- US device IDs in the graph
- 750M+
- Match rate on events
- 90%+
- Identity window, per customer
- Lifetime
- Most brands are live
- <20 min
How it flows
How a Skio event reaches Klaviyo. Captured on the server, resolved to a person, then sent.
01 Capture
Captured from Skio
Capture Skio subscription events server-side, with the first charge distinguished from every renewal that follows it.
See the Skio integration →
SkioWhat it sends subscription_idthe Skio subscription, stable across chargesemail / phonesubscriber contactcharge_typefirst charge, renewal, swap or skipline_itemsproducts on this chargetotal / intervalcharge amount and billing cadence
02 Understand
Resolved to one person before it leaves
Every Skio event is matched against a 750M+ device graph, so a phone browse and a desktop checkout resolve to one customer rather than two strangers.
How resolution works →
Resolved before it is sent - IdentityMatched against a 750M+ device graph, so a phone browse and a desktop checkout resolve to one customer.
customer_typeNew or returning, resolved before send.- DeduplicationOne order produces one event, so a single purchase cannot trigger the same flow twice.
- Bot and fraud filteringAutomated traffic never becomes a profile, so list quality and deliverability are not paying for it.
03 Activate
Delivered to Klaviyo
Attach re-identified emails to events before they reach Klaviyo, so browse and cart flows fire for people the pixel lost.
See the Klaviyo integration →
KlaviyoWhat it receives email / phonethe profile key: no profile, no sendexternal_idtie a browse to a known person$valueflow and campaign revenue attributionevent propertieswhat the flow branches on
Which events reach Klaviyo
Each Upstack event is mapped to the Klaviyo event below before it is sent.
| Upstack event | Sent to Klaviyo as | Key data on the event |
| Product view | Viewed Product | ProductName, ProductID, Price, ImageURL |
| Add to cart | Added to Cart | ProductName, ProductID, Price, Quantity, CartValue |
| Checkout | Started Checkout | CartValue, ItemCount, CheckoutURL |
| Purchase | Placed Order | OrderID, Revenue, Items, DiscountCodes |
Upstack’s identity resolution attaches the visitor’s email before an event is forwarded, and syncs profile properties ($first_name, $last_name, $city, $region) plus custom identity properties to Klaviyo.
The catch
Flows keyed on order events welcome a subscriber again on every renewal, because nothing downstream distinguishes charge one from charge nine.
Where to check in KlaviyoSending you can audit
Klaviyo › Analytics › Metrics
The event appears as its own metric, and the profile count on it is the number you were losing before.
What changes
What changes when Skio feeds Klaviyo. Two gains on the Klaviyo side, two on the Skio side.
Klaviyo
Recover carts you couldn’t email
Anonymous browsers are resolved to a known profile, so abandonment flows can trigger for visitors Klaviyo never identified.
Klaviyo
Profiles, not sessions
Events arrive attached to a resolved customer, so flow logic and segmentation work on a person.
Skio
Every event, server-side
Storefront and checkout events are captured from Skio on the server, independent of the browser.
Skio
One setup, every destination
Connect Skio once and forward to every ad platform, email tool and warehouse you run.
Setup
Live in under 20 minutes.
You need admin access to a Klaviyo account, with permission to create a Private API key with Full Access.
Upstack dashboardExample
Skio Data source Connected
Klaviyo Destination Healthy
Read the full Klaviyo setup guide → -
01
Connect Skio
Capture Skio subscription events server-side, with the first charge distinguished from every renewal that follows it.
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02
Add the Klaviyo destination
Under Destinations, add Klaviyo with a Private API key named UpstackData, created with Full Access under Settings, Account, API Keys in Klaviyo. The key starts with pk_ and is shown only once.
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03
Check metrics in Klaviyo
Upstack marks the destination Healthy, and Analytics, Metrics in Klaviyo shows Upstack events such as Added to Cart - Upstackified within a few minutes of live traffic. Then contact Upstack support to set up your Upstack abandonment flows.
FAQ
Questions about Skio and Klaviyo.
Which events does Klaviyo receive?
ViewContent as Viewed Product, AddToCart as Added to Cart, InitiateCheckout as Started Checkout and Purchase as Placed Order.
Which customer parameters are sent to Klaviyo?
Upstack’s identity resolution attaches the visitor’s email before an event is forwarded, and syncs profile properties ($first_name, $last_name, $city, $region) plus custom identity properties to Klaviyo.
How do I check that Skio events are reaching Klaviyo?
Upstack marks the destination Healthy, and Analytics, Metrics in Klaviyo shows Upstack events such as Added to Cart - Upstackified within a few minutes of live traffic. Then contact Upstack support to set up your Upstack abandonment flows.
How long does it take to connect Skio to Klaviyo?
Most brands are live in under 20 minutes. Once Skio is connected, every destination receives the same resolved events, Klaviyo included.