MISSION-CRITICAL MESSAGING

Get reliable delivery with our transactional SMS service

Speed and deliverability are critical for messages like OTPs, alerts, and updates. With Sinch’s transactional SMS service, you get low-latency delivery, high reliability, direct-to-carrier routing, and a 99.95% uptime SMS API—helping you reach users in 190+ countries with confidence.

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

WHY IT MATTERS

Reliable, low-latency SMS built for high-stakes moments

When messages protect revenue and security, every second counts. Our transactional SMS service pairs direct routes, real-time reporting, and built-in security so your team can deliver confidently at scale.

Build reliable delivery

Direct-to-carrier routing and a 99.95% SMS API uptime commitment keep critical notifications flowing.

Deliver instantly

Get OTPs and alerts to users in seconds, not minutes, thanks to our global low-latency network with 600+ carrier connections.

Protect data privacy

Automatic redaction removes OTP codes and phone numbers from logs, supporting GDPR and enterprise security goals.

BUILD RELIABLE DELIVERY

Send mission-critical messages that get through every time

With 600+ direct carrier connections and a 99.95% uptime commitment, your OTPs and alerts skip delays and reach people right when they need them. This transactional SMS service is built to keep delivery rates high.

  • Direct-to-carrier delivery, no middlemen

  • 99.95% SMS API uptime commitment

  • Proven reliability at massive scale

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LIGHTNING-FAST DELIVERY

Send time-sensitive alerts in seconds, not minutes

Your transactional SMS service should never slow you down. Our low-latency routing is made for real-time needs, so users get fraud warnings, system updates, and confirmations the moment they happen.

  • Global network tuned for speed

  • High-priority queues for urgent traffic

  • Real-time delivery receipts via webhooks

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ENTERPRISE-GRADE SECURITY

Keep sensitive customer data safe from end to end

Messages travel the Sinch Super Network, and you can opt for redaction that strips sensitive fields from logs to help you meet GDPR and ISO 27001 requirements—safeguarding user data by design.

  • Automatic message and number redaction

  • ISO 27001 certified infrastructure

  • Compliance-ready by design for regulations like GDPR

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HELPFUL FEATURES

Everything you need for dependable SMS at scale

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

Real-time delivery reports

Webhooks push status updates to your app so you always know when a message lands.

Automatic message redaction

Configure automatic redaction of OTP codes and phone numbers from logs after a set time to protect sensitive data.

High-priority routing queues

Move urgent traffic to the front of the line for the fastest possible delivery.

Global low-latency network

600+ direct carrier links across 190+ countries to minimize hops and delays.

Dynamic number routing

Select the best sender ID automatically for each destination.

Full Unicode & emoji support

Communicate clearly in any language, complete with emojis.

ISO 27001 certified

Our infrastructure and processes are audited to rigorous international security standards.

GDPR compliant

Built-in features help you meet strict data privacy requirements.

POPULAR USE CASES

Built for the notifications users count on

Two-Factor Authentication (2FA) & OTPs

Securely deliver login verification codes so users can access their accounts quickly.

Real-time alerts

Send instant fraud warnings, security alerts, and system status notifications that need immediate action.

Order & delivery confirmations

Confirm purchases right after they’re made and send shipping updates to keep customers informed every step of the way.

Appointment & payment reminders

Reduce no-shows and late payments by nudging customers before important deadlines.

Frequently asked questions about transactional SMS service

Our direct-to-carrier network is optimized for low latency, so messages are typically delivered in seconds.

Messages go through the Sinch Super Network, and our configurable redaction feature can strip OTP codes and phone numbers from logs after delivery.

Real-time delivery reports through webhooks let your system track every message’s status from sent to received.

We set ourselves apart with a 600+ direct carrier network and 99.95% uptime commitment to provide higher deliverability and lower latency than aggregator-based alternatives.

Simply integrate the API, trigger events from your app (e.g., login, order update), and real-time receipts once messages are delivered over our low-latency network.

To get started, you’ll need an application or system to integrate with the Sinch SMS API and developer credentials from the Sinch dashboard. Once you have those, you can start configuring your environment to handle incoming and outgoing messages. This helps make sure you have the proper setup in place before sending your first SMS.

Yes. We cover 190+ countries and territories through direct connections, so you get reliable delivery wherever your users are.