Mailchimp vs Postscript

Mailchimp is an all-in-one email marketing and automation platform with AI writing and send-time optimization, while Postscript is an SMS marketing platform built only for Shopify stores, so the choice comes down to channel and platform.

Quick answer: Mailchimp is the better choice for mailchimp fits small businesses, e-commerce stores, creators, and marketing teams that want approachable all-in-one email marketing with a bit of AI help and a free tier to start.; Postscript is the better choice for postscript fits Shopify and Shopify Plus brands of nearly any size, from early-stage stores testing SMS to large operations that want a compliant, AI-assisted texting channel..

Last updated July 2, 2026

The verdict

Pick Mailchimp if you want one approachable hub for email marketing, whatever platform your store runs on. It combines list building, campaign design, automation journeys, segmentation, and a lightweight CRM, with AI that drafts subject lines and copy, recommends send times, and personalizes content. A free tier and a $13/mo entry point make it easy for small businesses and creators to start, though costs rise quickly with list size and advanced automation is gated to higher tiers.

Pick Postscript if you run on Shopify and want SMS as a real sales channel. It reads order and customer data directly, so automations like abandoned-cart reminders reference actual products and purchase history. Its AI plan adds on-brand generation via Brand Center, Infinity Testing across many variants, and the Shopper assistant that answers product questions over text and nudges shoppers toward checkout, while a built-in compliance engine and in-house legal team manage carrier rules. Off Shopify it is not an option, and per-message costs grow with volume.

The channels differ enough that some Shopify brands will run both, but a store choosing one budget line should note the ratings: Postscript holds 4.6 to Mailchimp's 4.1.

Mailchimp

Freemium

Mailchimp is an email marketing and automation platform with AI features that help write campaigns, generate content, optimize send times and personalize messages. It's a popular all-in-one choice for small businesses.

Best for: Mailchimp fits small businesses, e-commerce stores, creators, and marketing teams that want approachable all-in-one email marketing with a bit of AI help and a free tier to start.

Try Mailchimp →

Postscript

Freemium

Postscript is an SMS marketing platform made for Shopify, covering list growth, campaigns, automations, and two-way replies. Its AI plan adds on-brand message generation, large-scale testing, and a 1:1 shopping assistant.

Best for: Postscript fits Shopify and Shopify Plus brands of nearly any size, from early-stage stores testing SMS to large operations that want a compliant, AI-assisted texting channel.

Try Postscript →

Side-by-side comparison

	Mailchimp	Postscript
Pricing	Freemium	Freemium
Starts at	USD 13.00	USD 0.00
Free trial	Yes	Yes
Rating	4.1	4.6

Pricing compared

Mailchimp starts free for small lists, with paid plans from $13/mo that scale by contacts, sends, and advanced automation. Costs rise quickly as lists grow, and advanced automation is gated to higher tiers. Postscript charges platform fees plus per-message costs: Starter has a $0 platform fee with a monthly minimum, Growth runs $100/mo, and Professional is $500/mo, with Enterprise quoted on request and the AI plan priced separately. New stores get a 30-day trial backed by $100 in messaging credit. The models differ: Mailchimp spend tracks list size, while Postscript spend tracks message volume.

Features compared

Mailchimp is an all-in-one email marketing hub: list building, campaign design, automation journeys, segmentation, and a lightweight CRM. Its AI drafts subject lines and email copy, generates on-brand creative, recommends send times, and personalizes content based on audience behavior. Postscript is SMS only and Shopify only. It reads order and customer data directly, so messages reference real products and purchase history, and it covers list growth, campaigns, two-way replies, and automations like welcome flows and abandoned-cart reminders. Its AI plan adds a Brand Center trained on your voice, Infinity Testing that spins up many message variants at once, and Shopper, a 1:1 assistant that answers product questions and nudges shoppers toward checkout, with compliance handled in the background.