Shopify app comparison · updated Aug 25, 2026
Klaviyovs
Omnisend Email Marketing & SMS
Compare Klaviyo and Omnisend Email Marketing & SMS for Shopify email marketing using current ratings, review activity, pricing, features, and OngoingAI-observed adoption.
Klaviyo
Klaviyo: Email Marketing & SMS
Build email marketing, SMS, and WhatsApp campaigns powered by AI to grow ecommerce sales.
- Rating
- 4.70
- Reviews
- 3,007
- Review growth · 30d
- +54 · +1.8%
- Pricing
- Free to install
- Years on Shopify
- 14
- Stores observed
- 34,411
Omnisend
Omnisend Email Marketing & SMS
Run email marketing & SMS campaigns with AI marketing tools. Collect emails with popups & sell more.
- Rating
- 4.80
- Reviews
- 2,955
- Review growth · 30d
- +3 · +0.1%
- Pricing
- Free to install
- Years on Shopify
- 12
- Stores observed
- 4,857
Our read
- Ratings
- Omnisend Email Marketing & SMS higher (4.80 vs 4.70)
- Review growth
- Klaviyo faster (+1.8% vs +0.1%)
- Adoption
- Klaviyo larger (34,411 vs 4,857)
OngoingAI's data favors Klaviyo on observed Shopify adoption (34,411 vs 4,857 stores), with faster recent review growth.
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 | Klaviyo | Omnisend Email Marketing & SMS | Difference |
|---|---|---|---|
| Rating | 4.70 | 4.80 | Omnisend Email Marketing & SMS +0.10 |
| Reviews | 3,007 | 2,955 | Level |
| Review growth · 30d | +54 · +1.8% | +3 · +0.1% | Klaviyo faster |
| Listed pricing | Free to install | Free to install | Not directly comparable |
| Years on Shopify | 14 | 12 | Klaviyo +2y |
| Stores observed | 34,411 | 4,857 | Klaviyo leads |
Which fits your requirements?
Choose by what you actually need.
Choose Klaviyo if…
- You need follow-up emails
- You need bulk editing
- Recent review-growth signals matter to you
- A larger observed Shopify footprint is reassuring
Choose Omnisend Email Marketing & SMS if…
- You need landing pages
- You need translation
- A higher App Store rating is a priority
Tied to observable requirements only — listed capabilities, ratings, review growth, adoption and price. It doesn’t assert usability or support quality.
Feature differences
95% of listed capabilities overlap.
These apps cover largely the same ground. The decision material is what each lists that the other doesn’t.
Klaviyo only
2
- Follow-up emails
- Bulk editing
Omnisend Email Marketing & SMS only
2
- Landing pages
- Translation
Show 38 shared capabilities
- Email marketing
- Email campaigns
- SMS campaigns
- Push notifications
- Newsletters
- Pop-ups
- Forms
- Discounts
- Promotions
- Upsell emails
- Cross-sell emails
- Cart emails
- Checkout emails
- Exit intent
- Abandoned cart
- Browse abandonment
- Welcome emails
- Price drop emails
- Back-in-stock emails
- Win-back emails
- Product recommendations
- Drip campaigns
- Subscriptions
- Product reviews
- Custom campaigns
- Editor tool
- Templates
- AI generation
- Localization
- Custom code
- Custom fonts
- Import and export
- Email domains
- Consent collection
- Email capture list
- SMS capture list
- Triggers and rules
- Automations
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.
Klaviyo
34,411
stores observed
Skews Shopify · 89%
Omnisend Email Marketing & SMS
4,857
stores observed
Skews Shopify · 84%
Scope
What this comparison measures.
What it measures
Shopify App Store ratings, review counts and 30-day review growth, listed pricing and capabilities, category data, and OngoingAI-observed storefront adoption for Klaviyo and Omnisend Email Marketing & SMS.
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 Aug 25, 2026.
See who’s switching — as it happens.
Track app adoption on live ecommerce stores. Find merchants running Klaviyo or Omnisend Email Marketing & SMS, follow stack changes, and see when a store installs, removes, or replaces an app.