Omnisend vs Postscript
A detailed breakdown of Omnisend and Postscript for e-commerce sellers. Last updated 2026-04-02.
Quick verdict
Omnisend scores highest overall (8/10), but the best choice depends on your use case.
Omnisend8/10 | Postscript7.5/10 | |
|---|---|---|
| Starting price | Free tier | Free tier |
| Overall score | 8/10Best | 7.5/10 |
| Ease of use | 9/10Best | 8/10 |
| Value for money | 9/10Best | 8/10 |
| Shopify | 9/10 | 10/10Best |
| Amazon | 1/10Best | 0/10 |
| Platforms | Shopify | Shopify |
| Free trial | Yes | Yes |
How they compare
What is Omnisend?
Omnisend is an email and SMS marketing platform built for e-commerce, with deep Shopify integration and AI features across every pricing tier including free. It occupies the same space as Klaviyo but at a significantly lower price point, making it the go-to choice for Shopify sellers who want marketing automation without a large upfront investment. Over 150,000 brands use Omnisend, and it holds a 4.8 rating on the Shopify App Store.
What is Postscript?
Postscript is an SMS marketing platform built exclusively for Shopify. Unlike Klaviyo and Omnisend which treat SMS as an add-on to email, Postscript treats it as a dedicated revenue channel with its own AI tools, automation engine, and conversational commerce features. Over 18,000 Shopify brands use Postscript, including Dr. Squatch and Brooklinen, and the platform reports an average 34x ROI on SMS spend.
Key differences
- •Omnisend scores 8/10 overall versus 7.5/10 for Postscript.
Omnisend
Postscript
Which is best for you?
Choose Omnisend if...
The best value email and SMS platform for Shopify stores. You get nearly every feature on the free plan, and the AI tools are practical rather than gimmicky.
Choose Postscript if...
The specialist SMS platform for Shopify. If SMS is a serious revenue channel for your store, Postscript's AI testing and conversational commerce features give it an edge over the SMS add-ons in Klaviyo and Omnisend.
Our verdicts
Omnisend -- 8/10
The best value email and SMS platform for Shopify stores. You get nearly every feature on the free plan, and the AI tools are practical rather than gimmicky.
Postscript -- 7.5/10
The specialist SMS platform for Shopify. If SMS is a serious revenue channel for your store, Postscript's AI testing and conversational commerce features give it an edge over the SMS add-ons in Klaviyo and Omnisend.