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Airdun can reach a customer through four channels. You connect each channel once for your workspace, under Channels in the sidebar. Each use case (Renewals, Free trials, New customers) then turns on the channels it uses, on its own page under Autopilot. Which channels a given case can use also depends on the contact data available for that customer, from Stripe or your customer enrichment.

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Available channels

Email

Sent from your own verified domain. Every email includes a single link to update the card and settle the balance.

SMS

Short text reminders sent under your brand name, once your customers’ consent is confirmed. Every text carries the payment link.

WhatsApp

Short reminders from a WhatsApp Business number, using message templates approved by Meta. Shown once it is available on your account.

In-App Wall

A message shown inside your product while the invoice is unpaid, dismissible by default, with an optional hard lock. Requires the Airdun script in your app.

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How channels are used

On Renewals and Free trials, Airdun picks the channel for each message case by case, among the channels the use case uses and that can reach the customer. See Recovery Strategy. New customers follows a fixed sequence instead: one email, then one text if the invoice is still unpaid, within the day the payment failed. A use case needs at least one channel Airdun can send a message on (email, SMS, or WhatsApp) before it can go live. The in-app wall alone is not enough.

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Timing and language

All outreach is timed to the customer’s local time zone, and messages are translated automatically into the customer’s language: a customer in Germany receives a message in German with no setup. Each use case sets its own detection and fallbacks; see Use Case Settings.

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Escalation

When a new case matches one of the use case’s escalation rules, Airdun sends nothing on it and alerts your team, so a person can take over. Rules are set per use case under Autopilot → [use case] → Escalation rules. See Use Case Settings.

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Enabling channels

Each channel has its own prerequisites: a verified sending domain for email, a sender name and confirmed consent for SMS, a connected number for WhatsApp, the script for the in-app wall. See Channels Setup.