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One API for WhatsApp, RCS, SMS and email

Send OTPs, order alerts and campaigns on every channel with one auth key, one request shape and one webhook stream. If a channel is down, the message falls back to the next one.

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Global latency< 38ms
Fallback SLA100%at P99
Direct carriers84

        
200 OK31 ms

      

      
    

  











  

    

      
Unified channel dispatch

      
One request in, four networks out

      
Every message goes through the same ingress, the same checks and the same webhooks, whichever channel it ends up on.

      
    
        
  1. 1
    ValidateDestination schema checked on arrival
    2. 
        
  2. 2
    StandardizeTemplates for every channel in one shape
    3. 
        
  3. 3
    DispatchSent down the carrier pipeline for that channel
    4. 
        
  4. 4
    ConsolidateLogs and delivery webhooks back in one stream
    5. 
      

    

    
  







  

    

      
Channels
Every major messaging channel on one endpoint

      
Same auth, same request shape and same webhooks for WhatsApp, RCS, SMS and email.

    

    

      

        

          
01

          
WhatsApp Business API

          
Templates, media, quick replies and call-to-action buttons, with sent, delivered and read webhooks for every message.

          
Network
Meta Cloud API
Format
Meta-compatible requests

          WhatsApp API 
        

        
AYour Brand

          
Hi Priya, your order #4821 is out for delivery and will arrive today between 2 and 4 PM.
10:24 ✓✓

          
Track order
Reschedule

          
Thanks, see you then

        

      

      

        

          
02

          
RCS Business Messaging

          
Rich cards, carousels and suggested replies inside the phone’s own messaging app, branded and verified.

          
Network
Google Jibe
Format
Rich cards and suggestions

          RCS API 
        

        
AYour Brand

          
Festive collection40% off
New arrivalsDelivered in 48 hours.

          
Shop nowView offersTalk to us

        

      

      

        

          
03

          
Bulk SMS

          
OTPs, alerts and campaigns to thousands of phones in seconds over direct operator routes, with delivery reports.

          
Network
Tier-1 telco SMPP
Reports
Delivery receipts per message

          SMS API 
        

        
AXAX-BRANDS

          
Today 9:41 AM

          
482913 is your verification code. It expires in 10 minutes. Do not share it.

          
Today 9:42 AM

          
Your payment of Rs 2,500 was successful. Ref: TXN88412.

        

      

      

        

          
04

          
Transactional email

          
Transactional and marketing email at volume from dedicated IPs, with delivered, opened and bounced events.

          
Network
Dedicated IP relay
Events
Delivered · opened · bounced

          Email API 
        

        
A
Your receipt from Your Brandreceipts@yourbrand.com
delivered

          
Hi Arjun, thanks for your purchase. Your receipt for order #4821 is below.
View receipt

      

    

  







  

    

      
Vendor consolidation

      
One integration, one dashboard, one contract

      
Instead of four vendor relationships, four sets of API docs, four billing cycles and four support contacts, you get every channel through one integration.

      

        
One contract, one invoiceOne procurement process and one bill to reconcile instead of four.

        
Analytics for every channelThroughput, delivery confirmations and costs across all channels in one console.

        
One developer APIOne schema and one authentication key for WhatsApp, RCS, SMS and email.

      

    

    
  







  

    
Reliability

    
99.999%

    
Platform uptime, backed by a financial SLA

    
Know what’s running before your customers do. Every component is tracked on a live page you can check yourself.

    

      
Checking statusFull status page 

      
Loading components

      
Today

    

  







  

    

      
Developer experience

      
Why developers choose Accelbiz

      
One API across WhatsApp, RCS, SMS and email, with documentation written for how you actually build.

      

        
01
One API shapeSame authentication, request format and webhook structure across all four channels.

        
02
Real documentationClear request and response examples, not auto-generated reference dumps.

        
03
Direct supportReach a real integration engineer, not a ticket queue.

      

      

        Read the docs 
        WhatsApp reference
        RCS reference
      

    

    

      

        

        

      

    

  







  

    
Use cases

    
Built for messages that can’t be dropped

    
When a dropped message means a failed login or a lost order, channel fallback keeps delivery inside the latency you agreed to.

    

      
01
OTP and two-factor authentication
Channel fallback delivers codes in under 3 seconds, even during carrier outages.
SLA < 3.0 sP99 deliverability 99.98%

      
02
Order and delivery alerts
WhatsApp and RCS rich cards with live tracking links and reschedule buttons.
Native rich cardsRead receipts

      
03
High-volume marketing broadcasts
Segmented campaigns across channels, with opt-out handling and template approval queues built in.
Throughput 10,000 msg/sOpt-out automation

      
04
Two-way customer support
Bidirectional webhooks send customer replies straight into Zendesk, Freshdesk or your own tools.
Session sync 24 hFull threading

    

  







  

    

      
Data governance

      
Encrypted, kept in India, redacted after delivery

      
Message data is protected from the moment it reaches the API and kept only as long as delivery needs it.

    

    

      
Encryption
In transit and at rest, with customer-managed keys

      
Data residency
Stored in India

      
PII redaction
Automatic, once delivery is confirmed

      
Consent
Opt-in verification logged for every recipient

    

  







  

    

      

        
Not looking to build?

        
Prefer a ready-made platform to an API?

        
The Accelbiz Communications Platform runs WhatsApp, email, SMS and RCS campaigns from one dashboard, with no code. Upload a spreadsheet, build templates, launch a campaign and track delivery and reads for every recipient.

        
  • Campaign builder
  • Template studio
  • Delivery and read tracking
  • Multi-tenant
  • Reports and sharing

        Explore the platform 
      

      
    

  







  

    

      
Contact

      
Talk to a real person, not a ticket queue

      
Whether you’re evaluating the API, need help with an integration or have an account question, write to us and we’ll route it to the right person.

      

        sales@accelbiz.in
        An integration engineer replies, not a bot
      

    

    

      
Send us a message

      
We reply from sales@accelbiz.in

      

      
      

        

        

      

      

      

      
    

  







  

    
Every channel your customers use, behind one API

    
Sign in to start sending on WhatsApp, RCS, SMS and email

    
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