> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zeplo.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Zeplo is the WhatsApp Business API platform for marketing, customer support, and automation at scale.

# What is Zeplo?

Zeplo is a multi-tenant SaaS platform for WhatsApp Business marketing, customer support, and automation. Send messages, manage conversations, run campaigns, build visual automation flows, and scale your WhatsApp operations with a powerful REST API and real-time WebSocket events.

Whether you're building a CRM integration, a customer support tool, or a marketing automation platform, Zeplo provides the APIs and SDKs you need to get started in minutes.

## Key Features

> **[Messaging](https://docs.zeplo.ai/docs/features/messaging.md)**
>
> Send text, images, documents, templates, and interactive messages via WhatsApp with delivery tracking.

> **[Contact Management](https://docs.zeplo.ai/docs/features/contacts.md)**
>
> Full CRM with contact creation, groups, tags, metadata, and bulk import capabilities.

> **[Campaigns](https://docs.zeplo.ai/docs/features/campaigns.md)**
>
> Create and execute bulk messaging campaigns with scheduling, targeting, and real-time analytics.

> **[Automations](https://docs.zeplo.ai/docs/features/automations.md)**
>
> Visual drag-and-drop flow builder with triggers, conditions, delays, and action nodes.

> **[Templates](https://docs.zeplo.ai/docs/features/templates.md)**
>
> Create, submit, and track WhatsApp message template approvals across multiple languages.

> **[Webhooks](https://docs.zeplo.ai/docs/features/webhooks.md)**
>
> Real-time event notifications for message delivery, conversation updates, and contact changes.

## Why Choose Zeplo?

> **Multi-Channel Management**
>
> Connect and manage multiple WhatsApp Business Accounts from a single dashboard. Each channel operates independently with its own contacts, templates, and campaigns while sharing a unified API.

> **Real-Time Communication**
>
> Built on Socket.IO with Redis adapter support for real-time messaging, typing indicators, agent assignment, and message status updates across all connected clients.

> **AI-Powered Auto-Reply**
>
> Train a custom AI assistant on your knowledge base (PDFs, documents, URLs) with OpenAI integration. Automatically respond to customer inquiries with context-aware replies.

> **Enterprise Security**
>
> Role-based access control with four permission tiers, API key management with rate limiting, session-based authentication, and encrypted data storage.

> **Scalable Architecture**
>
> Built on PostgreSQL with Drizzle ORM, BullMQ job queues, and Redis caching. Supports multi-instance deployment with PM2 for high availability.

> **Payment Integration**
>
> Accept payments via Stripe, Razorpay, PayPal, Paystack, and Mercado Pago with subscription management and billing analytics built in.

## Use Cases

* **Marketing Campaigns** — Send bulk promotional messages with template-based campaigns
* **Customer Support** — Unified inbox with real-time chat, agent assignment, and AI auto-reply
* **Notification Systems** — Transactional alerts via WhatsApp templates
* **CRM Integration** — Sync contacts, track conversations, and automate follow-ups
* **Lead Generation** — Website chat widget with automatic WhatsApp follow-up
* **E-commerce** — Order confirmations, shipping updates, and payment collection

## Getting Started

> **[Quickstart Guide](https://docs.zeplo.ai/docs/quickstart.md)**
>
> Send your first WhatsApp message in under 5 minutes.

> **[API Reference](https://docs.zeplo.ai/docs/api-reference/overview.md)**
>
> Explore all REST API endpoints with interactive playgrounds.


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