Shopify app comparison · updated Sep 16, 2026
Omnisend vs Postscript
Compare Omnisend and Postscript for Shopify using current ratings, review activity, pricing, features, and OngoingAI-observed adoption.
Omnisend
Omnisend Email Marketing & SMS
Run email marketing & SMS campaigns with AI marketing tools. Collect emails with popups & sell more.
- Rating
- 4.70
- Reviews
- 3,184
- Review growth · 30d
- +234 · +7.9%
- Pricing
- Free to install
- Years on Shopify
- 12
- Stores observed
- 11,136
Postscript
Postscript SMS Marketing
Create and execute SMS programs to drive incremental revenue by engaging customers via text message
- Rating
- 4.70
- Reviews
- 1,206
- Review growth · 30d
- +60 · +5.2%
- Pricing
- Free to install
- Years on Shopify
- 8
- Stores observed
- 4,164
Our read
Omnisend has the stronger observed market footprint in OngoingAI's data — it appears on 2.7× more tracked stores and carries 2.6× the App Store review depth. Ratings and recent review growth are closer.
- Rating
- Level4.7 vs 4.7
- Review growth
- Omnisend faster+7.9% vs +5.2%
- Review depth
- Omnisend2.6× more reviews
- Observed adoption
- Omnisend2.7× more tracked stores
Review trajectory
How each app's Shopify reviews are moving.
Daily App Store review counts since we began tracking — who's gaining reviews fastest, who holds the larger base, and how the race is developing.
Omnisend Email Marketing & SMS leads total reviews and is adding them fastest over the tracked window.
Reviews each app has gained since the start of this tracking window. · Tracking window · Aug 18 – Sep 15, 2026
Head-to-head
The signals, side by side.
Each row reads straight from the live App Store listing and OngoingAI’s census. The Difference column states the gap — not a buyer recommendation.
| Dimension | Omnisend | Postscript | Difference |
|---|---|---|---|
| Rating | 4.70 | 4.70 | Level |
| Reviews | 3,184 | 1,206 | Omnisend 2.6× |
| Review growth · 30d | +234 · +7.9% | +60 · +5.2% | Omnisend faster |
| Listed pricing | Free to install | Free to install | Not directly comparable |
| Years on Shopify | 12 | 8 | Omnisend +4y |
| Stores observed | 11,136 | 4,164 | Omnisend leads |
Review corpus
What merchants actually report.
Omnisend
4.75 avg · 2,979 reviews
Postscript
4.86 avg · 1,154 reviews
| Signal | Omnisend | Postscript | Difference |
|---|---|---|---|
| 5-star share | 90% | 95% | Postscript leads |
| Rating · last 90 days | 4.70 | 1.33 | Omnisend leads |
| Replies to reviews | 38% | 0% | Omnisend leads |
| Replies to critical (≤3★) | 86% | 5% | Omnisend leads |
| Long-term reviewers (1yr+) | 29% | 13% | Omnisend leads |
| Top market | United States 45% | United States 92% | — |
| Reviews analyzed | 2,979 | 1,154 | — |
Based on public merchant reviews, with newer feedback given more weight. OngoingAI matches each review to an identifiable store and the app they use.
Which fits your requirements?
Choose by what you actually need.
Choose Omnisend if…
- You need email marketing
- You need email campaigns
- You need sms campaigns
- Recent review-growth signals matter to you
Choose Postscript if…
- You need sms notifications
- You need pop-up builder
- You need triggers
Tied to observable requirements only — listed capabilities, ratings, review growth, adoption and price. It doesn’t assert usability or support quality.
Feature differences
What Omnisend and Postscript each do that the other doesn’t.
They cover largely the same ground — 5% of listed capabilities overlap. The decision material is the rest: what each lists that the other doesn’t.
Omnisend only
38
- Email marketing
- Email campaigns
- SMS campaigns
- Push notifications
- Newsletters
- Pop-ups
- Forms
- Landing pages
- Discounts
- Promotions
- Upsell emails
- Cross-sell emails
- Cart emails
- Checkout emails
- Exit intent
- Browse abandonment
- Welcome emails
- Price drop emails
- Back-in-stock emails
- Win-back emails
- Product recommendations
- Drip campaigns
- Subscriptions
- Product reviews
Postscript only
14
- SMS notifications
- Pop-up builder
- Triggers
- A/B testing
- SMS marketing
- Compliance
- Personalized messages
- Scheduled messages
- Two-way messaging
- Segmentation
- Opt-in
- Cart recovery
- Welcome messages
- One-time password (OTP)
2 shared capabilities
- Abandoned cart
- Templates
Observed adoption
Who actually runs each, on real stores.
The stores OngoingAI’s weekly census observes running each app, and the platform each skews toward — observed presence, not vendor-reported install totals.
Omnisend
11,136
stores observed
Skews Shopify · 88%
Postscript
4,164
stores observed
Skews Shopify · 100%
Scope
What this comparison measures.
What it measures
Shopify App Store ratings and review counts, rating distribution, developer reply rates, reviewer tenure and geography, listed pricing and capabilities, category data, and OngoingAI-observed storefront adoption for Omnisend and Postscript.
What it doesn’t
Hands-on usability, customer-support quality, deliverability, merchant sentiment from review text, or revenue impact. We draw a sharp line around what we can observe.
Methodology
Where the numbers come from.
Ratings, review counts, pricing, and categories come from the live Shopify App Store listing, refreshed daily. Review growth compares the observed snapshots across the trailing 30-day window. “Stores observed” and the platform split come from OngoingAI’s weekly storefront census — the real stores running each app, not the listing’s claimed totals. Comparison generated Sep 16, 2026.
See who’s switching — as it happens.
Track app adoption on live ecommerce stores. Find merchants running Omnisend or Postscript, follow stack changes, and see when a store installs, removes, or replaces an app.