Your Klaviyo account shouldn't just claim revenue.It should bank it.

Before we started, Dr Woof was stuck. Email was 20-25% of revenue and had been for a while, across a few different providers, none of which moved the number. When we took over, Klaviyo was driving 26.53% of total revenue with a flow-led setup that wasn't pulling its weight.

Four years later, the brand has grown roughly 9x and is running in the $25-30M annualised range. The owned channel didn't just scale with it, it outpaced it. Abandonment capture grew 64x over the same period, because the real win wasn't loyalty programs or repeat-purchase tricks. It was building out the abandonment flows, browse, cart, checkout, site, so they caught the demand the brand was already paying to acquire, and converted it without paying for that traffic twice.

The product mix changed over the years and the first-time buyer pool grew well beyond the original audience. The flows scaled to capture all of it. Returning customer revenue still grew 581%, retention scaled right alongside the business, but the headline here is capture.

This is what compounding looks like. Year one was finding the leaks. Year two was building the architecture. Year three was scaling alongside the business. Year four is the channel materially outpacing total revenue growth, four years in.

Most agency case studies are 90-day snapshots. This one is four years of continuous, documented work, on an account that's still accelerating.

When we took over Bomber's Klaviyo account, the brand was running solid revenue but their owned-channel layer was underbuilt for their scale. Welcome was running. A few abandonment flows were sending. Campaigns were going out roughly 4 times a month with a clear gap in cadence. Klaviyo was attributing 9.65% of total revenue.

Nine months later, the picture is materially different. Klaviyo's share of total revenue went from 9.65% to 16.90%. An extra 7.25 percentage points of total revenue now coming from the owned channel. That's not "we sent more emails." That's a structural shift in how much work the channel is doing.

The big-picture read: new-customer revenue grew 12.45% YoY. Returning customer revenue was basically flat. The retention system wasn't just driving repeat purchases. It was capturing more of the new-customer demand the brand was already paying to acquire.

There's a line in the performance report we sent to Bomber that captures the mindset: "This is not a static Klaviyo build that slowly fossilizes in the corner." The whole point of Flow CRO is that the account is never finished. Test, learn, ship the winner, kill the loser, start again. Forever.

The control was a wall of text. Strong copy. Fièra's copy generally prints... but plain, all-white, no imagery. We tested a variant with the same copy plus a hero photo of a woman applying the product and a small product family shot. That was the only change.

No new offer. No new copy. No discount. Just one element change inside one email in one flow.

This is what continuous testing looks like at scale. Most agencies do this kind of test once in onboarding and never again. We do it every week, on every flow, until the account compounds itself into something the original brand wouldn't recognize.

A single broken conditional split inside the welcome flow was preventing roughly a third of welcome emails from delivering. The flow was sitting at #7 in revenue ranking. (For context: at most 7-figure brands, welcome should be #1 or #2.)

We fixed the split. The flow moved from #7 to #2. Revenue per day on welcome increased 2.3x. The fix paid for 12 months of retainer in its first 30 days.

This is the kind of leak that's been losing the brand money for months and nobody on their team knows about it. It's also exactly the kind of thing the Revenue Leak Audit is designed to surface.