One dashboard for WhatsApp campaigns, live chat, automation, and voice
Connect multiple WhatsApp numbers, send bulk campaigns without getting blocked, reply to customers in real time, automate the repetitive conversations, and add SMS or Voice Call gateways — from a single, self-hosted-friendly panel.
Multi-device • Live chat inbox • Automation • SMS/Voice gateways • Installable PWA
A WhatsApp business gateway built for teams that outgrew a single phone
Most businesses start their WhatsApp presence on a single phone, which works fine until the number of conversations, campaigns, and support tickets grows past what one device — or one person — can handle. 4SD was built for exactly that turning point: it connects to WhatsApp the same way your phone does, but gives you a real dashboard on top, so several team members, several numbers, and several automated workflows can all run at once without stepping on each other.
Instead of asking you to migrate to a closed, expensive "Business API" contract before you've even validated the need, the platform works with the WhatsApp numbers you already have. You scan a QR code once per device to connect it, and from that point the dashboard handles campaign sending, an inbox for two-way conversations, automation rules, delivery tracking, and — if you want to go beyond WhatsApp — SMS and voice calling through the same panel.
It's the same underlying idea as WhatsApp Web — a real WhatsApp session, mirrored into a browser tab — extended into something a team can actually run a business on: multiple sessions active at once, a queue that survives a restart, and a permission system so a support agent can see the live chat inbox without also getting access to billing or campaign settings.
Built for the teams that live inside WhatsApp all day
If your business already gets orders, questions, and support requests over WhatsApp, this is the layer that turns that into a manageable channel instead of a constantly-buzzing phone.
E-commerce & D2C brands
Send order confirmations, shipping updates, cart-recovery nudges, and festival promotions in bulk, then handle the replies — "where's my order?", size questions, return requests — in one shared inbox instead of scattered across personal phones.
Marketing & growth agencies
Run WhatsApp campaigns for multiple clients from one panel, keep each client's numbers, templates, and reports separate, and bill your own clients on top of a single subscription instead of juggling several tools.
Customer support teams
Route incoming chats to the right agent, keep full conversation history for every customer, and let keyword automation handle the FAQs so your team's time goes to the conversations that actually need a human.
Local businesses & service providers
Clinics, coaching institutes, real estate agents, and local shops use event reminders and scheduled messages to handle appointment confirmations, fee reminders, and seasonal offers automatically, without hiring someone just to send messages.
Bulk voice & SMS senders
Political, civic, and large-scale notification campaigns that need to reach numbers WhatsApp itself can't (or shouldn't) reach use the Bulk Voice Call and SMS/Voice Gateway tools side by side with WhatsApp, from the same wallet and the same dashboard.
Developers & resellers
A documented REST API, webhook support, and an optional self-hosted server mode mean the platform can sit underneath your own product or client deployments instead of being the only thing your customers ever see.
Everything you need to run WhatsApp like a real channel, not a side chat
Every feature below ships in the same dashboard — no separate add-on to buy, no second login.
Bulk WhatsApp Campaigns
Upload a contact list, write your message once, and let the sending engine spread the campaign across your connected numbers with human-like delays, spintax variation, and per-country or per-number rules — the combination that keeps a real campaign from looking like spam to WhatsApp's own systems. Track sent, delivered, read, and failed counts per campaign, and export the results.
Live Chat Inbox
Every reply lands in a real-time, multi-agent inbox — not just your phone's notification tray. Assign conversations to specific team members, see delivered/read receipts, search chat history, and reply from any connected number, so customer support doesn't depend on one person's handset being nearby.
Keyword & Chat Automation
Set up keyword-triggered auto-replies, welcome messages, and rule-based flows that respond the moment a customer sends a message — including plugging in ChatGPT, Gemini, or Claude for AI-generated replies when a scripted response isn't enough.
Scheduled Messages & Smart Event Reminders
Schedule a campaign for later, or go further with the built-in festival/event calendar and rule engine that automatically reaches out on birthdays, anniversaries, or any date you define — across WhatsApp, SMS, and voice — without anyone manually building the same reminder every year.
Custom SMS & Voice Call Gateways
Register your own SMS or Voice Call gateway — including real GSM/SIM hardware gateways — inside the same dashboard your WhatsApp campaigns run from. Admin-configurable daily send limits keep a single high-volume sender from overloading your hardware, while everyone else keeps sending normally.
Bulk Voice Call Broadcasting
Need to reach thousands of numbers with a recorded voice announcement instead of a text message? Bulk Voice Call handles large voice broadcasts on its own calling-window schedule, with per-call outcome tracking (answered, busy, no answer, congestion) and configurable billing per second or per submission.
Sender Warmup Pool
A freshly connected WhatsApp number that jumps straight into heavy campaign sending is the fastest way to get it banned. The Sender Warmup Pool has your own devices chat with each other automatically — multi-turn, human-like conversations — so a number builds a healthy sending history before you rely on it.
Bring Your Own Server
Prefer to run the sending engine on your own PC, VPS, or even a spare Android phone instead of shared infrastructure? Self-hosted server support lets a device connect through your own tunnel, keeping that traffic entirely on hardware you control.
Spintax Message Library
Reusable {like|such as|for example} spin-syntax snippets, shared across your team or kept personal, so every message in a campaign reads a little differently — better for deliverability and far less repetitive for the people receiving it.
Wallet, Packs, Vouchers & Coupons
One wallet balance funds every channel — WhatsApp, SMS, voice, and Bulk Voice Call. Subscribe to a Pack for recurring limits and features, redeem a Voucher for an instant top-up or feature unlock, and let balance-triggered Coupons reward customers who keep topping up.
Built-in File Manager
A shared media library for images, audio, and documents used across campaigns, templates, and forms — upload once, reuse everywhere, instead of re-uploading the same image into five different composer screens.
Installable App (PWA)
Install the dashboard as an app on desktop or mobile straight from the browser — complete with an offline page, push notifications, and an admin-configurable bottom navigation bar for the features your team uses most.
Up and running in four steps
Create your account
Sign up free — no card required — and land straight on your dashboard.
Scan to connect WhatsApp
Scan a QR code with the WhatsApp number(s) you already use, exactly like linking WhatsApp Web.
Import contacts & build your message
Upload a contact list, write your campaign with spintax variation, and pick a schedule.
Send, reply, and automate
Watch delivery in real time, reply from the live chat inbox, and turn on automation for the rest.
Bulk WhatsApp sending, without treating your number as disposable
The single biggest reason WhatsApp numbers get banned isn't "bulk sending" itself — it's bulk sending that looks nothing like how a real person uses WhatsApp: identical messages, unnatural speed, and a brand-new number going straight from zero to thousands of chats. The platform is built around avoiding exactly that pattern, not around promising to "bypass" WhatsApp's own detection.
Spintax variation means no two recipients see byte-identical text. Configurable sending delays and per-gateway daily limits keep volume looking human rather than scripted. And the Sender Warmup Pool lets a new number spend its first days having real back-and-forth conversations with your other devices before it ever touches a campaign — the same "build a history first" principle experienced WhatsApp marketers already follow, just automated.
Spintax on every send
Every campaign can vary its wording per recipient automatically.
Human-paced delivery
Configurable gaps between sends instead of an instant blast.
Warmup before scale
New numbers earn a real chat history before heavy use.
Multi-number redundancy
Spread volume across several connected devices, not one.
From the blog
Self-Hosted WhatsApp Gateway: Running Your Own Sending Engine
Why some teams choose to run the sending engine on their own hardware instead of shared infrastructure — and h...
Smart Event Reminders: Automating Birthday, Festival, and Custom-Date Outreach
Stop manually rebuilding the same birthday and festival campaign every year — set the rule once and let it run...
Bulk Voice Call Broadcasting: When Voice Beats a Text Message
Text isn't always the right channel. Here's when a recorded voice broadcast reaches people that WhatsApp and S...
Frequently asked questions
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