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Build Apps that communicate with everyone in the world

Simple SMS API by developer for developer
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No contracts. Pay for what you use. Scale up on demand.


Reach any phone, anywhere, with the speed and power of our APIs and carrier network.


Local carrier connectivity around the world that scales up or down with your usages.

Long Messages

Avoid the 160-char maximum and deliver up to 9 multi-part messages as one SMS.

Trusted by companies like ...

Not just another Messaging API. A powerful software platform to simplify your development and deliver solutions.

Use cases

Marketing Campaigns

Targeted, localized campaigns and promotions.


Urgent message delivery. A high performance, reliable SMS platform.


Two-factor authentication (2FA) and One-time password (OTP) solutions to safeguard key transactions.


Share delivery updates, appointment reminders, transaction confirmations and more.


2,000 sms
฿0.50 / sms
10,000 sms
฿0.50 / sms
22,222 sms
฿0.45 / sms
50,000 sms
฿0.40 / sms
142,857 sms
฿0.35 / sms
* Prices do not include 7% VAT


curl -X POST \ --data-urlencode "to=+661234567890" \ -d "from=ATSMS" \ -d "text=A text message" \ -d "apiKey=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" \ -d "apiSecret=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"