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WhatsApp Auto-Reply Bot SaaS

Automated WhatsApp responses for businesses — set up in minutes

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Project Overview

A SaaS platform that enables businesses to set up automated WhatsApp responses without any technical knowledge. Business owners define reply rules, create message templates, and manage multiple WhatsApp numbers from a single, intuitive dashboard. The system handles incoming messages, routes them by keyword, respects business hours, and escalates to human agents when needed — all configured without writing a single line of code.

The Problem

Manual WhatsApp Customer Support

Small businesses needed to respond to hundreds of daily WhatsApp messages but lacked the technical knowledge to implement bot solutions. Hiring developers was costly, and existing tools required complex setup that overwhelmed non-technical owners, leaving customer messages unanswered for hours.

The Solution

No-Code Auto-Reply SaaS Platform

Built a user-friendly SaaS where business owners can configure automated WhatsApp replies in minutes using a visual rule builder — no coding required. The platform handles message queuing, keyword routing, template responses, and analytics from a single dashboard accessible on any device.

Key Features

01
No-Code Rule Builder
Visual interface to define trigger keywords and corresponding auto-replies. Works like a flowchart — no programming required.
02
Template Responses
Pre-built message templates with dynamic variables like customer name, order number, or product details for personalised auto-replies.
03
Multi-Number Management
Connect and manage multiple WhatsApp Business numbers under one account with separate rule sets per number.
04
Keyword Routing
Intelligently route conversations to different reply flows based on keywords, message intent, or sender history.
05
Business Hours Configuration
Set active reply hours per number. Outside hours, customers receive a configurable away message and are queued for follow-up.
06
Conversation Analytics
Dashboard showing message volume, response rates, popular keywords, and peak conversation times across all numbers.
07
Human Agent Escalation
When a conversation exceeds the bot's scope, it is flagged and handed off to a live agent with full conversation context.
08
API for Integrations
REST API endpoints allow external systems like CRMs, e-commerce platforms, and ERP tools to trigger messages or pull analytics.

Tech Stack

Node.js + TypeScript
Backend Runtime
High-throughput message processing with type-safe business logic. Event-driven architecture matches WhatsApp's webhook model perfectly.
Next.js
Frontend Dashboard
Responsive SaaS dashboard with real-time updates, rule builder interface, and analytics visualisation built with React components.
WhatsApp Business API
Messaging Layer
Official Meta API for reliable message sending and receiving at scale, with webhook delivery for real-time event processing.
MongoDB
Database
Flexible document model for storing dynamic rule sets, message templates, and conversation logs without rigid schema constraints.
Bull Queue
Message Queue
Redis-backed job queue ensures reliable, ordered message processing with retry logic and rate limiting to comply with WhatsApp policies.

Architecture

Incoming WhatsApp webhooks hit the Node.js backend, which validates and immediately enqueues the message payload via Bull Queue. Worker processes dequeue messages, match them against the tenant's rule set stored in MongoDB, and dispatch the appropriate template response through the WhatsApp Business API.

The Next.js dashboard communicates with the backend over a REST API to manage rules, templates, and numbers. Real-time conversation updates are pushed to the dashboard via server-sent events. MongoDB stores all tenant data, rule configurations, and message history. Redis backs the Bull Queue and also caches frequently accessed rule sets to minimise database reads under high load.

[WhatsApp User] | webhook [Node.js API Backend] | [Bull Queue (Redis)] | [Worker Processes] | | [MongoDB Rules] [WhatsApp Business API] | [Next.js SaaS Dashboard] ← REST API

Need a WhatsApp Bot or SaaS Platform?

I build scalable SaaS products and messaging automation systems for businesses across various industries. Let's discuss your use case.

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