🚀 Overview

Purpose: Streamline client communication in WHMCS using SMS and WhatsApp messaging integrated directly into your billing and support workflows.

Real-world use: Hosting companies, SaaS providers, and businesses using WHMCS can automate invoice notifications, support updates, and marketing messages.

Target users: WHMCS administrators, customer support teams, marketing managers, and developers seeking GPL-compliant messaging integrations.

✨ Key Features

• SMS Messaging: Send transactional and marketing SMS to clients from WHMCS.
• WhatsApp Integration: Deliver WhatsApp notifications, reminders, and promotional messages.
• Template Management: Create customizable templates for invoices, tickets, and marketing campaigns.
• Automated Notifications: Trigger messages for invoices, service activations, ticket responses, and domain expirations.
• Multi-Gateway Support: Compatible with popular SMS and WhatsApp gateway providers.
• Admin Dashboard: Monitor sent messages, logs, and delivery status.
• Scheduling: Schedule messages for future delivery and campaigns.
• Multi-Language Support: Send notifications in multiple languages based on client preferences.
• GPL License: Fully open-source, customizable, and redistributable under GPL terms.

⚙️ Technical Stack

• Platform: WHMCS 8.x+
• Backend: PHP 7.x / 8.x (WHMCS Module Structure)
• Database: MySQL / MariaDB via WHMCS
• APIs: SMS Gateway APIs, WhatsApp Business API
• Server: Apache / Nginx with PHP-FPM; SSL required for WhatsApp API

Server Requirements: PHP extensions: curl, json, mbstring, openssl; SSL enabled; WHMCS license required.

🧩 Installation Guide

1. Upload the Zender module folder to /modules/addons/ in your WHMCS installation.
2. Activate the module from the WHMCS admin panel.
3. Configure SMS and WhatsApp gateway credentials in the module settings.
4. Create message templates and assign triggers for invoices, tickets, and other events.
5. Test sending messages to ensure proper delivery and logging.

📦 Deliverables

• Complete WHMCS module source code (GPL licensed)
• Installation and configuration instructions
• Sample SMS and WhatsApp templates
• Documentation for gateway integration and triggers

📱 Supported Platforms

WHMCS: 8.x and above

Server OS: Linux, macOS, Windows (PHP + MySQL hosting)

Messaging Platforms: SMS Gateways, WhatsApp Business API

🧠 Notes

License: GPL – Free to modify and redistribute under license terms with proper credit.

• Ideal for automated client communication and marketing campaigns in WHMCS.
• Ensure gateways are properly configured and SSL is enabled for secure messaging.
• Maintain author credits when redistributing.

Customization Tips:

• Add support for multiple languages or regional messaging standards.
• Create advanced automation triggers based on client behavior or invoices.
• Integrate analytics to track delivery and engagement metrics.

👨‍💻 Original Developer Credit

This GPL release is based on the original Zender – WHMCS Plugin for SMS and WhatsApp developed by its author(s) on CodeCanyon.
Proper attribution ensures transparency and respect for the original work.

View Zender on CodeCanyon

🔒 Disclaimer

GPL Redistribution Notice: Distributed under GNU GPL for development, educational, and open-source purposes. Not affiliated with or endorsed by the original developer. Users are responsible for secure deployment, data handling, and gateway compliance.

✅ E-E-A-T Compliance (Experience • Expertise • Authoritativeness • Trustworthiness)

Experience: Designed for real-world automated messaging and client communication workflows in WHMCS.

Expertise: Developed using WHMCS module architecture with integration for SMS and WhatsApp APIs.

Authoritativeness: Original developer credited to ensure authenticity and transparency.

Trustworthiness: GPL licensing ensures legal redistribution; installation guidance emphasizes secure deployment, compliance, and best practices.