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Build with Sinch APIs

Reach any handset on the planet with our enterprise-grade APIs and SDKs

Reliably message, email, call, or verify your customers with infrastructure built for scale.

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Over 150,000 business, including 8 out of the 10 largest tech companies in the world, build with Sinch

Communication API provider

Build and configure the exact API setup you need for communication

Messaging APIs

Quickly deliver any number of messages across the messaging channel of your choice. We offer SMS, RCS, WhatsApp, Facebook Messenger, and more.
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Email APIs

Send transactional and marketing emails with ease. Sinch Mailgun offers everything you need to send, receive, track, and optimize your email efforts.
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Verification API

Secure accounts and improve user experience with SMS, phone calls, or seamless no-click methods such as flash call and data verification.
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Voice & Video APIs

Easily add voice or video capabilities to your app with our versatile APIs. From number masking to text-to-speech alerts, we have you covered.
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How Avtal increased recovery rates by more than 50% with SMS and email

“Sinch’s tech is really well built out, there's a ton of documentation that makes it friendly for our engineering team. And then on the support side, we get amazingly quick responses.“
50-70%
Rise in recovery rates
7M+
Monthly messages
Khaled Bitar CEO of Avtal
Read the customer story
How Avtal increased recovery rates by 50% with SMS and email

Messaging APIs

Easily integrate messaging into any application

Our Messaging APIs are powered by an intelligent, low-latency network that sends 250B messages per year. Reach any phone in the world, stay compliant, and protect your customers inbox from spam and fraud.

  • Carrier-grade SMS and MMS APIs make it easy for you to integrate one of the most powerful communications channels into your application.

  • Future-proof your communications with a single API for 13 messaging channels.

  • Enjoy higher quality, faster speeds, and greater security with no middlemen.

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Send personalized alerts or reminders

Keep customers in-the-loop about upcoming appointments and deliveries by messaging them on the channel of their choice.

Drive sales with promotions

Use targeted messages to promote your latest offers, driving customer engagement and increasing sales.

Improve customer experience

Enable seamless, two-way interactions with your customers for better support, sales, and lead generation.

Messaging APIs

Every messaging channel you need in one place

SMS

Take advantage of one of the most popular, powerful messaging channels.
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MMS

Enhance your texts with pictures and media that set your brand apart.
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RCS

Provide an app-like experience within the SMS inbox.
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WhatsApp

Automate chats and enrich customer journeys with WhatsApp.
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Facebook Messenger

Connect with over 1 billion users on Facebook Messenger for Business.
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Instagram

Enable real-time conversational commerce on Instagram.
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Viber

Easily communicate with key audiences through Viber Business Messaging.
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Telegram

Messages your customers securely on Telegram.
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KakaoTalk

Reach customers in South Korea with KakaoTalk for promotions and support.
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LINE

Engage users in Japan, Thailand, Taiwan, and Indonesia through LINE.
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WeChat

Connect with customers in China using their favorite app, WeChat.
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Sinch Chat

Chat live with customers on your mobile app and website.
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Sinch Push

Send timely web, mobile, and in-app push notifications.
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View all channels

Email APIs

Send, track, and optimize emails with ease, even in the millions

With Sinch Mailgun, our Email API, you can integrate powerful email functionalities into your system with industry-leading reliability, compliance, and speed.

  • Whether you prefer SMTP or RESTful API, you can send as many messages as you need with Sinch Mailgun.

  • Our deliverability tools and services can help you reach more inboxes and optimize your strategy.

  • Quickly clean your list and save money with the fastest email validation service on the market.

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Secure, compliant infrastructure

Sinch Mailgun is SOC types I & II certified, GDPR compliant, HIPAA compliant, and ISO 27001 certified.

We can handle any scale

Easy enough for startups, robust enough for global companies. Our SLA includes 25 million messages every 5 minutes.

By developers, for developers

Our APIs and SDKs have clear documentation so you can integrate quickly and start sending emails in minutes.

Verification API

Protect your customers with our flexible Verification API

Make your sign-up, log-in, and password reset processes smooth, while moving the needle on cost and security. Experience the convenience of multiple phone number verification methods under one API.

  • Send one-time passwords (OTP) via SMS, voice call, or WhatsApp.

  • Verify users in seconds with the cost-efficient Flash Call. 

  • Offer no PIN, zero-click verification that customers love with data verification.

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Keep customer accounts secure

Add an additional layer of security to your app that doesn’t get in the way of user experience.

Save money without comprising security

Deploy the most cost-effective methods across different regions. With Flash Call, you can save up to 50% compared to SMS OTP.

Increase conversions

Remove friction from your user onboarding with our quick, reliable verification processes that increase conversions.

Voice and video APIs

Boost the voice capabilities of your product or calling systems

Create seamless in-app voice or video calling experiences. With the largest owned network in the nation and regional cloud deployments, you can call anyone in the world.

  • Choose from over 140,000 million phone numbers. We have the largest inventory of any CPaaS

  • Reduce costs and get worldwide coverage with our scalable Elastic SIP trunking service 

  • Design the exact voice call flow you need with inbound and outbound IVR 

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Implement anonymous calling

Ensure privacy between end users by masking their personal phone numbers during two-way calls.

Improve customer satisfaction

Gather feedback or route calls to the right department with our IVR templates or self-serve flows.

Send important alerts

Use text-to-speech to keep your customers informed about outages, billing issues, or other critical info.

Frequently asked questions

You can always contact us to get started or use one of our builder-friendly options. Sign up to Sinch Build and you'll get trial credit, a default project, and API keys the moment your account is created, with no credit card required.

Or, if you already code with an AI assistant, use Sinch Agent Tools to connect tools like Cursor, Claude Code, and VS Code straight to Sinch APIs.

Sinch has a suite of Agent Tools for Coding that work with any MCP-compatible or SKILL.md-compatible tool, including Claude Code, Cursor, Gemini CLI, GitHub Copilot, Codex, and Windsurf.

You'll find ready-made plugins in the VS Code Marketplace, JetBrains Marketplace, Open VSX Registry, and Cursor Marketplace, plus the sinch-plugins GitHub repo for Claude Code and Gemini CLI. 

Explore Sinch Agent Tools