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.

Postscript Shopper is a set of AI agents inside Postscript that decide and write one-to-one messages for each subscriber. Postscript names four on its Shopper page. Responses handles conversations when a subscriber texts in. Automations decides each subscriber's next message and replaces welcome, abandonment and lifecycle flows. Campaigns decides who should get a campaign and what it should say. Ask Shopper lets you search and query what customers are telling you. All of them draw on the voice, offers, FAQs and catalogue you set in Brand Center.Shopper works across SMS and RCS today, and Postscript says more channels are coming. Every brand starts with Brand Centre and Shopper Responses, then can expand into Shopper Automations and Campaigns (Alpha), in Postscript's wording. The Shopper page does not publish a price and routes you to a demo instead.

Postscript: Shopper, AI-powered 1:1 marketing journeys https://postscript.io/shopper
Zobi for DTC: product page https://zobi.com/dtc/