Shopify app comparison · updated Oct 1, 2026
Klaviyo vs Omnisend
Compare Klaviyo and Omnisend 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
- 3,335
- Review growth · 30d
- +75 · +2.3%
- Pricing
- Free to install
- Years on Shopify
- 14
- Stores observed
- 79,328
Omnisend
Omnisend Email Marketing & SMS
Run email marketing & SMS campaigns with AI marketing tools. Collect emails with popups & sell more.
- Rating
- 4.70
- Reviews
- 3,178
- Review growth · 30d
- +214 · +7.2%
- Pricing
- Free to install
- Years on Shopify
- 12
- Stores observed
- 13,031
Our read
Klaviyo has the stronger observed market footprint in OngoingAI's data — it appears on 6.1× more tracked stores. Ratings and recent review growth are closer.
- Rating
- Level4.7 vs 4.7
- Review growth
- Omnisend faster+7.2% vs +2.3%
- Review depth
- Similar volume
- Observed adoption
- Klaviyo6.1× 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.
Klaviyo leads total reviews, while Omnisend Email Marketing & SMS is adding them faster over the tracked window.
Reviews each app has gained since the start of this tracking window. · Tracking window · Sep 2 – Oct 1, 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 | Klaviyo | Omnisend | Difference |
|---|---|---|---|
| Rating | 4.70 | 4.70 | Level |
| Reviews | 3,335 | 3,178 | Level |
| Review growth · 30d | +75 · +2.3% | +214 · +7.2% | Omnisend faster |
| Listed pricing | Free to install | Free to install | Not directly comparable |
| Years on Shopify | 14 | 12 | Klaviyo +2y |
| Stores observed | 79,328 | 13,031 | Klaviyo leads |
Review corpus
What merchants actually report.
Klaviyo
4.66 avg · 3,114 reviews
Omnisend
4.74 avg · 2,995 reviews
| Signal | Klaviyo | Omnisend | Difference |
|---|---|---|---|
| 5-star share | 89% | 90% | Level |
| Rating · last 90 days | 4.87 | 4.58 | Klaviyo leads |
| Replies to reviews | 50% | 38% | Klaviyo leads |
| Replies to critical (≤3★) | 54% | 86% | Omnisend leads |
| Long-term reviewers (1yr+) | 43% | 29% | Klaviyo leads |
| Top market | United States 46% | United States 45% | — |
| Reviews analyzed | 3,114 | 2,995 | — |
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 Klaviyo if…
- You need follow-up emails
- You need bulk editing
- A larger observed Shopify footprint is reassuring
Choose Omnisend if…
- You need landing pages
- You need translation
- Recent review-growth signals matter to you
Tied to observable requirements only — listed capabilities, ratings, review growth, adoption and price. It doesn’t assert usability or support quality.
Feature differences
What Klaviyo and Omnisend each do that the other doesn’t.
They cover largely the same ground — 95% of listed capabilities overlap. The decision material is the rest: what each lists that the other doesn’t.
Klaviyo only
2
- Follow-up emails
- Bulk editing
Omnisend only
2
- Landing pages
- Translation
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
79,328
stores observed
Skews Shopify · 93%
Omnisend
13,031
stores observed
Skews Shopify · 88%
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 Klaviyo and Omnisend.
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 Oct 1, 2026.
See who’s switching — as it happens.
Track app adoption on live ecommerce stores. Find merchants running Klaviyo or Omnisend, follow stack changes, and see when a store installs, removes, or replaces an app.