Send4Sale — SMS · WhatsApp · Webhooks

SMS and WhatsApp automation gateway for small businesses, developers and AI workflows

Connect your business systems to SMS, WhatsApp, webhooks, alerts and AI workflows — without expensive enterprise platforms.

All systems operational Plays nicely with
Odoo Shopify HubSpot OpenAI Zapier
curl · send-sms.sh
# Send an SMS through one of your Android devices
curl -X POST //send4sale.com/api/send/sms \
  -H "Authorization: Bearer demo_api_key_123" \
  -H "Content-Type: application/json" \
  -d '{
    "recipient": "+15551234567",
    "message":   "Hi {name}, your appointment is confirmed for Friday at 3pm."
  }'
event delivered
idmsg_demo_42
channelSMS
to+1 555 123 4567
sent_at12:42:09 UTC
delivered_at12:42:11 UTC
Pushed to your webhookPOST /webhooks/sent
The problem

SMBs lose customers because messaging is fragmented

Lead alerts arrive late. Appointment reminders are sent manually. Customer replies sit unread. Existing enterprise platforms are heavy, expensive, and need long contracts. Most small businesses end up with nothing automated at all.

The solution

One simple gateway for SMS, WhatsApp and webhooks

Send4Sale gives you a practical communication layer. Send SMS through Android devices you already own. Use WhatsApp through self-hosted gateway servers. Trigger messages from your CRM, store, or AI assistant via the API and webhooks. No long setup. No big contracts.

01

SMS via Android device

Use an Android phone as your SMS gateway. Your SIM, your plan, your control.

02

WhatsApp gateway

Send and receive WhatsApp messages via self-hosted gateway servers. Official Cloud API is available as a custom setup.

03

Webhooks and API

REST API with key-based authentication. Real-time webhooks for sent, received and delivery events.

04

Scheduling and alerts

Schedule messages, build automated reply actions, and route events to your business systems.

Use cases

What businesses actually use Send4Sale for

01

Lead alerts

Notify your sales team the second a new lead lands — from a form, a webhook, or your CRM.

02

Appointment reminders

Reduce no-shows. Send confirm and reminder messages and capture replies.

03

Payment reminders

Polite, capped reminders for outstanding invoices. Stops when the customer pays.

04

Odoo notifications

Send order, invoice, and CRM event notifications from Odoo to customers and staff.

05

Shopify order updates

Send order confirmations, shipping updates and abandoned-cart nudges from your Shopify store.

06

Developer webhook automation

Use webhook events as triggers for any custom workflow you can imagine.

See all use cases
How it works

Four steps to your first automated message

1. Connect a device or server

Link an Android phone for SMS, or connect a self-hosted WhatsApp gateway server.

2. Create an API key

Generate an API key in the dashboard with the permissions you need.

3. Trigger from your systems

Call the REST API from your CRM, store, ERP, or AI assistant. Or set up webhook events.

4. Track delivery

See delivery status, logs and replies in the dashboard. Forward events to your webhook URL.

Pricing

Simple, transparent plans

Fair-use limits, no surprise overages. Plans below come from the live system — your administrator can adjust them in the dashboard.

Plan

Starter

USD 0 / month
  • SMS sends30
  • SMS replies100
  • WhatsApp sends30
  • WhatsApp replies100
  • Saved contacts1
  • Scheduled messages1
  • API keys1
  • Webhooks1
  • Android devices1
  • WhatsApp accounts1
Plan

Enterprise

USD 170 / month
  • SMS sends50,000
  • SMS replies50,000
  • WhatsApp sendsFair use
  • WhatsApp repliesFair use
  • Saved contactsFair use
  • Scheduled messagesFair use
  • API keys25
  • Webhooks25
  • Android devices10
  • WhatsApp accounts10
Plan

Small

USD 60 / month
  • SMS sends10,000
  • SMS replies10,000
  • WhatsApp sendsFair use
  • WhatsApp repliesFair use
  • Saved contacts10,000
  • Scheduled messagesFair use
  • API keys1
  • Webhooks1
  • Android devices1
  • WhatsApp accounts1
Plan

Mini

USD 20 / month
  • SMS sends5,000
  • SMS replies5,000
  • WhatsApp sendsFair use
  • WhatsApp repliesFair use
  • Saved contacts15,000
  • Scheduled messagesFair use
  • API keys1
  • Webhooks1
  • Android devices1
  • WhatsApp accounts1
Plan

Ultra mini

USD 15 / month
  • SMS sends3,000
  • SMS replies3,000
  • WhatsApp sendsFair use
  • WhatsApp repliesFair use
  • Saved contacts3,000
  • Scheduled messagesFair use
  • API keys1
  • Webhooks1
  • Android devices1
  • WhatsApp accounts1

Plans displayed are live values from the system. Your administrator can adjust them.

Responsible usage

Built for legitimate business communication

Send4Sale is a communication layer for opt-in business messages. Users are responsible for consent and for following local laws and platform rules. We do not promote spam, mass cold messaging or deceptive content.

Responsible Use

Ready to automate your business messages?

Create a free account, connect a device or server, and send your first automated message in minutes.