Shopify app comparison · refreshed
Omnisend Email Marketing & SMS vs Klaviyo
Two Shopify apps in the email marketing category, compared on the dimensions merchants actually weigh: ratings, review momentum, pricing, customer-support sentiment, bugs, and what reviewers uniquely call out. Built from 5,981 live Shopify App Store reviews.
Omnisend
Omnisend Email Marketing & SMS
Run email marketing & SMS campaigns with AI marketing tools. Collect emails with popups & sell more.
- Rating
- 4.70
- Reviews
- 2,985
- Δ reviews · 48d
- +32
- Δ rating · 48d
- -0.10
- Pricing
- From $16/mo
- Built for Shopify
- No
Klaviyo
Klaviyo: Email Marketing & SMS
AI marketing and customer service automation for email marketing, SMS, and WhatsApp to grow faster.
- Rating
- 4.70
- Reviews
- 2,996
- Δ reviews · 49d
- +204
- Δ rating · 49d
- +0.10
- Pricing
- From $15/mo
- Built for Shopify
- No
Scorecard
The decision, by the numbers.
Each row reads directly from the live App Store listing and the observed review-stats history. No editorialising on top.
Trajectory
Momentum and risk profile.
Review momentum
Reviews gained since first observed snapshot · past 48d
Star distribution
Share of reviews at each star tier — wider 1- and 2-star bands read as a fatter tail of negative experiences.
Omnisend Email Marketing & SMS
2,985 reviews
Klaviyo
2,996 reviews
Feature footprint
How similar are these apps, really?
Every capability tag both apps list on the Shopify App Store, mapped into shared ground and side-specific edges. Same taxonomy on both sides — Shopify’s own.
Omnisend Email Marketing & SMS only
6
Shared
47
Klaviyo only
21
Capabilities by Shopify category
70 · 72 total
Managing campaigns
Email marketing
Campaign types
Email marketing
Managing pop-ups
Pop-ups
Workflow automation
SMS marketing
Pop-up types
Pop-ups
Omnisend Email Marketing & SMS only
6
- Landing pages
- Translation
- Spin the wheel
- Countdown timers
- Custom pop-ups
- Campaigns
Shared
47
- 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
- Targeting
- Geolocation
- Segmentation
- Tagging
- Tracking
- Reporting
- Insights and tips
- Analytics
- A/B testing
- APIs and webhooks
Klaviyo only
21
- Follow-up emails
- Bulk editing
- Bulk messaging
- Compliance
- Custom sender ID
- Personalized messages
- Scheduled messages
- Two-way messaging
- Conversion metrics
- Real-time analytics
- ROI tracking
- Custom segments
- Opt-in
- Cart recovery
- Birthday messages
- Discount codes
- Feedback requests
- Order confirmations
- Order tracking
- Welcome messages
- Win-back campaigns
Side-by-side by axis
What merchants actually say.
Semantic search across the review corpus, bucketed by sentiment, with the strongest positive and negative quotes per side.
customer support
Omnisend Email Marketing & SMS
99% positive · avg rating 4.90
“great support. 1:30am in the morning had some questions and Salma helped me out. can't complain when you have such customer service”
“do try this out and make sure you get Anastasiia for live chat to experience how customer support should NOT be done. Extracts from my live chat with her A: "I have told you that I have already asked them to stop sending" A: "You click on Send now button. What do you expect to happen?" Quite apart from that she was also completely wrong on the tech knowledge too. There was definitely something very buggy about the system and I would have loved to have worked through it with their support but then alas Anastasiia happened. I am sure there are live chats for people who like to be reprimanded by a stranger. However I question whether a mail marketing app would be the right forum. I now took time to read some reviews and interestingly the positive reviews were all posted in batches on more or less the exact same dates and use the same very similar tones whereas the one star reviews are posted on varied dates and consist of varied tones in writing.”
Klaviyo
89% positive · avg rating 4.59
“Best customer service support chat. They are always willling to help!”
“every time you contact the chat it is 8 hours, and they are not fully trained and don't have an answer to any technical issue so you have to close and start a new chat hopping you'll get somebody else! no tel support.”
pricing
Omnisend Email Marketing & SMS
100% positive · avg rating 5.00
No standout quotes yet — corpus is still warming.
Klaviyo
0% positive · avg rating 1.00
“False pricing plan. If you open pricing plan from the app page, then you will see that you can buy 20$ plan with 5000 emails. However, after installation I've tried to update plan, and the cheapest version is for 140$ only!”
ease of use
Omnisend Email Marketing & SMS
99% positive · avg rating 4.94
“easy enough for the average user to work with, easy to understand”
Klaviyo
100% positive · avg rating 4.99
“Intuitive and easy to use for someone that is new to e-commerce.”
onboarding
Omnisend Email Marketing & SMS
50% positive · avg rating 3.00
“I just started using this app. I haven't watched the onboarding or any tutorials yet. Just had to jump into it and get an email out the night before a big summer sale. LOL The support has been fantastic. Day and night. Thank you Andres for your help and sending me the links to the onboarding. I look forward to watching, learning and success!”
“BIG MISTAKE Worst onboarding experience ever. I had to chase them so many times. They have layers for support that is dysfunctional. I was happy with Yotpo but they stopped SMS and they recommended to move these guys. Unfortunately waste of time and loss of potential revenue.”
Klaviyo
33% positive · avg rating 2.67
“A little rocky of a start in the learning process. I think It's a great process but scheduling in time to really understand the interface is important and an investment. Would recommend for serious entrepreneurs”
“When I speak with reps from other apps they rave about Klaviyo, but I'm guessing they have not gone through the onboarding process. We were assigned an onboarding specialist, but they don't help you much with the technical stuff. She's just a project manager, essentially who assigns all the tasks to you. Really great sales pitch, but you feel high and dry after you've signed up. Update: Their documentation is really awful.”
bugs
Omnisend Email Marketing & SMS
100% positive · avg rating 5.00
No standout quotes yet — corpus is still warming.
Klaviyo
100% positive · avg rating 4.80
No standout quotes yet — corpus is still warming.
performance
Omnisend Email Marketing & SMS
100% positive · avg rating 5.00
No standout quotes yet — corpus is still warming.
Klaviyo
100% positive · avg rating 4.94
No standout quotes yet — corpus is still warming.
What each is known for
Themes reviewers raise.
The topics that surface most across reviews — the shared backbone and what each app is uniquely known for.
Omnisend Email Marketing & SMS
- customer-support3
- missing-features1
- pricing1
- bug1
- email-automation1
- bugs1
- reliability1
- account-management1
Uniquely email-automation · reliability · account-management · sms-campaigns
Klaviyo
- customer-support223
- pricing131
- ease-of-use49
- onboarding34
- bugs31
- bug26
- performance25
- billing-issues24
Uniquely ease-of-use · onboarding · performance · billing-issues · billing
Shared themes
Same Shopify categories
Methodology
Where the numbers come from.
Ratings, review counts, pricing, and the “Built for Shopify” flag come from the live Shopify App Store listing — refreshed daily. Trend deltas compare the snapshot from 365 days ago against today. Sentiment counts and quotes are derived from semantic search across the live review corpus, bucketed by rating sign — every quote on this page is a real review, not a paraphrase. Snapshot generated .
Watch the next stack change as it happens.
Ongoing.AI tracks every Shopify brand’s app stack daily. Find the merchants running Omnisend Email Marketing & SMS or Klaviyo, and the moment they switch.