Why SMS Performs
Open rates exceed 95% because SMS appears on the lock screen. Click-through rates run 8-14%, well above email. Buyers tolerate a maximum of 2-3 sends per week before opting out. Core use cases are cart recovery, win-back, and VIP releases.
The Setup Logic
- Opt-in layer at checkout (phone field plus consent checkbox)
- SMS provider (Klaviyo SMS, Postscript, or Attentive)
- Sequence trigger per use case
- Frequency cap at 2-3 sends per week
- Compliance audit (TCPA, GDPR)
A wellness brand built a WhatsApp funnel that now accounts for 22% of revenue. It runs quietly because buyers opted in voluntarily. Compliance is a prerequisite; without proper opt-in there is real account risk.
What Does Not Work
Generic promotional SMS (too spammy). High frequency (opt-out risk). SMS without opt-in (illegal). SMS is a discipline channel, not a volume channel.
„SMS is a 95% open rate. With discipline it is a lever; without discipline it is a liability.”
