sms

Use a 3-message flow: Send 1 at 30 minutes after abandonment with a gentle reminder and no discount, Send 2 at 4 hours with soft urgency, and Send 3 at 24 hours with a discount if margins allow. Each message needs a sender ID, one CTA with a short link, and roughly 160 GSM-7 characters.

Klaviyo SMS is the default pick if you already use Klaviyo for email, since it shares one subscriber profile. Postscript offers the deepest Shopify-specific SMS features, while Attentive suits mid-market brands wanting full-service support.

No. TCPA requires express written consent for marketing SMS, captured with clear disclosure language, frequency expectations, and STOP/HELP instructions. Violations carry $500-$1,500 per message in statutory damages, and checkout phone capture alone does not qualify as marketing consent.

A2P 10DLC registration is required since 2022 for US businesses sending SMS through 10-digit long codes. Without it, carriers throttle or filter your messages. Registration covers brand verification, campaign use case, sample messages, and opt-in documentation through The Campaign Registry.

Emojis force UCS-2 encoding, which cuts the segment size from 160 GSM-7 characters to 70. A message that would be one segment becomes two, doubling the per-send cost. Limit usage to one emoji per message and preview segment counts before scheduling.

Healthy opt-out rates are under 2% per send overall and under 0.5% for promotional sends. Rates above that signal over-sending or poor relevance, and the fix is reducing frequency, segmenting by engagement, and running reactivation flows for cold subscribers.