Most Klaviyo case studies get read the wrong way. Operators skim the headline number, file it away as “impressive,” and move on without asking the question that actually matters: what did this brand build to get there? A 230x ROI figure or a 70% revenue attribution number is not a strategy. It is the output of a specific set of decisions around segmentation, flow architecture, deliverability, and channel consolidation.
We work inside Klaviyo accounts every week as a Klaviyo 1% partner agency, so we read these case studies differently than most people do. We are looking for the mechanism, not the headline. This article pulls apart a set of publicly documented Klaviyo case studies, plus a few from our own client work, to show what separates a well-built program from an account that just happens to have Klaviyo installed.
What you’ll learn in this article
- How Klaviyo differs from Shopify and why the comparison confuses newer operators
- Whether Klaviyo is a stable, growing platform worth building infrastructure on
- What specific brands achieved with Klaviyo, with the actual mechanics behind the metrics
- The recurring patterns across high-performing accounts that you can apply to your own program
What Klaviyo actually is, and how it differs from Shopify
This comes up constantly, so it’s worth settling early: Klaviyo and Shopify are not competitors, and they are not interchangeable. Shopify is the store. It handles the storefront, checkout, payments, inventory, and shipping logic. Klaviyo sits on top of that store as what it calls an autonomous B2C CRM, combining email marketing, SMS, product reviews, a customer data platform, and customer service into one system that reads behavioral data from the store and acts on it.
The relationship between the two companies is closer than most software partnerships. In August 2022, Shopify made a $100 million strategic investment in Klaviyo and named it the recommended email solution for Shopify Plus merchants. Shopify still holds roughly 11% of Klaviyo’s equity. That is not a neutral integration, it is a deliberate bet that retention infrastructure belongs alongside the storefront, not bundled cheaply into it.
Shopify does have a native email tool, Shopify Email, and for a brand doing a few thousand dollars a month in revenue it might be enough. But Shopify Email does not offer the predictive analytics, behavioral automation depth, and dynamic segmentation that Klaviyo built its entire product around. For a brand doing $300K or more a month, that gap shows up fast, usually in the form of generic campaigns and flows that cannot react to real purchase behavior. We’ve covered the mechanics of setting this up properly in our Klaviyo setup guide, so we won’t rehash that here. The short version for this article: Klaviyo is the retention engine, Shopify is the store it runs on top of.
Is Klaviyo a growing company
Platform stability matters more to operators than it gets credit for. If you are building segmentation logic, flow architecture, and years of behavioral data inside a platform, you want to know that platform will still exist, still invest in its product, and still have the capital to build the AI and automation features you’ll need next year.
On that front, the numbers are not ambiguous. Klaviyo was founded in 2012 by Andrew Bialecki and Ed Hallen out of Boston, and went public on the NYSE in September 2023, raising $576 million at a $9.2 billion valuation. That IPO alone tells you the company had reached a scale most martech vendors never approach.
The growth since then has held. In fiscal year 2024, Klaviyo reported revenue of $937 million, up 34% year over year, with its customer base growing 17% to more than 167,000 brands. A year later, fiscal 2025 closed at $1.234 billion in revenue, up 32%, with the customer base expanding past 193,000. Net revenue retention sits at 110%, meaning existing customers are spending more, not just staying put. Perhaps the most telling figure for operators watching where Klaviyo is headed: the number of customers generating over $1 million in annual recurring revenue doubled year over year, and enterprise names like TaylorMade, The Body Shop, Samsonite, Bayer, KIKO Milano, and Nine West signed on or expanded in the past year.
None of that guarantees your account will perform well. But it does mean the klaviyo ecommerce case studies worth studying right now are coming from a platform with the capital and momentum to keep building the AI-driven segmentation and automation tools that the strongest programs are already using.
Revenue share leaders: brands driving a third to two-thirds of ecommerce revenue through Klaviyo
The single clearest signal of a mature retention program is what percentage of total ecommerce revenue it can claim credit for. A handful of Klaviyo’s published case studies put real numbers on this, and the range is instructive.
Svenfish, a food and beverage brand on Shopify, attributed 70% of its year-to-date ecommerce revenue to Klaviyo, with 82% of that Klaviyo revenue coming from campaigns using one or more AI features. They sent 27 targeted campaigns in a single month, built around Segments AI and Subject Line AI, and saw a 163% year-over-year increase in campaign click rate. That is not a brand sending fewer, better emails. It is a brand sending more emails, but each one built around a narrower, more relevant segment.
Home fragrance brand Valentte saw email climb to 54% of total revenue after a 360% increase in email revenue in a single year, built on abandoned cart flows, win-back sequences, and personalized thank-you flows segmented by purchase count rather than a single generic post-purchase email.
Apparel brand P.E Nation attributed 35% of total ecommerce revenue to Klaviyo, running 60 flows built with agency support, including SKU-specific post-purchase sequences and VIP early access triggered once a customer crossed three purchases. And Lifestraw jumped from roughly 3% revenue attribution on ActiveCampaign to 33% after migrating to Klaviyo, a shift we’ll come back to in the migration section below.
What connects all four is not the platform itself, it’s what they built on it: deep segmentation instead of broadcast sends, personalized post-purchase logic tied to actual purchase count or SKU, and campaigns targeted narrowly enough to earn a click instead of a scroll past. Brands chasing a high revenue-share number by sending more generic campaigns rarely get there. The ones that do got specific.
ROI and flow revenue multipliers worth paying attention to
Return on ad spend gets discussed constantly in acquisition. Return on retention spend gets discussed far less, which is strange given how much more extreme the multiples can be.
Luggage brand July reported a 230x return on its Klaviyo investment, with Klaviyo-attributed revenue growing 52% year over year and flow revenue growing 115%. Nearly half of all Klaviyo-attributed revenue, 49%, came from flows rather than campaigns. That ratio matters. It means the automated, behavior-triggered sequences, not the manually scheduled promotions, were doing the heavier lifting.
Luxury apparel brand Tibi posted a 100x-plus ROI after adding SMS and Marketing Analytics to an existing email program, automating RFM (recency, frequency, monetary) segmentation, and building a multi-channel win-back flow that triggers specifically when a customer classified as a “Champion” or “Loyalist” starts slipping toward a lower-value segment. That single change generated twice the revenue of their prior win-back flow, because it fired based on behavioral drift rather than a fixed 90-day calendar trigger.
Drinkware brand Corkcicle consolidated email, SMS, and reviews from three separate platforms into Klaviyo and saw flow revenue grow 93% quarter over quarter in the first full quarter after adding SMS, with 56% of all Klaviyo-attributed revenue coming from flows.
The pattern across all three is consistent enough to treat as a rule: the flows are doing most of the work, not the campaigns. If your Klaviyo account is generating the bulk of its attributed revenue from manual campaign sends rather than automated flows, that is usually a sign your flow architecture has gaps, not that your campaign team is unusually good.
Platform migration wins, and why the transition itself is the risky part
Migrating platforms is where a lot of retention programs quietly lose months of performance, because sender reputation does not transfer. A brand that spent three years building inbox trust on Mailchimp or ActiveCampaign starts from close to zero the day it switches ESPs, regardless of how good its list is.
Lifestraw’s migration is the clean public example. Moving from ActiveCampaign to Klaviyo, the brand went from roughly 3% of ecommerce revenue attributed to email in 2020 to 33% in the first half of 2024, a 69x return on Klaviyo investment for that period. But the case study is explicit that domain warm-up and rebuilding welcome, abandonment, and post-purchase flows from scratch were prerequisites, not afterthoughts, before that growth showed up.
We saw the same dynamic in our own work with Hedonism Wines, a client who migrated from Mailchimp to Klaviyo. Average open rates sat at 11.2% right after the switch, a number that would panic most marketing directors into thinking the new platform was underperforming. After a structured warm-up sequence and disciplined list hygiene, that number climbed to 79.65%. The platform wasn’t the problem in either direction. The warm-up process was the entire story.
This is the part most brands underweight when they plan a migration: budget for the warm-up period, not just the switch itself. Any agency or in-house team promising instant performance gains immediately after an ESP migration is setting an expectation that inbox providers simply won’t honor. We go deeper on exactly how warm-up and list hygiene work in our Klaviyo deliverability guide.
Enterprise consolidation: when the win is efficiency, not just revenue
Not every strong Klaviyo case study is about a revenue multiple. Some of the most useful examples for larger operators are about what happens when a fragmented martech stack gets consolidated into one system.
Dollar Shave Club is the clearest example of this. The grooming brand sent 237 million email and SMS messages in twelve months after consolidating three separate tools, an email platform, a standalone customer data platform, and a pop-up tool, into Klaviyo. The result was a 30%-plus reduction in total cost of ownership and a 60%-plus reduction in campaign setup time. Just as notably, their lifecycle team went from needing four developers to support the stack down to at most one. That is not a marketing win, it’s an operational one, and for a brand at real scale, operational drag is often the more expensive problem.
Marc Fisher Footwear migrated six brands onto Klaviyo and saw a 20% time savings on CRM execution across the portfolio, a meaningful number when you’re running lifecycle programs for multiple brand lines simultaneously rather than one storefront. And intimates brand ThirdLove posted a 15x return on Klaviyo SMS investment in the first half of 2025, alongside more than $200,000 in revenue generated through Klaviyo’s Customer Hub self-service tool, after consolidating email and SMS data to build cross-channel “channel affinity” segmentation.
For a brand running multiple sub-brands, regions, or a genuinely fragmented tool stack, the case for consolidation isn’t only about the top-line lift. It’s about how many fewer people and systems you need to produce the same, or better, output.
What big companies use Klaviyo
Klaviyo’s customer base spans far beyond the DTC startup stereotype it’s sometimes associated with. Enterprise and heritage brands using the platform include TaylorMade, The Body Shop, Samsonite, Reebok, Bayer, KIKO Milano, and Nine West, all of whom signed on or expanded their Klaviyo footprint within the past reporting year. Beyond that enterprise cohort, well-known consumer brands on the platform include Mattel, Glossier, Daily Harvest, Liquid Death, Stanley 1913, Good American, Dollar Shave Club, ThirdLove, Marc Fisher Footwear, Boston Proper, Dagne Dover, Half Magic, and Hint Water.
This isn’t a static list. Klaviyo’s own case study directory documents more than 90 published customer success stories, and the momentum in the upper end of its customer base is accelerating faster than the platform as a whole: customers spending $50,000 or more in annual recurring revenue grew 37% in fiscal 2025, and the number of customers generating over $1 million in ARR doubled year over year. That tells you where the platform’s product investment is heading. Enterprise retention needs, not just small-brand automation, are increasingly shaping Klaviyo’s roadmap.
What the best Klaviyo programs do differently
Pull these case studies apart and the same handful of decisions keep showing up, regardless of vertical, brand size, or platform history.
Flows generate more revenue than campaigns in the strongest accounts. July drew 49% of its Klaviyo revenue from flows, Corkcicle drew 56%. Campaigns matter, but they are not where the compounding value sits. If your flow revenue share looks nothing like this, that’s the first place to audit, not your subject lines.
Segmentation depth is the real differentiator, not tool access. Every brand in this article had access to the same platform features. Svenfish’s 70% revenue attribution came from acting on Segments AI output across 27 monthly campaigns, not from having Segments AI turned on. The tool is available to all 193,000-plus Klaviyo customers. The behavior of using it aggressively and specifically is not.
Multi-channel consolidation compounds rather than just adds. Tibi, Corkcicle, and ThirdLove all saw disproportionate gains after combining email and SMS data inside one platform, because the flows and segments could then react to channel affinity, not just email engagement alone.
Post-purchase personalization needs to be built around SKU or purchase count, not a single template. P.E Nation’s SKU-specific post-purchase flows and Valentte’s purchase-count-segmented thank-you sequences both outperformed a single generic “thanks for your order” flow, which is still the default in a large share of ecommerce accounts.
Win-back timing should follow behavioral signals, not a fixed calendar. Tibi’s RFM-triggered win-back flow, firing when a high-value customer starts drifting toward a lower segment, generated double the revenue of a standard 90-day win-back sequence.
Migration performance depends entirely on warm-up discipline. Lifestraw and Hedonism Wines both prove the same point from different angles: the platform switch is not the risk, the warm-up period is, and it needs a real plan.
Consolidation is a strategic decision, not just a cost-cutting one. Dollar Shave Club didn’t just save money by replacing three tools with one, they cut campaign setup time by more than half and reduced their dependency on developer resources. That frees up a lifecycle team to actually build strategy instead of maintaining infrastructure.
FAQ
What big companies use Klaviyo?
Enterprise and well-known brands running on Klaviyo include TaylorMade, The Body Shop, Samsonite, Reebok, Bayer, KIKO Milano, and Nine West, all recent enterprise wins for the platform. Longer-standing recognizable names on Klaviyo include Mattel, Glossier, Daily Harvest, Liquid Death, Stanley 1913, Good American, Dollar Shave Club, ThirdLove, Marc Fisher Footwear, Boston Proper, Dagne Dover, and Half Magic. Klaviyo’s customer base has grown to more than 193,000 brands globally, and the number of customers generating over $1 million in annual recurring revenue doubled year over year in fiscal 2025, which shows enterprise adoption is accelerating rather than plateauing.
What are some good case study examples?
A few stand out for how clearly they show mechanism rather than just outcome. Svenfish attributed 70% of ecommerce revenue to Klaviyo through AI-driven segmentation across dozens of monthly campaigns. July generated a 230x ROI with nearly half its Klaviyo revenue coming from flows rather than campaigns. Tibi doubled its win-back flow revenue by triggering sequences based on RFM behavioral drift instead of a fixed schedule. Dollar Shave Club cut total cost of ownership by more than 30% by consolidating three separate marketing tools into Klaviyo. And Lifestraw’s migration from ActiveCampaign, paired with disciplined domain warm-up, took email from roughly 3% to 33% of total ecommerce revenue. Each example teaches a different lesson: AI-assisted segmentation, flow-first architecture, behavioral win-back timing, stack consolidation, and migration discipline, respectively.
Is Klaviyo like Shopify?
No, though the two are frequently confused because most Klaviyo merchants run on Shopify. Shopify is the ecommerce platform itself, handling the storefront, checkout, payments, and inventory. Klaviyo is a specialized marketing and customer data platform that sits on top of a store, whether that store runs on Shopify, WooCommerce, or another platform, and handles email, SMS, and customer data. Shopify invested $100 million in Klaviyo in 2022 and named it the recommended email partner for Shopify Plus, which reflects a partnership between complementary tools rather than competing ones. Shopify’s own native email tool, Shopify Email, exists but lacks the predictive analytics, deep segmentation, and behavioral automation depth that Klaviyo was purpose-built to deliver.
Is Klaviyo a growing company?
Yes, by every available financial measure. Klaviyo went public on the NYSE in September 2023 at a $9.2 billion valuation. Fiscal year 2024 revenue reached $937 million, up 34% year over year, and fiscal year 2025 revenue reached $1.234 billion, up 32%, with the customer base expanding from roughly 167,000 to more than 193,000 brands. Net revenue retention sits at 110%, and the number of customers generating over $1 million in annual recurring revenue doubled year over year. The company has issued fiscal 2026 guidance projecting continued growth in the 21 to 22.5% range, suggesting the expansion, while gradually moderating in percentage terms, remains substantial in absolute dollars.
The takeaway
None of the brands in these case studies got their numbers from installing Klaviyo. They got there from segmentation built around actual purchase behavior, flow architecture that carries more weight than campaigns, deliberate consolidation decisions, and migration discipline that most brands skip. The gap between a functional Klaviyo account and a genuinely well-built one rarely shows up in a single email metric. It shows up in repeat purchase rate, in what share of revenue comes from existing customers, and in whether your flows are still doing the same job they were doing a year ago or have actually been tested and rebuilt.
If you want a structured look at where your own account sits against these patterns, contact Retention Side for a program assessment, or join our list for the retention strategies we send out weekly.