Send automated SMS notifications to your WHMCS clients and admins through kwtSMS. Free and open source.

kwtSMS is a Kuwait-based SMS gateway that delivers messages to 200+ countries. It supports dedicated sender IDs, Arabic messages, balance tracking, and a REST API built for developers.

Sign up for a kwtSMS account to get started.

• Automated SMS to clients on invoice paid and new registration
• Admin SMS alerts on new orders
• Gateway management: login, balance, sender ID selection, coverage sync
• Test SMS with full pipeline and inline feedback
• Full send logs, attempt logs (security events), debug logs
• English and Arabic message templates with placeholder substitution
• Kuwait market focused — Arabic critical, 70 chars/page

• WHMCS 8.12.x, 8.13.x, or 9.0.x
• PHP 8.2 or 8.3
• allow_url_fopen enabled in PHP
• kwtSMS account at kwtsms.com
• International phone number input enabled in WHMCS Settings

1. Upload modules/addons/kwtsms/ to your WHMCS modules/addons/ directory
2. In WHMCS Admin: Setup > Addon Modules > kwtSMS > Activate
3. Click Configure, grant full admin permissions
4. Open the kwtSMS addon, go to Settings tab
5. Enter your kwtSMS API username and password, click Login
6. Select your Sender ID from the dropdown
7. Set Default Country Code (e.g. 965 for Kuwait)
8. Toggle Gateway to On

www.kwtsms.com/support