eCommerce marketing automation agencies come in two types. Those that set up your Klaviyo flows, hand you a PDF report, and send a monthly invoice. And those that build the underlying infrastructure that connects your store, your email platform, your ad accounts, and your operations — and makes all of it work together automatically.
The second type is rarer. Here's what it looks like and what it actually produces.
What a proper eCommerce marketing automation agency builds
The foundation is your retention infrastructure — the email and SMS flows that generate revenue from customers you've already acquired. Abandoned cart, post-purchase, win-back, replenishment, browse abandonment. These flows should collectively generate 25–40% of your total revenue. If they're generating less, something is missing or broken.
Beyond the flows, a proper agency builds the data layer underneath them. Shopify order data flowing into Klaviyo with the correct tags and properties. Customer lifetime value calculated and synced daily. VIP segments updated automatically when a customer crosses a spend threshold. Product-specific post-purchase sequences triggered based on exactly what was purchased, not a generic "thank you" series.
Then there's the operational layer — n8n workflows that handle the logic Klaviyo's native Shopify integration doesn't cover. Routing customers into the right sequence based on order history. Syncing subscription data in real time. Firing internal Slack alerts when a high-LTV customer churns so someone can intervene personally.
What we build at ShipWorkflow
We work with eCommerce brands on Shopify at any stage from £30k to £500k+ monthly revenue. Our work covers three areas:
Email infrastructure build. All core flows designed, written, and set up in Klaviyo. Abandoned cart, post-purchase, win-back, replenishment, browse abandonment, welcome series, VIP programme. Segmentation configured. Suppression logic in place so flows don't overlap. UTM tracking on every link for clean attribution in GA4.
Data architecture. Shopify to Klaviyo sync audited and corrected. Customer properties set up correctly so segmentation works. LTV calculation automated. Product catalogue sync enabled for dynamic product blocks in emails. All of this is infrastructure — invisible to the customer but essential for everything else working correctly.
n8n automation layer. Custom logic that Klaviyo can't handle natively. Product-based sequence routing, subscription sync, win-back conversion alerts, daily health reports delivered to the brand owner's inbox showing key email metrics, revenue attribution, and any anomalies.
What the results actually look like
The brands we work with that start with broken or incomplete email infrastructure typically see email revenue as a percentage of total at 8–15%. After a full build:
- Email revenue share moves to 25–35% within 90 days
- Repeat purchase rate improves 10–20 percentage points within six months
- Abandoned cart recovery typically runs at 8–15% of abandoned carts
- Win-back campaigns recover 10–18% of lapsed customers in the first 30 days of being live
For a brand doing £100k/month, moving email from 12% to 30% of revenue is £18,000 in additional monthly revenue from a channel with near-zero marginal cost per sale.
How to evaluate an eCommerce marketing automation agency
Ask to see their Klaviyo account audit process — a good agency identifies exactly what's missing before recommending anything. Ask about their suppression logic — overlapping flows sending contradictory messages is a common failure that tanks deliverability. Ask about attribution — are they measuring actual revenue per recipient and flow revenue, or vanity metrics like open rate?
And ask what they do after the initial build. Flows need ongoing optimisation — subject line testing, send time testing, email copy iteration. An agency that builds and disappears isn't a partner, it's a contractor.
If you want to talk through what your current eCommerce email programme is missing and what we'd build, book a free strategy call.