A Kanal vs Postscript comparison for Shopify merchants choosing between SMS and WhatsApp marketing.
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Postscript is one of the leading SMS marketing platforms for Shopify: built exclusively for Shopify stores, tuned for US audiences, with TCPA compliance wired into its list growth and sending tools. Kanal sends WhatsApp and SMS campaigns and automations from one app connected to a Shopify store. It is built for stores whose customers live in Europe, Latin America, or anywhere WhatsApp is the default inbox, and for brands that want rich two-way WhatsApp conversations, with images, catalog, and an AI agent, next to their texts. If you sell on Shopify and are weighing SMS against WhatsApp, this comparison shows where each channel and each tool is strongest.
Kanal vs Postscript for Shopify merchants: US-first SMS marketing next to WhatsApp and SMS in one app. Message format, geography, billing and compliance.
SMS reach is strongest in the US. Across Europe, Latin America, and much of Asia, WhatsApp is the default messaging app. If a growing share of your revenue comes from outside North America, Kanal puts your brand in the inbox those customers already use every day.
An SMS is a short prompt with a link. A WhatsApp thread carries product images, a browsable catalog, buttons, and an AI agent that answers questions from your live store data and closes the sale in the same conversation. For cart recovery and product discovery, that difference shows up directly in conversion.
Per-message SMS economics are tuned for the US and Canada; sending abroad is priced country by country on a separate rate card and long threads multiply the cost. On WhatsApp, Meta bills each delivered message at a published rate set by message category and by the country of the recipient, on one public rate card, and messages your customers send you are not charged.
“Setting up was incredibly easy. Within 15 minutes we were sending our first recovery campaign and seeing results immediately.”
GaëtanCeo, Barz“Our customer engagement has increased by 300% since switching to WhatsApp marketing with Kanal. Best decision we made.”
AlexandreFounder, Mushngo“The AI chatbot handles 80% of our support queries automatically. Our team can now focus on what matters most.”
AbdelCEO, OdorPostscript is the better choice when your revenue is US-first. American shoppers are used to SMS marketing, short texts convert there, and Postscript pairs that with a Shopify-exclusive focus, TCPA compliance built into its tooling, and years of SMS-specific expertise across a large DTC brand roster. If most of your list has a +1 number and SMS is your core owned channel, Postscript is an excellent tool.
Choose Kanal if you want WhatsApp and SMS in one Shopify app, especially if your customers are in Europe, LATAM, or anywhere WhatsApp is the default inbox; choose Postscript if your revenue is US-first and SMS is your core owned channel.
Kanal sends WhatsApp and SMS for Shopify merchants, including those whose customers are in Europe, Latin America, or other markets where WhatsApp dominates. Postscript is SMS marketing for Shopify, strongest with US audiences. Both plug into your store data; the difference is the channel your customers actually read.
Yes. Some brands with a split audience keep Postscript for their US SMS program and use Kanal for WhatsApp with European and international customers. Kanal also sends SMS, so the two tools overlap on that channel: each channel keeps its own opt-in, and segmenting by country keeps the sends from overlapping.
It depends on where your customers are. If your list is mostly US numbers, SMS remains a strong channel. If your European or international share is growing, WhatsApp brings richer formats and per-message pricing published by Meta for each country, and Kanal customer Jean Fourche reports a 96 percent open rate in its case study on our case studies page, which is why many brands add it as their next channel rather than a replacement.