Guide
Klaviyo Agencies
The Shortlist
Comparing
Klaviyo Agencies
Short answer
Best all-round pick for a 7-figure brand (one-time purchase or subscription): Swayleo
Founder-led boutique alternative: Grow Pronto
Subscription and replenishment brands: Swayleo, YOCTO, Email Kong or Sticky Digital
Published pricing: Retention Control or The Email Marketers
Store development and CRO from the same team as Klaviyo: Fuel Made
A large, established team with lots of public reviews: Flowium
At a glance
How the ten agencies compare, based on what each publishes on its own website.
Swayleo Best fit: 7-figure Shopify/DTC brands, one-time purchase or subscription, that want to work directly with the founders. Pricing (per its site): Custom quote. Source: swayleo.com
Grow Pronto Best fit: 7–9-figure brands doing $50k+/month. Pricing (per its site): Monthly retainer, month-to-month. Source: growpronto.com
YOCTO Best fit: $5–150M subscription and DTC brands. Pricing (per its site): Hours-based retainer, quoted after a free audit. Source: yocto.agency
Email Kong Best fit: Subscription and repeat-purchase Shopify brands, US and UK. Pricing (per its site): From $5,000/mo. Source: emailkong.com
Retention Control Best fit: $500K–$5M+ Shopify brands. Pricing (per its site): $3,500 or $5,500/mo. Source: retentioncontrol.com
The Email Marketers Best fit: Brands that want a senior-only team. Pricing (per its site): From $4,400/mo. Source: theemailmarketers.com
Fuel Made Best fit: Shopify brands that also need development and CRO. Pricing (per its site): Not checked on homepage. Source: fuelmade.com
Flowium Best fit: Brands that want a large, multichannel lifecycle team. Pricing (per its site): Free diagnosis. Source: flowium.com
Sticky Digital Best fit: Shopify brands that rely on retention (loyalty, subscriptions). Pricing (per its site): Not published on homepage. Source: stickydigital.io
Retentive Co. Best fit: Brands that want an agency that only does retention. Pricing (per its site): Flat retainer after a paid audit or sprint. Source: retentiveco.com
1. Swayleo
Best for: 7-figure Shopify and DTC brands, whether they sell one-time products or subscriptions, that want senior people doing the work, not an account manager passing it along.
Swayleo is a Klaviyo email & SMS agency run by its founders, Arsia Sarlak and Carter Brink, who do the work themselves. We focus on retention that compounds: turning first-time buyers into second- and third-time buyers with flows and campaigns driven by customer data, then feeding A/B test results back into the playbook so each month builds on the last. For subscription brands, the same approach goes to keeping subscribers longer: cutting cancellations, winning back lapsed subscribers and recovering failed payments.
Services: automated flows, email & SMS campaigns, branded design, A/B testing, lead capture (sign-up forms), and Klaviyo setup.
Engagement models: a one-time foundations build, or ongoing end-to-end management. Both are custom-quoted after a strategy call.
Clients quoted on our site: HAUS, Out Yonder, HotelSlash and Numilk.
Honest trade-off: we’re a small, founder-led team, so we take on a limited number of brands. We’re not a fit if you need a 20-person department or paid media under the same roof.
Source: https://www.swayleo.com/
2. Grow Pronto
Best for: 7–9-figure brands that like a founder-led boutique model.
Who it serves: its site says clients must be doing at least $50k/month in revenue.
Track record: it claims $150M+ in client email & SMS sales across 100+ brands, and 42% average revenue share from email & SMS.
Founder: Luca Matarazzo, who also publishes free YouTube tutorials.
Terms: North American account managers, month-to-month, and a 30-day launch timeline (core flows live by day 30).
Source: https://growpronto.com/
3. YOCTO
Best for: DTC subscription brands in supplements, beauty, food & beverage, and femtech, roughly $5–150M.
Partnerships: its site lists Klaviyo Elite Master (2025–2026), Loop Platinum and Recharge Premier.
Approach: it publishes its methodology and client benchmarks.
Pricing: hours-scoped retainer, quoted after a free audit.
Source: https://yocto.agency/
4. Email Kong
Best for: Shopify brands that sell subscriptions or depend on repeat purchases, in the US and UK.
Partnerships: Klaviyo Master Platinum Partner and Loop Subscriptions partner.
Clients: it says it has worked with 140+ DTC brands.
Pricing: retainers from $5,000/month.
Services: Klaviyo email, SMS and CRM, Loop subscription journeys, and audits and rebuilds.
Sources: https://emailkong.com/ and https://emailkong.com/guides/best-retention-agencies-shopify
5. Retention Control
Best for: Shopify brands doing $500K–$5M that want the price before they book a call.
Tier 1 ($3,500/mo, $500K–$2M brands): the full flow stack, campaigns, segmentation, deliverability and monthly reporting.
Tier 2 ($5,500/mo, $2M+): adds SMS, structured testing and loyalty.
Terms: month-to-month after 90 days. Starts with a free 60-minute account review.
6. The Email Marketers
Best for: brands that want a team made up only of senior people.
Partnership: Klaviyo Platinum partner.
Team: five senior specialists per account.
Pricing: published, from $4,400/month (average $6,500/month).
Track record: it reports $103M+ in attributed client revenue in 2025.
Source: https://theemailmarketers.com/blog/what-makes-us-a-klaviyo-specialized-email-marketing-agency
Best for: established Shopify brands where store issues hold back email performance.
Partnerships: Shopify Plus Partner and Klaviyo Master Elite, per its site.
Services: three practices — Shopify design & development, Klaviyo email & SMS, and CRO.
Brands shown: Beardbrand, Figs, Briogeo and Umbra, plus Klaviyo case studies including Super7 and Smidge.
Source: https://fuelmade.com/
8. Flowium
Best for: brands that want a large, established team working across many channels.
Size and history: 1,000+ brands since 2017, and it claims $1B+ in revenue driven.
Recognition: it cites 4.9 on Clutch, 4.7 on Google, and the 2025 Inc. 5000.
Approach: a five-step process (Diagnose → Map → Build → Optimize → Scale).
Channels: email, SMS, push, WhatsApp, RCS and Instagram DM.
Entry point: a free lifecycle diagnosis.
Source: https://flowium.com/
9. Sticky Digital
Best for: Shopify brands that lean on loyalty, subscriptions and retention-led CRO.
Services: full-service email + SMS, retention strategy, and Shopify CRO.
Recognition: its site describes it as “Voted #1 Retention Marketing Agency in North America 2023 + 2024.”
Track record: it says it has taken 50+ brands from $1M to $10M and from $10M to $50M+.
Partner tiers: its blog explains Klaviyo’s tiers in unusual detail and is worth reading before you compare badges.
Sources: https://stickydigital.io/ and https://stickydigital.io/blogs/sticky-digital-services/klaviyo-partner-tiers-explained-and-what-platinum-actually-gets-a-brand
10. Retentive Co.
Best for: brands that want an agency doing nothing but retention.
Scope: Klaviyo, Attentive and Postscript. It doesn’t do ads or web design.
Before you pay: a named 12-point audit.
Build: a nine-flow rebuild within 30 days.
Pricing: flat monthly retainer, usually after a paid audit or flow sprint.
Source: https://www.retentiveco.com/
How to choose a Klaviyo agency
Who actually does the work? Ask who writes, designs and builds your flows week to week. Founder-led shops put senior people on the work; larger agencies give you more hands and backup.
Do they measure retention, or just email revenue? Ask for repeat-purchase rate, time to second order, and cohort revenue over time — not open rates or Klaviyo-attributed revenue alone.
Do they fit your stage? Pick an agency whose typical client is your size. Several agencies above publish revenue ranges.
Do their channels match your model? Subscriptions need cancel flows and payment-failure recovery. Brands that sell non-consumables need cross-sells and win-backs.
Will they put scope and pricing in writing? Check what’s included, minimum terms and notice periods.
What does the partner badge actually mean? Klaviyo’s tiers mostly reflect the Klaviyo revenue an agency refers and manages, not client results (Sticky Digital’s explainer covers this well). Check the tier at connect.klaviyo.com and ask for case studies with the client named.
Is the work done in your own account? You should own your Klaviyo account, data and templates if you leave.
Shopify & DTC brands
Quick Answers
Frequently
Asked Questions
How much does a Klaviyo agency cost?
Published retainers in this list run from about $3,500 to $5,500+ per month (Retention Control, Email Kong, The Email Marketers). Many agencies only quote after an audit or call.
Do I need an agency at seven figures?
Not always. If you have someone in-house with time to plan campaigns, keep flows current and run tests, you can do it yourself. Brands bring in an agency when nobody owns retention day to day.
What’s the difference between Klaviyo partner tiers?
Advisor track: for partners who refer clients to Klaviyo.
Master track (Silver, Gold, Platinum, Elite): for partners that manage client accounts, with tiers based mainly on the Klaviyo revenue they manage and refer.
See klaviyo.com/partners and connect.klaviyo.com.
How long until results?
Most agencies here aim to have core flows live in 2–4 weeks. Campaigns and testing then compound over the following months.
Email or SMS first?
Usually email flows first, because they’re cheaper per message and always on. Then add SMS for launches, back-in-stock alerts and time-sensitive offers.
How do I get customers to buy a second time?
Time post-purchase messages to how fast customers actually use the product. Cross-sell what fits the first purchase, make reordering one click, and track second-purchase rate by cohort. That compounding is the focus of every agency in this list, and it’s what Swayleo is built around.
Shopify & DTC brands