Summarize this buying guide. Preserve named providers, plan terms, source dates and billing units. Separate documented scope from the author's judgment. Do not invent prices, product features or outcomes.

The best Shopify SMS marketing apps for most brands come down to Postscript, Recart, TxtCart, Klaviyo and Attentive, and the right one depends on how you want to pay and who runs the program. Postscript suits a brand that wants published usage rates, monthly billing and its own team at the controls. Recart combines list-growth tools with an SMS scope on a committed term; confirm the managed work in the proposal. TxtCart suits a smaller store that wants a low entry price tied to order volume and an AI agent billed per resolution. Klaviyo suits a brand that wants SMS on the same profile as email. Attentive suits a larger retail program that wants live agents and AI answering shoppers.

Name the primary sender for each campaign or flow. Then establish who answers a shopper reply, what context they receive and which product or service the proposal includes. That avoids buying a messaging program while leaving its conversation responsibilities undefined.

Based on the linked provider pricing and product documentation .

Sources checked: 12 November 2026.
https://txtcart.ai/pricing/
https://recart.com/sms-marketing-pricing-ecommerce
https://www.klaviyo.com/products/sms-marketing
https://www.attentive.com/concierge
https://postscript.io/pricing
https://zobi.com/dtc/