Kanal vs Postscript: the honest comparison
A Kanal vs Postscript comparison for Shopify merchants choosing between SMS and WhatsApp marketing.
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: a closer look
Kanal vs Postscript: side by side
| Comparison | Kanal | Postscript |
|---|---|---|
| Primary channel | WhatsApp and SMS: rich, two-way WhatsApp conversations, with SMS campaigns and automations from the same app | SMS and MMS first, the channel US shoppers expect from DTC brands |
| Shopify integration | Built Shopify-first: products, carts, and orders sync automatically | Also built exclusively for Shopify, with deep store data behind its SMS flows |
| Message format | Images, product cards, buttons, and catalog inside one WhatsApp thread | Short-form SMS text plus MMS images, built to convert with a link |
| Conversational AI | AI agent trained on your catalog, orders, and policies; answers, sells, escalates | AI tuned for SMS: campaign copy, send optimization, and reply handling |
| Geographic strength | Europe, LATAM, and international markets where WhatsApp is the default app | US and Canada, where SMS marketing is standard practice |
| Pricing model | Flat subscription plus pass-through WhatsApp message fees | Platform fee by tier plus per-message SMS/MMS rates, listed for US and Canada |
| What gets billed | Meta bills each delivered WhatsApp message by category and country; messages your customers send are not charged | Each SMS segment and MMS is billed, and international sends use a separate rate card |
| Compliance | WhatsApp opt-in plus Meta-approved templates keep sends compliant | TCPA compliance hard-wired into subscriber collection and sending |
Why brands switch to Kanal
Built for where your customers actually chat
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.
Rich conversations instead of 160 characters
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.
Costs that stay predictable as you expand internationally
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.
What Shopify brands say about Kanal
“Nuestras automatizaciones ya estaban en marcha, pero lejos de estar optimizadas. El equipo de Kanal rehízo cada flujo, añadió algunos y lanzó pruebas A/B. Nuestros ingresos despegaron de verdad.”
“No hago e-commerce clásico, hago drops. Kanal adaptó mis automatizaciones para que fueran muy potentes en engagement y reforzaran mi marca personal. Justo lo que necesitaba.”
“Desde que pasamos al marketing por WhatsApp con Kanal, el engagement de nuestros clientes ha despegado. Sinceramente, la mejor decisión que hemos tomado este año.”
When Postscript is the better choice
Postscript 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.
Frequently asked questions
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.
Ready to make WhatsApp your best Shopify channel?
Install Kanal and turn WhatsApp into automated revenue: abandoned cart recovery, broadcasts, order notifications, and an AI chatbot, all native to Shopify.
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