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For the very best in SMS messaging visit CLX Communications, Sinch’s parent company! With a full range of easy to integrate SMS APIs and SDKs, you’ll be set up in a matter of minutes. Find out more today and sign up for a free test account! No additional monthly fees. No commitments.


Account Verification

Send codes via SMS to verify phone numbers

User Notifications

Send important alerts, reminders, confirm orders, and more, all via SMS

Engage Customers

Share product updates, enhanced features, and drive downloads with SMS


It's this easy

rest Created with Sketch. Curl

rest Created with Sketch. Node JS

rest Created with Sketch. C Sharp

curl --user "application\your_app_key:your_app_secret" --data '{"message":"your_message"}' -H 'Content-Type: application/json'

sinchMessaging.sendMessage = function (phoneNumber, message) {
var auth = sinchAuth();
var options = {
method: 'POST',
url : "" + phoneNumber,
headers : {
"Content-Type" : "application/json",
"Authorization" : auth
body: "{"Message":"" + message + ""}"

var client = new Sinch.SMS.Client("yourkey", "yoursecret");
var messageid = await client.SendSMS("+46722223355", "hello from sinch");


Enjoy easy integration with our thorough SMS documentation for each platform. A variety of tutorials and sample applications also available:


Two way SMS

Sinch supports the provisioning of SMS-enabled numbers that can be used for two way SMS. Using these numbers, a partner can send SMS to users and receive SMS when a user replies.

Mobile Originated SMS

Sinch enables your users to use your app to send SMS from their mobile phones. Mobile Originated (MO) SMS can be easily configured in any iOS and Android app using the Sinch SMS API.

Analytics Dashboard

Understand how SMS is being used in your app with our Analytics Dashboard. Review reporting and billing details and track your SMS performance.

CUSTOMER USE CASES Discover More Customer Use cases >

Using the Sinch SMS API, Swedbank sends fleet management notifications to the 15,000 drivers of its company cars.

"The Sinch SMS API makes our fleet more efficient, saving us time and money."

Robert Bergman
Head of Fleet Management, Swedbank

At Crossroads, customers sell their in-style, on-trend clothing and accessories for cash or trade credit on the spot. The retailer uses Sinch SMS to manage in-store waitlists.

"We created an iPad app to replace our paper waitlist for our sellers. With Sinch, the waitlist process is smoother and more reliable with better SMS deliverability."

Gabriel Block
CEO and President