The ecommerce customer retention platform for Shopify and Klaviyo.
Predict churn before customers leave. Enrich every Shopify customer record with demographic and behavioral context. Route ranked retention audiences into Klaviyo on a recurring schedule. All without leaving the stack your team already runs.
What it does
Three jobs your current retention stack is leaving on the table.
Most ecommerce retention software is either a glorified rule builder bolted onto your ESP, or an analytics dashboard that stops at insight and never converts to action. RetentionLab is built specifically for mid-market Shopify brands that already run Klaviyo and need the layer above it: customer-level intelligence that actually decides who gets the next campaign, and why.
Predict churn before customers leave
A churn model trained on your Shopify orders, Klaviyo engagement, and subscription signals. We do not tell you who already left. We tell you who is quietly drifting, while there is still time to bring them back.
Enrich every customer record
Household, behavioral, and geographic context layered onto every customer in your store. Your ESP can sort by first-time buyer. We help you sort by who they actually are.
Trigger Klaviyo on the right people
The ranked audience pushes into Klaviyo automatically. You approve campaigns through your normal flow. We handle suppression, attribution, and the weekly refresh.
How it works
The integration loop, specifically for Shopify and Klaviyo.
Five steps, mostly automated after the first connection. Mid-market ecommerce brands typically go from signup to first ranked audience in Klaviyo inside a single afternoon.
Connect Shopify
Read-only OAuth, no plugin install. We pull twelve months of orders, customers, products, and discount usage. The connection is verified before any campaign work begins.
Connect Klaviyo
One API key, one click in Klaviyo. We confirm we can read your existing segments and write to a single retention-named segment that we manage.
Enrich and score
Within a few hours we score every customer for churn risk and expected lifetime value, and enrich the records with household and behavioral context derived from public reference data.
Push the ranked audience to Klaviyo
Every Monday morning, the top-priority audience for your retention strategy is refreshed into your Klaviyo segments. Full unsubscribe and suppression handling is automatic.
Approve, send, measure
You approve campaign content through your normal Klaviyo workflow. After send, RetentionLab attributes recovered and incremental revenue against the audiences we pushed, so the line between strategy and outcome is legible.
Outcomes
Where the customer lifetime value (LTV) growth actually shows up.
We report outcomes as ranges because every brand starts in a different place. A Shopify brand with a generous flow library and an under-segmented audience will see different lift than one with a clean baseline and a tighter program. The numbers below reflect what mid-market online retailer retention tools should be measured against once they are live across the audience.
Repeat purchase rate lift
Range observed across mid-market Shopify brands after enriched audiences are fully active in Klaviyo for one full quarter.
Win-back recovery vs. calendar-triggered
Predictive churn-windowed win-backs recover lapsing customers at multiples of the recovery rate of standard day-90-since-purchase flows.
LTV gain on top-decile customers
When discount suppression and brand voice consistency are applied to the top customer decile, the customer lifetime value of that decile typically gains a quarter to a half.
For the full breakdown of which retention tactics move which input in the LTV equation, read How to increase customer lifetime value: 12 tactics that actually work. The outcomes above are what those tactics, executed cleanly, tend to compound into.
Customer retention software comparison
RetentionLab + Klaviyo vs. the alternatives.
How an enriched and ranked retention layer compares against running Klaviyo alone or bolting on a generic retention tool. This is the decision most mid-market retention leaders are actually making.
| Capability | Klaviyo alone | Generic retention tools | RetentionLab + Klaviyo |
|---|---|---|---|
| Per-customer churn prediction | Engagement-based scoring only | Rule-based segments | ML model trained on your orders, ESP engagement, and subscription signals |
| Demographic and household enrichment | Not included | Optional third-party data | First-party data plus public reference, layered onto every customer record |
| Individual LTV forecasting | Aggregate cohort metrics | Aggregate only | Expected lifetime value scored per customer, ranked |
| Klaviyo audience sync | Native segments | Depends on integration | Automatic weekly push with full suppression |
| Setup time | Days | Weeks | Hours, with Shopify + Klaviyo OAuth |
| Where retention strategy lives | Marketer’s head | Inside the tool’s segment builder | Ranked customer list with auto-routing to your existing flows |
Honest disclosure: there are categories where Klaviyo alone is enough. If you have under 5,000 active customers, a single SKU, and a marketer who knows the audience by heart, you may not need an intelligence layer above your ESP yet. RetentionLab earns its place once the audience gets large enough that human pattern recognition stops scaling.
Running email plus SMS, or planning to add a second channel? The multichannel orchestration page covers how cross-channel suppression and per-customer channel routing fit on top of the Klaviyo integration above.
Common questions
Three questions retention leaders ask before they sign up.
Do I have to leave Klaviyo to use RetentionLab?
No. RetentionLab is built to sit on top of Klaviyo, not replace it. We push ranked customer segments into your Klaviyo account on a recurring schedule. You keep approving and sending through your existing flows. The brands that get the most value from us treat Klaviyo as the delivery layer and RetentionLab as the targeting and timing layer above it.
How is this different from Klaviyo's own predictive analytics?
Klaviyo's predictive tools score engagement (open rate, click rate, recency in their own database). That's useful, but it tells you who's engaging with email, not who's drifting from your brand. RetentionLab scores purchase behavior and enriched demographic context against churn risk and expected lifetime value. Two different inputs, two different outputs. Most operators end up running both because the signals complement each other.
What if my ESP is Omnisend, Mailchimp, or Postscript instead of Klaviyo?
Supported. The platform pushes campaign audiences and content to Omnisend, Mailchimp, and Postscript with the same suppression handling and approval workflow. The page above leads with Klaviyo because that's the most common stack for mid-market Shopify brands, but the integration model is identical across ESPs.
Retention strategy for ecommerce brands
Plug into Shopify and Klaviyo. Run your first ranked retention audience the same week.
Mid-market ecommerce brands typically connect Shopify and Klaviyo, complete enrichment, and push the first audience into their existing flows inside a single afternoon. Talk to us about your stack and we will tell you, candidly, whether you are at the right scale yet.