Relay

Three channels. One relay.

Send WhatsApp messages, transactional email, and SMS from one API key. Connect your number, get a key, and start sending in minutes.

Get your API key
POST /api/send.php
{
  "channel": ,
  "to": ,
  "message":
}
POST /api/send.php
{
  "channel": "email",
  "to": "customer@example.com",
  "subject": "Receipt"
}
→ 200 delivered
POST /api/send.php
{
  "channel": "sms",
  "to": "9188…",
  "message": "Your OTP is 4821"
}
→ 200 delivered
1

Create an account

Sign up and verify your email to activate sending.

2

Connect your channels

Scan a QR code to link WhatsApp. Email and SMS sending work right away.

3

Send from your code

Call one endpoint with your API key for any channel.

Plans

Every plan includes WhatsApp, email, and SMS sending.

Starter

₹500
  • 2,000 WhatsApp/email messages included
  • 0 SMS included
  • Up to 1 connected device
  • 15 msgs/min rate limit
Choose Starter

Agency

₹5,000
  • 100,000 WhatsApp/email messages included
  • 0 SMS included
  • Up to 10 connected devices
  • 100 msgs/min rate limit
Choose Agency
© 2026 Relay. All rights reserved. Terms · Privacy · Refunds