Add WhatsApp to your software in 5 minutes.
Your customers connect through Meta Embedded Signup in around 60 seconds — they scan a QR, nothing else. With Coexistence, existing WhatsApp Business numbers stay active on their phone. Your software gets the API and webhooks.
First connection free · 60-second customer onboarding · Coexistence supported
<!-- 1. Load the widget -->
<script src="https://fusionwa.com/sdk/v1.js"></script>
<div id="wa-widget"></div>
<!-- 2. Initialize -->
<script>
FusionWA.init({
apiKey: "fwa_live_abc123",
customerId: currentUser.id,
containerId: "wa-widget",
});
</script>
How it works
Ready in three steps.
Three steps.
From code to your customer's first live WhatsApp connection, in about 5 minutes.
Embed the widget
Add 3 lines of HTML to your software. The FusionWA widget automatically appears in your customers' interface, ready to connect.
3 lines of code · no dependencies
Customer connects through Meta
The customer launches Meta Embedded Signup directly from your software. For WhatsApp Business App numbers eligible for Coexistence, Meta guides them through — including a QR scan when required — keeping the number active on their phone.
Meta Embedded Signup · Coexistence where eligible
Send and receive
Use our REST API to send template messages from your backend. Receive incoming messages and status updates via webhooks to your endpoint, in real time.
REST API · real-time webhooks
Why FusionWA
Stop building infrastructure.
Focus on your product.
Implementing WhatsApp Business Cloud API from scratch takes weeks. FusionWA handles the entire infrastructure layer.
Building it yourself
What you need to implement without FusionWA:
- Implement Meta Embedded Signup
- Manage WABA tokens and refresh
- Handle Coexistence and Meta heartbeat
- Route webhooks per customer
- Sync connection states
- Map connections to tenants
- Keep up with Meta API changes
With FusionWA
What you get immediately:
- Embedded Signup already implemented
- Coexistence supported natively
- REST API + webhooks ready
- Multi-customer management included
- First connection free
- Per-connection pricing, no fixed cost
- Meta API compatibility maintained
Built for
Built for software companies.
Not for end users.
FusionWA integrates into your product. Your customers connect their own WhatsApp Business accounts — your software gets the API.
CRM
Automated follow-ups, lead management
Booking software
Appointment confirmations, reminders
Property management
Tenant communications, viewings
Beauty & salons
Reminders, promotions, retention
Hospitality
Check-in info, concierge messages
Healthcare & clinics
Appointment reminders, results
Automotive
Workshop updates, quotes
Fitness & sport
Class reminders, membership renewals
Why WhatsApp in 2026
Your clients are already on WhatsApp.
Your software isn't.
In 2026, WhatsApp isn't optional — it's the channel your clients expect. Those who don't integrate it lose customers. Those who do, keep them.
SMS: real limitations.
SMS works, but has structural limits that WhatsApp solves natively.
- ✕Low open rates compared to WhatsApp — business SMS messages are often ignored or filtered as spam.
- ✕Text only. No images, PDFs, audio, video, interactive buttons, or structured templates.
- ✕Zero read receipts. No way to know if the client actually read the message.
- ✕Fixed and rising per-message costs. WhatsApp Business API uses a conversation-based pricing model, not per individual message.
WhatsApp is Meta's official channel for business communication — with dedicated infrastructure, templates, and API.
Your clients are already asking for it.
You don't need to convince them — they're the ones asking. The question is: is your software ready to answer?
- ✓"Can I reach you on WhatsApp?" — the question your end clients ask businesses every day.
- ✓WhatsApp is the dominant messaging app in Italy and Europe. It's where people already communicate.
- ✓WhatsApp communication is perceived as more direct and personal than email or SMS.
- ✓Software houses that integrate WhatsApp differentiate their product on something clients see and use every day.
Features
Everything you need.
Nothing more.
SDK Widget
Paste 3 lines into your software. Your clients connect to WhatsApp Business on their own, without you dealing with OAuth or Meta tokens.
FusionWA.init({
apiKey: "fwa_live_...",
customerId: user.id,
containerId: "widget",
});REST API
Send template messages, receive notifications, manage connections. A clean JSON API authenticated with API Keys.
curl -X POST https://fusionwa.com/api/v1/messages/send \
-H "X-FusionWA-API-Key: fwa_live_..." \
-H "Content-Type: application/json" \
-d '{
"to": "+39 02 1234567",
"templateName": "hello_world",
"languageCode": "it"
}'
# → { "messageId": "wamid.abc123..." }Real-time Webhooks
Every message and status change reaches your endpoint in milliseconds. Zero polling, zero message storage on our end.
app.post("/webhook/whatsapp", (req, res) => {
const { type, from, text } = req.body;
// type: "message" | "status" | "template_status"
console.log(`Message from ${from}: ${text}`);
res.sendStatus(200);
});Coexistence
Your clients keep the WhatsApp Business app on their phones. Receive on mobile, send via API — in parallel, without conflicts.
// No extra configuration needed.
// FusionWA automatically manages
// the Coexistence heartbeat with Meta.
//
// The number stays active on both
// the mobile app and the Cloud API.Pricing
No subscription.
Pay only for active connections.
First connection at €0. From the second onward you pay in brackets — the more clients you have, the less you pay per connection.
Free
First connection at €0, no expiry.
Starter
From the 2nd to the 9th connection. Pay only for active ones.
Most popular
Growth
From the 10th to the 24th connection. Lower price as you grow.
Scale
From the 25th connection onward. Best price for high volumes.
No subscription, no fixed costs. Add and remove connections at any time.
Graduated pricing: each connection is billed at its tier rate. Adding your 10th connection does not retroactively raise the price of the first 9.