and lower total cost

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Sinch Smart Conversations

Add AI-powered understanding to every message

With Smart Conversations, Conversation API can analyze intent, sentiment, and images to give your systems the context they need to respond intelligently.

  • Identifies intent and sentiment in real time, powering smarter automation and faster resolutions

  • Sensitive PII is automatically detected and masked to keep customer data secure

  • Abusive or harmful language is instantly identified so your teams stay protected

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GLOBAL SCALE & RELIABILITY

Build once and scale everywhere

Conversation API powers billions of interactions on Sinch’s enterprise grade network. Automatic fallback makes sure messages get through to customers.

  • 600+ direct operator connections

  • Verified sender identities and GDPR compliance

  • Built-in automatic fallback for delivery success

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Supported Channels

Connect to 14 messaging channels

Reach any customer, anywhere, with the widest channel offering on the market from Sinch. If a channel goes down, automatic fallbacks keep your messages moving over a different channel.

  • Reach customers on 14 messaging channels, including SMS, RCS, WhatsApp, Facebook Messenger, and more

  • Set up automatic fallback without extra development work

  • Stay on top of emerging channels—no new integrations required

BUSINESS IMPACT

Where Conversation API shines

Marketing campaigns

Run interactive promotions on WhatsApp, RCS, and Messenger to capture attention, boost engagement, and drive conversions.

Customer updates

Keep customers in the loop with order confirmations, shipping alerts, and appointment reminders across channels to reduce support calls.

Customer service

Offer two-way conversational support with AI chatbots and easy agent handover, improving customer satisfaction and agent efficiency.

Identity & verification

Deliver secure OTPs and authentication messages with verified sender identities to protect users and prevent fraud.

BUILT FOR SCALE

Powerful features your team will love

Smart Conversations

Built-in AI understands messages and images to automate tasks, enhance security, and improve customer experiences.

Unified Contact Memory

Keep all your customer conversations in one place, no matter what channel, with one connected view.

Projects and Apps

Organize your contacts and apps under one project with shared access keys for easy management.

Channel Priority and Fallback

Maximize delivery by rerouting messages to the best available channel when the preferred one doesn’t work.

Omnimessage Templates

Create pre-formatted, reusable messages you can send across any supported channel with templates.

Message Batching and Scheduling

Send messages to multiple people at the same time or schedule them to deliver at specific times.

Consent Management

Manage opt-ins, preferences, and compliance requirements in one place to meet global regulations.

Intelligent Routing and Webhooks

Developer-friendly REST architecture with real-time webhooks for inbound messages and status updates.

Channel Message Templates

Save time with pre-defined and reusable SMS and rich media messages across channels with dynamic content.

Analytics

Track message counts, channel breakdowns, top-country reports, and more, or export data for deeper insights.

Channels

Reach customers on SMS, WhatsApp, Instagram and many more, all from one API.

Conversation API FAQs

Sinch Conversation API is a unified messaging API that lets businesses connect to 14 messaging channels through a single integration, simplifying omnichannel communication and reducing development complexity.

Businesses with high volume or complex messaging needs find the simplicity and cost saving of the Sinch Conversation API especially useful, specifically in industries like:

• Software platforms & application service providers (ASPs) that provide software solutions (like CRM, marketing automation, or helpdesk platforms) and want to embed omnichannel communication capabilities directly into their products.

• Retail & e-commerce businesses sending order confirmations, shipping updates, and promotional campaigns.

• Financial services & banking institutions that require secure identity verification, transaction alerts, and conversational customer service.

• Healthcare providers who rely on appointment reminders, share test results securely, and patient support messaging.

• Travel & hospitality companies sending booking confirmations, travel updates, and promotional offers.

The API can be configured with channel-specific failover logic. If a WhatsApp message can’t be delivered, it can automatically resend as an SMS.

Sign up for a free account to test the Conversation API in the Sinch Build dashboard.

Once you’re signed up, you can create a project, obtain API credentials, configure your first channel, and make your first API call. You’ll need a Sinch account, API credentials, REST-capable development resources, and a server endpoint to receive webhook events to get started.

You can connect to 14 messaging channels, including WhatsApp, RCS, SMS, Facebook Messenger, and more, all through one unified API.

Yes, Conversation API supports verified sender identities, global compliance standards including GDPR, and secure message delivery.

Talk to an expert about Conversation API

Learn how you can simplify your workflows, reduce costs, and boost engagement when you send messages with Sinch Conversation API.