Email & SMS Marketing
Choose between Klaviyo, Attentive, Omnisend and Postscript for email and SMS, and plan what a migration or implementation takes at your size.
Common Questions
Klaviyo vs Omnisend vs Attentive: which is the right email-and-SMS stack for a $20M-$100M Shopify Plus brand?
Klaviyo wins email and segmentation for a $20M to $100M Shopify Plus brand; SMS (text messaging) is a separate decision. Add Attentive only when SMS has its own team, and Omnisend only when budget outranks segmentation depth. Klaviyo's SMS consent block runs on Plus checkout pages (Klaviyo Help Center, October 2026), so Attentive's checkout edge has narrowed.
Postscript vs Attentive: which one is the right SMS platform once a Shopify brand needs two-way conversational texting?
Postscript fits Shopify brands that answer two-way texts themselves; Attentive fits brands buying live agents, not staffing the inbox. Postscript publishes $0.007 to $0.009 per SMS (text message) plus carrier fees (Postscript's pricing page, October 2026), so Postscript can be priced without a sales call. Attentive publishes no SMS plan or per-message prices (Attentive pricing, October 2026).
Does Klaviyo support Shopify Markets for a multi-currency, multi-language mid-market brand?
Klaviyo supports Shopify Markets for region markets, syncing each customer's locale and a catalog localized by language and currency (Klaviyo Help Center, October 2026). Business-to-business (B2B) and Retail markets do not sync, and the sync runs on one account per store. Revenue shows under one currency symbol, unconverted, so report it by market from Shopify (Klaviyo Help Center, October 2026).
Does switching from Klaviyo to a Shopify-native-only email tool make sense once a brand hits Shopify Plus, or does Klaviyo stay worth it?
Klaviyo stays worth it for a Shopify Plus brand whose top flows run on data Shopify does not hold, such as reviews or loyalty. Shopify Messaging, Shopify's native tool, includes 10,000 free emails a month from Basic to Plus, then $1 per 1,000 up to 300,000 (Shopify Help Center, October 2026). So switch only when every flow uses Shopify data.
How long does a full Klaviyo migration off Mailchimp or ActiveCampaign realistically take for a $20M+ GMV Shopify Plus brand?
A Klaviyo migration for a $20M+ Shopify Plus brand runs on a month or more of sender warming, not build hours. Klaviyo opens volume over about 30 days without imported engagement history (Klaviyo Help Center, October 2026). A dedicated IP (Internet Protocol) takes about 30 to 40 days (IP warming guide, October 2026), so plan the cutover around warming.
Why would a Shopify brand pick Postscript over Attentive specifically for a Shopify-only (no other platform) tech stack?
Postscript wins a Shopify-only stack on published prices, not integration depth, because Shopify certifies both vendors for messaging (Shopify's partner list, October 2026). Only Postscript publishes per-message rates, $0.007 to $0.009 per SMS (text message) (Postscript's pricing page, October 2026). Even a standard short code ties at $750 a month (Postscript Help Center; Attentive Help Center, October 2026).