INTERNATIONAL SMS API

International SMS gateway with a developer-friendly API

Send and receive SMS messages around the world through a single API, built on a direct-to-carrier network for unmatched quality and reliability. Get low latency and high deliverability with our direct-to-carrier Super Network.

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Join over 190,000 businesses, including 8 of the 10 largest tech companies in the world

WHAT SETS SINCH APART

Boost ROI, reliability, and reach with our Super Network

With over 600 direct-to-carrier connections, our enterprise-grade security and single REST API help you reduce Total Cost of Ownership (TCO), meet compliance, and scale without the hassle of adding new vendors. It’s simple with our international SMS gateway and API that simplifies global messaging.

Reduce total cost

Cut aggregator fees and only pay for what you use with pay-as-you-go pricing and volume discounts.

Enterprise security

We’re ISO 27001 certified and GDPR compliant with tools for consent management, data handling, and message redaction.

Global scale fast

One API taps 600+ direct carrier connections to reach customers in 190+ countries so you can start sending in minutes.

IMPROVE YOUR ROI

Direct routes to help you lower your TCO and boost deliverability

Hidden fees and multi-hop paths destroy budgets and results. Our 600+ direct carrier connections boost delivery rates and reduce TCO with transparent, pay-as-you-go pricing.

  • Boost delivery rates through direct-to-carrier quality

  • Cut hidden aggregator fees from your budget

  • Volume discounts scale with your growth

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DELIVER CONFIDENTLY

Enterprise-grade security and quality you can trust

Poor quality and slow delivery harm customer relationships. Sinch’s ISO 27001 certification, GDPR compliance, and real-time DLRs, you can trust every message to arrive quickly and securely.

  • ISO 27001 certified and GDPR compliant

  • Message redaction and regional data controls

  • Real-time callbacks confirm successful delivery

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SCALE WITHOUT COMPLEXITY

Reach 190+ countries through our international SMS gateway

Growing your business shouldn’t mean adding vendors. Our single REST API has 600+ carrier connections so you scale globally without adding extra integration work.

  • One API covers short codes, long numbers, and toll-free

  • Expert guidance on regional regulations

  • 99.95% SMS uptime commitment across the globe

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KEY FEATURES

Everything you need in one international SMS API

Our transactional SMS service includes the tools teams need to deliver fast, secure, and reliable notifications.

Two-way messaging

Send and receive SMS for 
real-time, conversational engagement.

Global coverage and local numbers

Access short codes, long numbers, alpha-numeric, and toll-free options worldwide.

Delivery reports

Get instant delivery status through callbacks to monitor performance.

Number pooling

Spread traffic across multiple numbers to boost throughput and make sure messages get delivered.

Automatic encoding

Support every character set—including emojis—without extra work.

Message redaction

Automatically remove sensitive data to meet global security standards.

Direct-to-carrier network

Access 600+ direct connections for unmatched quality and low latency.

Low-latency delivery

Our programmable REST API is optimized for rapid two-way SMS delivery.

TOP USE CASES

Power every critical SMS moment

Transactional alerts and notifications

Send OTPs, fraud alerts, and shipping updates worldwide with low latency and reliable delivery.

Marketing and promotional campaigns

Connect with audiences worldwide, delivering personalized offers and updates that drive conversions.

Two-factor authentication (2FA)

Protect user accounts by sending verification codes instantly and securely no matter where your users are.

Customer service communications

Build two-way SMS for timely, global customer support that customers love to boost loyalty.

Frequently asked questions

An international SMS API is a programmable interface that lets your application send and receive text messages worldwide via one REST API.

A direct-to-carrier network is more reliable, secure, and cost-effective. Unlike multi-hop paths that can slow things down, direct connections boost message quality and keep costs lower.

Pricing is pay-as-you-go with usage-based billing and volume discounts available, so you only pay for what you use.

We provide tools and expertise to navigate global regulations, including local number types, consent management, and GDPR-aligned data handling.

Real-time Delivery Reports through webhooks keep you in the loop on every message, giving you complete visibility and control.

The Sinch Super Network offers 600+ direct carrier connections and a single API to reach 190+ countries, making global expansion easy.

You need an application that can integrate with the Sinch SMS REST API and development resources to implement callbacks.

Sign up, create a project, and get credentials. Send messages with a short-lived token, then receive inbound messages and DLRs through one unified webhook:

1. Create your project in the Sinch dashboard.
2. Send messages using your credentials and access token.
3. Receive inbound messages and delivery reports via a unified webhook.