LongSend - WhatsApp Gateway

LongSend is a full-featured WhatsApp gateway platform that empowers businesses and organizations to manage large-scale messaging operations from a single, intuitive command center. Built with Golang on the backend for high-throughput message processing and React with TypeScript on the frontend for a responsive dashboard experience, the system uses SQLite as its lightweight yet reliable data store.

At its core, LongSend connects to the WhatsApp API to send and receive messages programmatically. Businesses can compose individual messages or broadcast to thousands of contacts simultaneously, with built-in rate limiting and queue management to comply with platform policies and avoid account restrictions.

The scheduling engine allows users to prepare campaigns in advance and have them dispatched at optimal times, while the contact and group management module provides tagging, segmentation, and import/export functionality so teams can maintain organized recipient lists. The analytics dashboard tracks delivery rates, read receipts, and response metrics, giving marketers actionable insights into campaign performance.

Webhook integration is a standout feature: external systems can trigger messages or receive real-time delivery events via configurable HTTP callbacks, making LongSend an ideal middleware layer between CRM platforms, e-commerce stores, and customer support tools. The Golang backend ensures that even under heavy load the gateway processes thousands of messages per minute with minimal latency, while the React frontend provides a fast, accessible interface for non-technical operators to manage day-to-day messaging tasks.