The channel your customers already have open.
WhatsApp has the highest open rates of any messaging channel, and over two billion people already use it daily. Reach customers where the conversation is already happening — marketing, commerce, support, and account security, from one number.
Message templates are reviewed by Meta before they can be sent.
Weekend Flash Sale — 20% off, today only.
Sending my code now, thanks!
Send your first WhatsApp message
curl -X POST "https://api.accelbiz.in/v23.0/whatsapp/messages" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{ ... }'Full request and response reference is available once you're signed in.
Four ways to run a conversation on WhatsApp
Conversational Marketing
Rich promotional templates — carousels, limited-time offers, coupon codes — paired with quick-reply buttons that turn a broadcast into an action. Every send drives toward a click, a code, or a reply, not just an open.
Festive Carousel — 3 bundles, one tap to view.
Utility
Transactional templates with dynamic variables — order confirmations, delivery updates, and account alerts, filled in per recipient and sent the moment the triggering event happens.
A separate template category from Marketing, with its own approval path and messaging limits.
Hi Raksha, your order #48213 has shipped and will arrive by Thu, 25 Sep.
Your account statement for August is ready to view.
Conversational Support
Automate answers to common questions and triage requests before they reach a human. When a conversation needs a person, it escalates to an agent with full context — cutting ticket volume without cutting satisfaction.
Hi! How can we help today?
Connecting you to an agent…
Secure Authentication
One-time passcodes and verification templates, delivered through a channel customers already trust and check first. A separate template category from marketing, with its own approval path.
Your verification code is 482 913
Do not share this code with anyone.
Autofill from WhatsApp: 482913
A template library that keeps you compliant
Every message you send through WhatsApp starts as a template — reviewed and categorized before it reaches a single customer. The library is where marketing, utility, and authentication templates live, get versioned, and move through approval.
Each template's quality signal is tracked independently, so one rejected or fatigued template doesn't put your whole number at risk.
Quality + Tier Guardrails
Sending too much, too fast, is the fastest way to damage a WhatsApp number's standing. Throttling rules slow sends when negative feedback spikes, and segment and frequency controls keep messaging relevant enough that customers don't block or report it.
This is the same discipline that keeps your quality rating and messaging tier intact as you scale.
Where conversations start
Automated flows can hand off to a human agent at any point — every automation stays inside Meta's messaging policies.
See what's working, in one view
App-like experiences, without leaving the chat
Multi-step forms, radio choices, dropdowns — Flows turn a template or an in-session message into a guided experience, from lead capture to appointment booking, without sending anyone to a browser.
Product messages and catalogs
Send a single product or a curated multi-product message straight from your catalog, so browsing and buying happen inside the same conversation.
Requires a Meta catalog connected to your WhatsApp Business account.
Built around Meta's rules, not around them
Every business-initiated conversation outside the 24-hour customer service window requires an approved template and prior opt-in — no exceptions. Templates are reviewed against Meta's policies before they go live. This is the same discipline that protects your quality rating and messaging tier in the guardrails above.
The channel your customers already have open.
Get WhatsApp API access and start sending marketing, commerce, support, and authentication messages from one number.