How U Beauty Grew Klaviyo Revenue by $1.5M YoY and Increased Open Rates 115% Over Four Years

Direct answer: A retention program starting at under 10% of attributed revenue isn't broken — it just hasn't been built yet. U Beauty came to Sticky Digital with email as a secondary channel and a clear goal: find the growth levers that could take the brand to the next level. Over four years, Sticky rebuilt the program from the ground up. The result was $1.5 million in incremental Klaviyo revenue year-over-year, a 115% increase in email open rates, and a 250% increase in flow recipients. AJ P., SVP of Growth at U Beauty, called it simply: "The best agency I've ever worked with."

Where U Beauty Started

U Beauty is a prestige skincare brand built around the SUPER line — clinically tested, ingredient-forward formulas designed to replace multiple steps in a routine. The SUPER Intensive Face Oil, the Resurfacing Compound, the SIREN Capsules. These are considered purchases made by customers who research before they buy and stay loyal when the product works. That loyalty profile is exactly what makes retention marketing valuable — and exactly what was being underutilized.

Less than 10% of attributed revenue coming from email in January 2020 is a specific kind of problem. It's not that the email program wasn't working. It's that it barely existed as a channel. The list was there, the ESP was connected, but the program infrastructure — the flows that run at every high-intent moment, the segmentation logic that makes campaigns relevant, the list growth mechanics that bring new subscribers into the system — wasn't built in a way that could produce meaningful results.

For a brand with U Beauty's product complexity and customer profile, that gap was significant. A customer considering a $185 face oil needs more than a campaign to convert. They need education, social proof, the right framing at the right moment in the consideration window. All of that is retention program architecture. None of it was running at scale when the engagement began.

Four Years of Results

A four-year partnership produces a different kind of evidence than a two-month sprint. The numbers here aren't early-engagement lifts from a program that was previously dormant — they're sustained improvements across a changing business, a changing competitive landscape, and a customer base that evolved over nearly half a decade.

Klaviyo revenue up $1.5 million year-over-year. This is the top-line figure, and the framing matters: it's a year-over-year increase, not a total. The program was generating meaningfully more in year four than it was in year three, which means the growth wasn't front-loaded. The compounding worked. A retention program that produces a big first-year number and then plateaus is a good launch. A retention program that produces a $1.5 million annual increment four years in is a different kind of infrastructure.

Email open rate up 115%. More than doubling the open rate over four years is a list health story as much as a creative story. Subject line quality contributes to open rates. But a 115% increase requires the underlying list to be healthier — better segmented, better maintained, better engaged. Subscribers who consistently open emails are subscribers who have been trained by good sends to expect something worth opening. That training takes time and requires consistently delivering on the implicit promise of every email that earns a click.

Flow recipients up 250%. This metric is about reach within the automation layer — how many customers are actually entering and moving through the program's always-on sequences. A 250% increase means the flow infrastructure was dramatically expanded and the audience entering those flows grew significantly. More welcome series triggers. More post-purchase sequences firing. More winback campaigns reaching lapsed customers. The automation layer is only as valuable as the customers it's actually touching, and a 250% increase in flow recipients means far more customers are now inside a system that converts them.

From Under 10% to a Primary Growth Channel

The most important number in U Beauty's case study isn't in the three stats on the slide. It's the starting point: less than 10% of attributed revenue from email in January 2020.

For context, Sticky Digital's benchmark across the portfolio is that email and SMS should drive 30–50% of total DTC revenue when the program is built correctly. A brand at under 10% isn't failing — they're just leaving 20 to 40 points of revenue attribution on the table every month. At U Beauty's scale, that's not a marginal number.

The question the engagement started with — how do we use email as a growth lever? — is the right question. The answer, built over four years, was a systematic reconstruction of every layer of the program: flows that didn't exist, segmentation that reflected actual customer behavior, a list growth infrastructure that compounded the audience over time, and campaign creative that matched the brand's editorial intelligence with the performance rigor of a retention-focused team.

The $1.5 million annual increment is the revenue answer. The 115% open rate lift is the audience quality answer. The 250% flow recipient increase is the infrastructure answer. Together they tell the full story of what email looks like when it's treated as a primary channel instead of a secondary one.

Why Prestige Skincare Is One of the Highest-Leverage Retention Categories

Not every category has the same ceiling for email-driven revenue. Prestige skincare sits near the top.

The reasons are structural. U Beauty customers make considered, high-value purchases with a real evaluation period before the first transaction. That evaluation period is one of the most valuable windows in the customer lifecycle — and it's almost entirely addressable through retention mechanics: education sequences, social proof emails, ingredient explainers, editorial content that builds trust while it builds desire. The "Smooth Talk" campaign, pulling in media endorsements from Who What Wear and InStyle alongside customer reviews, is exactly this kind of trust-building work rendered as email.

After the first purchase, the replenishment pattern is strong. A customer who found a routine that works — The Duo of RC and SUPER, the Protocol regimen — repurchases on a predictable timeline. Replenishment flows that fire at the right moment, with the right message, convert at rates most DTC categories can't match because the customer has already done the evaluation work. They're not deciding whether to buy. They're deciding when.

Loyalty mechanics compound on top of that. A customer who has been on a SUPER routine for two years is a different customer than a new subscriber — and a retention program that treats them differently, with VIP signals and early access and the kind of communication that reflects their history with the brand, produces longer retention and higher lifetime value than one that sends everyone the same campaign.

U Beauty's program, rebuilt over four years by Sticky, is built on all three of these layers. That's where the $1.5 million increment comes from.

The Creative Intelligence Behind the Numbers

U Beauty's email creative from this period doesn't look like it was produced by an email marketing agency. It looks like it was produced by the brand.

"It's Not Me, It's U (Beauty)" for Valentine's Day — matching relationship status to product pairings. "Securely Monogamous: The Duo" framing product bundles as committed relationships. "The Protocol" featuring Jennifer Meyer, talking about her escape, what she smells like, the perfect balance of green juice and margaritas. These aren't product campaigns. They're brand moments delivered through an email program.

The creative intelligence matters because U Beauty's customer is sophisticated. She reads the email. She notices when the copy is lazy or the framing is generic. A campaign that sounds like a skincare brand's marketing department — clinical, benefit-forward, promotional — gets a different response than one that sounds like a trusted source who happens to be recommending something they believe in.

The 115% open rate improvement reflects the compound effect of four years of emails that were worth opening. Customers who opened U Beauty emails were rewarded with something that justified the click. Over time, that creates an audience expectation — and an audience that comes back.

What "The Best Agency I've Ever Worked With" Actually Means

AJ P.'s quote is the kind of thing a brand says when the relationship has genuinely exceeded what they expected from an agency — not just delivered, but exceeded. SVP of Growth is a role that has seen agency relationships. The comparison set matters.

Four years is the context for that judgment. It means the relationship held up through difficult periods, through platform changes, through shifts in the brand's positioning and product lineup, through the pressure of a competitive prestige skincare market where new entrants are constant. An agency that's "the best you've ever worked with" after four years isn't coasting on early momentum. They're consistently earning the grade.

What sustains that over time is the thing Sticky aims for on every account: being a growth partner, not a vendor. A vendor executes the brief. A growth partner helps write it — bringing ideas to calls, flagging when something isn't working before the client sees it in the numbers, and building a program that gets smarter about the brand's customers every month instead of running on the same assumptions it started with.

U Beauty's results are four years of evidence that the partnership was that kind of relationship. The $1.5 million annual increment is the proof.

Frequently Asked Questions

How did U Beauty's email revenue grow from under 10% attribution to a primary channel?

Through systematic reconstruction of every layer of the program over four years. Flow infrastructure that didn't exist was built from scratch — welcome series, post-purchase sequences, education flows, winback campaigns. List growth mechanics brought new subscribers into the system consistently. Segmentation logic was built to reflect how U Beauty's customers actually behave rather than sending campaigns to undifferentiated lists. Each layer compounded on the others, which is why the year-over-year revenue increment was still growing in year four.

Why does prestige skincare perform so well as a retention category?

Three reasons. First, the consideration period before a first purchase is long and addressable through email — education, social proof, and editorial content all convert high-intent subscribers during this window. Second, replenishment timing is predictable for customers who find a routine that works, making post-purchase flows unusually effective. Third, the customers who invest in a prestige routine tend to stay loyal once they've committed, which gives retention programs a longer tail to work with than impulse-purchase categories.

What drove the 250% increase in flow recipients?

Two things working together: more flow sequences being built and triggered, and a larger subscriber base entering those sequences. When the engagement started, U Beauty's flow infrastructure was minimal. Rebuilding it meant creating flows for lifecycle stages that had no coverage — and as the list grew through improved acquisition mechanics, more customers entered flows that now existed to receive them. The 250% figure reflects both the infrastructure investment and the list growth it was built to serve.

How long does it take to see meaningful email attribution growth from under 10%?

The early gains are typically faster than the later ones. An account at under 10% attribution often has obvious gaps — welcome series with only one or two emails, no post-purchase flow, no segmentation on campaigns — where fixing the most basic things produces measurable results quickly. Sustained growth from there requires consistent investment in the layers underneath: list health, flow architecture, segmentation sophistication. U Beauty's four-year trajectory shows what consistent investment produces over time.