Side-by-side comparison
Postscript vs Omnisend
Compare Postscript and Omnisend across pricing, features, and fit for your e-commerce stack.
Omnisend
Email, SMS, and push notifications in one automation workflow
FreemiumQuick Comparison
About
Postscript
Postscript is the SMS marketing platform built exclusively for Shopify, which means the integration is native rather than bolted on. Subscriber segmentation pulls directly from Shopify order data, compliance is handled by default, and two-way conversational texting lets your support and sales team engage in real threads rather than broadcast blasts. The focus is narrow by design: if you also want email in the same tool, look at Klaviyo. But if SMS is your primary retention channel and you are on Shopify, Postscript is the most operator-friendly option in the market. Pricing scales with subscriber count, and the free tier is generous enough to validate the channel before committing.
Omnisend
Omnisend sits in a crowded category but earns its place by making omnichannel marketing genuinely straightforward. Most platforms treat SMS as a bolt-on to email. Omnisend builds a single automation canvas where email, SMS, and push notifications share the same triggers, branching logic, and exit conditions. An abandoned cart sequence can email at hour one, text at hour four, and send a push notification the next morning without needing three separate tools or any duplicated configuration. The free tier is meaningfully generous. Up to 500 emails per day to 250 contacts with no credit card required, which is more runway than most early stores need to figure out whether email is moving the needle. Pricing beyond free scales more predictably than Klaviyo, which makes Omnisend the more cost-effective choice for stores that have not yet hit the revenue level where Klaviyo's analytics depth justifies the premium. Where Omnisend trades off against Klaviyo is in the sophistication of its segmentation and predictive analytics. Klaviyo's ability to forecast churn, predict next purchase date, and build deeply behavioural segments is genuinely ahead of the field. Omnisend covers the standard segmentation use cases well but does not go as far. For most Shopify stores under a few million in annual revenue, that difference rarely matters in practice. For brands running large, complex lists with meaningful LTV variation, it eventually does.
Key Features
Postscript
Shopify-Native Data
Direct integration pulls Shopify order history, customer tags, and purchase data into every subscriber profile for precise segmentation.
Two-Way Texting
Subscribers can reply to campaigns and receive real responses from your team, making SMS a genuine conversation channel rather than a broadcast.
Compliance Engine
Automated opt-in confirmation, quiet hours enforcement, TCPA compliance checks, and keyword opt-outs are built into every send by default.
Subscriber Segmentation
Slice your list by Shopify data — purchase count, product bought, LTV, order value, or last active date — for hyper-targeted campaigns.
Omnisend
Omnichannel Automation
Build a single automation workflow that orchestrates email, SMS, and push notifications together, triggered by the same Shopify events without duplicating logic across tools.
Generous Free Tier
Send up to 500 emails per day and reach 250 contacts completely free, no credit card required. Scales affordably as your list grows, with pricing well below Klaviyo at equivalent volumes.
Pre-Built E-Commerce Flows
Launch abandoned cart, welcome series, order confirmation, and win-back automations in minutes using battle-tested templates built specifically for Shopify and WooCommerce.
Revenue Attribution
Tracks revenue generated by every email, SMS, and automation so you see exactly which messages are driving purchases, not just opens and clicks.
Screenshots
Postscript
Omnisend
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