Shopify app comparison · refreshed
Sendlane 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 3,010 live Shopify App Store reviews.
Sendlane
Sendlane: Unified Email & SMS
Sendlane is the unified email, SMS, & forms platform for eCommerce marketing and automation.
- Rating
- 4.50
- Reviews
- 14
- Δ reviews · 45d
- -1
- Δ rating · 45d
- +0.20
- Pricing
- From $600/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 45d
Star distribution
Share of reviews at each star tier — wider 1- and 2-star bands read as a fatter tail of negative experiences.
Sendlane
14 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.
Sendlane only
1
Shared
46
Klaviyo only
22
Capabilities by Shopify category
50 · 72 total
Managing campaigns
Email marketing
Campaign types
Email marketing
Workflow automation
SMS marketing
Sendlane only
1
- Subscription renewals
Shared
46
- Email campaigns
- SMS campaigns
- Newsletters
- Pop-ups
- Discounts
- 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
- Custom campaigns
- Editor tool
- Templates
- Custom code
- Custom fonts
- SMS capture list
- Triggers and rules
- Automations
- Targeting
- Segmentation
- Tagging
- Tracking
- Reporting
- Analytics
- A/B testing
- Bulk messaging
- Scheduled messages
- Conversion metrics
- ROI tracking
- Custom segments
- Cart recovery
- Birthday messages
- Discount codes
- Order confirmations
- Order tracking
- Welcome messages
- Win-back campaigns
Klaviyo only
22
- Push notifications
- Forms
- Promotions
- Subscriptions
- Product reviews
- AI generation
- Localization
- Bulk editing
- Import and export
- Email domains
- Consent collection
- Email capture list
- Geolocation
- Insights and tips
- APIs and webhooks
- Compliance
- Custom sender ID
- Personalized messages
- Two-way messaging
- Real-time analytics
- Opt-in
- Feedback requests
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
Sendlane
100% positive · avg rating 5.00
“Great customer support from Sendlane team. Always quick with responses and help. Thank you Sendlane and Magno, you are the best. -Erik, moonlight”
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
Sendlane
0% positive · avg rating —
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
Sendlane
0% positive · avg rating —
No standout quotes yet — corpus is still warming.
Klaviyo
100% positive · avg rating 4.99
“Intuitive and easy to use for someone that is new to e-commerce.”
onboarding
Sendlane
0% positive · avg rating —
No standout quotes yet — corpus is still warming.
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
Sendlane
0% positive · avg rating —
No standout quotes yet — corpus is still warming.
Klaviyo
100% positive · avg rating 4.80
No standout quotes yet — corpus is still warming.
performance
Sendlane
0% positive · avg rating —
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.
Sendlane
Klaviyo
- customer-support223
- pricing131
- ease-of-use49
- onboarding34
- bugs31
- bug26
- performance25
- billing-issues24
Uniquely customer-support · pricing · ease-of-use · onboarding · bugs · bug · performance · billing-issues · missing-features · billing
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 Sendlane or Klaviyo, and the moment they switch.