go-notification

Fonnte is a popular Indonesian WhatsApp gateway. It's cheap, the dashboard is in Bahasa Indonesia, and setup is minutes instead of weeks.

Unofficial API

Fonnte uses the unofficial WhatsApp Web protocol. Against WhatsApp Terms of Service — number ban is possible. Fine for low-volume ops, internal tools, and MVPs; not recommended for mission-critical customer comms.

Pricing

Trial — free, limited messages for evaluation.
Paid — from around Rp 25,000 / month (≈ $1.50 USD) for basic plans. Pricing scales with message volume and number of devices.
Check https://fonnte.com/pricing for current rates.

Setup

Register at https://fonnte.com.
Add a device and scan the QR code with your WhatsApp phone.
Copy the device token from the Fonnte dashboard.

main.go

import "github.com/gopackx/go-notification/channel/whatsapp/fonnte"

notifier.RegisterChannel("whatsapp", fonnte.New(fonnte.Config{
    Token: os.Getenv("FONNTE_TOKEN"),
}))

Configuration reference

Field	Type	Required	Description
`Token`	`string`	yes	Fonnte device token. One token per connected WhatsApp number.
`BaseURL`	`string`	no	Override the API base URL. Default: `https://api.fonnte.com`.
`Timeout`	`time.Duration`	no	HTTP timeout per send. Default: `30s`.

Sending

main.go

func (n OrderShipped) ToWhatsApp(u notification.Notifiable) *whatsapp.Message {
    return whatsapp.NewMessage().
        Text("Halo! Pesanan " + n.OrderID + " sudah dikirim.")
}

Recipients from RouteNotificationFor("whatsapp") should be in E.164 format (628123456789) or local format (08123456789) — Fonnte accepts both for Indonesian numbers.

Tips

One token per number. If you want redundancy, register multiple devices and round-robin between channel names (whatsapp-a, whatsapp-b).
Rate limit yourself. Don't blast messages — that's the fastest way to get the number flagged by WhatsApp.
Respect opt-out. Especially for marketing, always honor user opt-outs, or you'll get reported and lose the number.
Consider Meta Cloud API if this becomes customer-critical. The migration path is a Via() change plus a new channel registration.