Klaviyo: Email Marketing & SMS vs RetentionLab: Reduce Churn
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 8, 2026 for Klaviyo, Oct 13, 2026 for RetentionLab.
The short answer
- Paid plans start at $15/month for Klaviyo and $29.99/month for RetentionLab.
- Klaviyo lists 56 features RetentionLab’s listing doesn’t mention, including A/B testing, Abandoned cart, AI generation.
Head to head
Email, SMS, and more - a unified customer platform
- United States
- United Kingdom
- Australia
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · AI-assisted, on-brand content
- · Built-in dashboard & reporting
- · Guided onboarding setup
- · One place for forms, emails, and flows
- · Seamless migration to full platform
- · Set up directly in Shopify Admin
SMS
- · Automated two-way conversations
- · Branded SMS links
- · Customizable multi-channel attribution
- · Multi-channel A/B testing
- · Multi-channel segmentation and flows
- · SMS AI for campaign creation
- · 160+ campaign templates
- · Email AI for campaign creation
- · Multi-channel A/B testing
- · Multi-channel segmentation and flows
- · Personalized product recommendations
- · Predictive analytics
Starter
- · 14-day free trial
- · Sync up to 2,500 contacts
Launch
- · 7-day free trial
- · Sync up to 10,000 contacts
Grow
- · Sync up to 50,000 contacts
Accelerate
- · Sync up to 100,000 contacts
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureGo beyond the basics with the Klaviyo marketing app. New stores get a guided setup — sign-up form, welcome email, and abandoned-checkout flow — without leaving Shopify Admin. Unify data from 350+ integrations and boost marketing performance with campaigns, smart segmentation, and automated workflows from Klaviyo’s AI Agents.
Klaviyo can send anything. It just can't tell you who to send it to, or when. RetentionLab watches your store and finds the customers about to churn, ready to reorder, or due for a cross-sell. You see them on one dashboard, ranked by the revenue actually at stake, then sync the ones you want into Klaviyo as ready-to-use segments. Your existing flows do the sending. Connect it once and it runs on its own.
- Use data from Shopify and other apps – web activity, tags, catalog, coupon codes
- Create segments and triggers using complete historical and real-time data
- Use omnichannel templates for Welcome, Back in Stock, Abandon, Price Drop & more
- Get real-time revenue data per automation, campaign, segment, and channel
- Trigger personalized lifecycle messaging based on customer behavior
- Sync dynamic customer audiences to Klaviyo, Omnisend, and more
- LTV, churn prediction, behavioral cohorts, attribution & audience insights
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Klaviyo |  RetentionLab |
|---|---|---|
| Detected stores | 274,130 | Not published |
| Net store change, 28 days | +480 | 0 |
| Stores added, 28 days | 2,781 | Not enough data |
| Big-brand share | 15% | Not enough data |
| Top store categories | Apparel & Accessories, Health & Beauty, Home & Garden | Not published |
| Top store countries | United States, United Kingdom, Australia | Not published |
Reviews
| Measure | Klaviyo | RetentionLab |
|---|---|---|
| App Store rating | 4.7 ★ | Not published |
| App Store reviews | 3,434 | Not published |
| New reviews, 28 days | 62 | Not enough data |
| Reviewers a year or more in | 43% | Not enough data |
Pricing
| Measure | Klaviyo | RetentionLab |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $15/month(ahead) | $29.99/month |
| Longest free trial | Not listed | 14 days |
| Plans listed | 3 | 4 |
Listing
| Measure | Klaviyo | RetentionLab |
|---|---|---|
| Shopify category rank | #2 | Not enough data |
| Shopify App Charts | #2 on the Shoplist 100 | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Sep 20, 2012 | Jun 3, 2026 |
| Languages | 6 | 1 |
| Developer | Klaviyo | RetentionLab |
FAQ
Klaviyo and RetentionLab: common questions
- Is Klaviyo or RetentionLab cheaper?
- Paid plans start at $15/month for Klaviyo and $29.99/month for RetentionLab. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- Klaviyo lists 56 the others don’t mention, such as A/B testing, Abandoned cart, AI generation, Analytics. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 8, 2026 for Klaviyo, Oct 13, 2026 for RetentionLab; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 8, 2026 for Klaviyo, Oct 13, 2026 for RetentionLab. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.