sms

Start with a compliance check: complete A2P 10DLC registration and set up a compliant opt-in flow with proper disclosure language. Then build the abandoned cart sequence first since it is the highest-ROI flow, followed by post-purchase and welcome flows.

Klaviyo SMS works best if you already use Klaviyo for email since it shares one subscriber profile. Postscript offers the deepest Shopify integration for SMS-first programs, 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. Checkout phone numbers only permit transactional messages directly related to that purchase.

Emojis force UCS-2 encoding, which cuts the segment size from 160 GSM-7 characters to 70 characters. A message that would be one segment becomes two, doubling the per-send cost across your entire list.

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 you should reduce frequency and segment by engagement level.

Use 10DLC for lists under 10K, toll-free for 10K-100K, and short codes for lists over 100K or sustained high-volume sending. Short codes support 100+ messages per second but cost $500-$1,000 per month plus setup.