Shopify app comparison · updated Sep 16, 2026
Brevo PushOwl vs Klaviyo
Compare Brevo PushOwl and Klaviyo for Shopify email marketing using current ratings, review activity, pricing, features, and OngoingAI-observed adoption.
Brevo PushOwl
Brevo PushOwl: Email,Push,SMS
Grow Sales using Brevo PushOwl Email Marketing, Email PopUp, Web Push Notifications, & SMS Marketing
- Rating
- 4.80
- Reviews
- 2,244
- Review growth · 30d
- +216 · +10.7%
- Pricing
- Free plan available
- Years on Shopify
- 9
- Stores observed
- 754
Klaviyo
Klaviyo: Email Marketing & SMS
Build email marketing, SMS, and WhatsApp campaigns powered by AI to grow ecommerce sales.
- Rating
- 4.70
- Reviews
- 3,298
- Review growth · 30d
- +319 · +10.7%
- Pricing
- Free to install
- Years on Shopify
- 14
- Stores observed
- 69,072
Our read
Klaviyo has the stronger observed market footprint in OngoingAI's data — it appears on 91.6× more tracked stores and carries 1.5× the App Store review depth. Ratings and recent review growth are much closer.
- Rating
- Brevo PushOwl leads slightly4.8 vs 4.7
- Review growth
- Nearly even+10.7% vs +10.7%
- Review depth
- Klaviyo1.5× more reviews
- Observed adoption
- Klaviyo91.6× 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 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 | Brevo PushOwl | Klaviyo | Difference |
|---|---|---|---|
| Rating | 4.80 | 4.70 | Brevo PushOwl +0.10 |
| Reviews | 2,244 | 3,298 | Klaviyo 1.5× |
| Review growth · 30d | +216 · +10.7% | +319 · +10.7% | Klaviyo faster |
| Listed pricing | Free plan available | Free to install | Not directly comparable |
| Years on Shopify | 9 | 14 | Klaviyo +5y |
| Stores observed | 754 | 69,072 | Klaviyo leads |
Review corpus
What merchants actually report.
Brevo PushOwl
4.90 avg · 2,055 reviews
Klaviyo
4.66 avg · 3,077 reviews
| Signal | Brevo PushOwl | Klaviyo | Difference |
|---|---|---|---|
| 5-star share | 95% | 89% | Brevo PushOwl leads |
| Rating · last 90 days | 4.77 | 4.88 | Klaviyo leads |
| Replies to reviews | 1% | 49% | Klaviyo leads |
| Replies to critical (≤3★) | 8% | 53% | Klaviyo leads |
| Long-term reviewers (1yr+) | 19% | 43% | Klaviyo leads |
| Top market | United States 30% | United States 47% | — |
| Reviews analyzed | 2,055 | 3,077 | — |
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 Brevo PushOwl if…
- You need surveys
- You need targeting
- A higher App Store rating is a priority
Choose Klaviyo if…
- You need product reviews
- You need bulk editing
- Recent review-growth signals matter to you
- A larger observed Shopify footprint is reassuring
Tied to observable requirements only — listed capabilities, ratings, review growth, adoption and price. It doesn’t assert usability or support quality.
Feature differences
What Brevo PushOwl and Klaviyo 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.
Brevo PushOwl only
2
- Surveys
- Targeting
Klaviyo only
2
- Product reviews
- Bulk editing
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
- Follow-up emails
- Price drop emails
- Back-in-stock emails
- Win-back emails
- Product recommendations
- Drip campaigns
- Subscriptions
- 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.
Brevo PushOwl
754
stores observed
Skews Shopify · 98%
Klaviyo
69,072
stores observed
Skews Shopify · 93%
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 Brevo PushOwl and Klaviyo.
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 Brevo PushOwl or Klaviyo, follow stack changes, and see when a store installs, removes, or replaces an app.