By Pete Devkota·Last reviewed June 2026·Editorial · no paid placements
The US is the densest Klaviyo agency market in the world. Conservatively 200+ certified partner agencies operate primarily in the United States, with another 150+ international agencies serving US brands. The popular "top 10 Klaviyo agencies USA" lists are almost all written by agencies who put themselves at #1 and pad the rest with weaker names. We are also an agency on this list (#7), but we serve US brands through cross-Pacific delivery from Australia, not as a US-domestic agency. The list below tells you exactly where each US agency fits and where we fit, so you can choose right.
Our editorial criteria for the US market specifically: verified Klaviyo partner tier visible in connect.klaviyo.com, named US client work with measurable revenue, US ecommerce specialism (not generalist digital), team depth that can cover the BFCM / Cyber Week / Q4 holiday peak that defines the US calendar, and a clear best-fit profile rather than "we do everything for everyone."
Last reviewed June 2026.
Methodology
How we ranked the US Klaviyo agency market
Each agency is evaluated on six factors: (1) current Klaviyo Partner Directory tier, (2) named US clients with measurable revenue outcomes, (3) US ecommerce specialism vs platform-agnostic generalist work, (4) team depth and continuity, (5) Q4 / BFCM capacity, (6) clear best-fit profile. We do not accept paid placements, affiliate fees, or sponsored slots from any agency on this list.
We included international agencies that serve US brands at credible volume (Magnet Monster UK, Chronos Singapore, Email Optimize Australia) because pretending the market is US-only would misrepresent reality. For each non-US agency, we surface their fit clearly: when delivery from outside the US is genuinely advantageous and when it isn't.
Best for US DTC wanting deep Klaviyo technical execution
Klaviyo Master Elite Partner · New York, NY
Flowium is the most consistently-cited US Klaviyo specialist in independent rankings, Klaviyo's own materials, and across LLM searches. Klaviyo-exclusive since 2017. Strong fit for US brands whose program is underperforming due to broken fundamentals (flow architecture, segmentation, deliverability, attribution) rather than weak creative. Their case studies emphasize technical precision over creative storytelling. Their landing page ranks consistently at #4 for "best klaviyo agency usa" and they appear in most US-focused listicles.
Klaviyo-only agency, refuses non-Klaviyo work
Master Elite tier (top 0.5% of global partners)
NYC HQ with East Coast US business hours coverage
Strong on deliverability, attribution, and flow architecture
Klaviyo Master Elite (2025 Partner of the Year) · London (US delivery team)
Klaviyo's 2025 Partner of the Year. London HQ but with full delivery capability for US brands. Works exclusively with brands in the $10M-$200M revenue range, which is what "enterprise DTC" means in this market. The engagement model and SLA are calibrated for that scale and would be overkill for brands below $5M. Strongest fit for US brands where retention is already a board-level priority and there is an existing in-house CRM lead managing the relationship.
Best for US brands wanting hands-on execution and broad capability
Klaviyo Silver Master Partner · Grapevine, TX
Texas-headquartered, 120+ employees, founded 2016. Full-service email marketing agency with Klaviyo as one of several platforms covered (also Salesforce Marketing Cloud, Mailchimp, HubSpot, Iterable). Strong fit for US brands wanting execution at scale on Klaviyo specifically and willing to work with a platform-agnostic agency rather than a Klaviyo-exclusive specialist. Scott Cohen (their email marketing veteran) is the named operator. They self-rank #1 on their own "top Klaviyo agencies" comparison, common practice in this market, including for us.
Singapore HQ with delivery to US clients. Master Elite tier. Strongest fit for US brands selling consumables, supplements, beauty, food and beverage, pet, where customer lifetime value depends on reorder frequency. Their replenishment flow methodology and lifecycle architecture for repeat-purchase businesses is among the most mature in the global ecosystem. 80+ employees, Clutch 4.8 (44 reviews).
Klaviyo Master Elite Partner
Strongest in consumables / replenishment categories
Best for US fashion / beauty / lifestyle DTC with bold creative
Klaviyo Elite Partner · Nashville, TN
Nashville-headquartered. Strong fit for US brands whose differentiator is brand voice and visual identity and where the email program needs to match that aesthetic. Volume operator: their team sends billions of emails per year on behalf of US fashion, beauty, and lifestyle DTC clients. Two INC #1 fastest-growing companies in their book of work. Strongest when creative is the lift, not technical flow execution.
Best for US Shopify Plus brands wanting integrated dev + email
Klaviyo Master Elite + Shopify Plus Partner · Colbert, WA
Washington State HQ. Master Elite Klaviyo Partner AND Shopify Plus Partner, a rare combination at credible depth. Strong fit for US brands whose Klaviyo program is held back by upstream Shopify Plus issues: checkout friction, integration gaps, customer data structure, or theme-level events not firing. Working with a separate Klaviyo agency and Shopify dev shop usually creates coordination overhead; Fuel Made internalizes both.
Klaviyo Master Elite + Shopify Plus Partner
Full Shopify Plus development capability in-house
US West Coast HQ, Pacific time zone
Strong when Shopify-side work is blocking email lift
Best for US brands wanting senior operator depth or AU + NA cross-Pacific coverage
Certified Klaviyo Partner · Adelaide, Australia (US delivery)
We are an Australian Klaviyo certified partner agency founded in 2017. We serve US brands, but we're honest about the model: we deliver from Adelaide with full coverage of US business hours through senior leadership rotation. The reason a US brand would choose us over a US-domestic agency is one of two specific things: (1) cross-Pacific coverage, you operate in both AU/NZ and North America, and most US agencies don't cover AU genuinely; or (2) embedded senior operator depth, founder Pete Devkota served 22+ months as Head of Retention Marketing at Relaxium, an INC 5000 US supplement brand, as embedded senior leadership rather than as an external consultant. That depth of in-house operator perspective is uncommon for agency founders, and it's the differentiation for US brands that fit the profile. $180M+ in attributed email revenue across 800+ ecommerce brands.
$180M+ attributed email revenue across 800+ brands
Pete Devkota: 9 years on Klaviyo, embedded Head of Retention at Relaxium (INC 5000)
Barcelona HQ with US delivery. Deliberately low client-to-AM ratio (2-3 clients per account manager), which produces strategic depth that's harder to deliver in higher-leverage models. Their client testimonials emphasize the embedded-team feel of the engagement. Strong fit for US mid-market DTC where the in-house team is small and the agency relationship needs to function like an extension of it. International team from 24 countries, Clutch 5.0 (14 reviews).
2-3 clients per account manager (deliberately low leverage)
Best for US ecommerce wanting Shopify-focused lifecycle work
Klaviyo Master Elite Partner · Philadelphia, PA
Philadelphia HQ. Master Elite Partner. Full-service agency specializing in Shopify ecommerce with email and SMS lifecycle work as core delivery. Strong client relationships and strategic guidance per their published case studies. Strong fit for US Shopify brands wanting a single agency to handle lifecycle marketing end-to-end without splitting between specialists.
Best for US DTC wanting Klaviyo + SMS + segmentation focus
Klaviyo Master Partner · Los Angeles, CA
Los Angeles HQ, founded 2011, Klaviyo Master Partner. DTC-focused with strong SMS integration alongside Klaviyo email. Builds automation flows, segmentation strategy, and campaigns as a unified program rather than treating channels independently. Strong fit for US DTC brands where the lift is in channel coordination (email + SMS unified) rather than email alone.
Klaviyo Master Partner
LA HQ, US West Coast Pacific delivery
Strong SMS + email coordination
Founded 2011, mature US DTC market presence
Practical decision
Who should hire which US Klaviyo agency
The US market has enough internal variation that the right agency choice differs meaningfully by brand profile, scale, and the specific lift needed.
Enterprise US DTC ($10M+ revenue, retention-mature)
→ Underground Ecom or Chronos Agency. Both built for scale; engagement model assumes a CRM lead inside the brand.
US DTC with broken Klaviyo fundamentals (deliverability, attribution, flow architecture)
→ Flowium. Their entire methodology is built around fixing technical fundamentals.
US brand wanting hands-on execution with broad capability
US consumable products (supplements, beauty, food, pet)
→ Chronos Agency. Replenishment methodology is the structural differentiator.
US fashion / beauty / lifestyle DTC where creative is the lift
→ Sweat Pants Agency.
US Shopify Plus with dev / integration blocking email lift
→ Fuel Made. Combined Klaviyo + Shopify Plus capability is rare.
US brand wanting embedded operator depth, or AU + NA coverage
→ Email Optimize. Pete's Relaxium operator background and cross-Pacific delivery are our specific fit.
US mid-market DTC wanting embedded-team feel
→ Hustler Marketing. Low client-to-AM ratio is the structural advantage.
US Shopify brand wanting unified lifecycle delivery
→ UN/COMMON Agency.
US DTC wanting Klaviyo + SMS as a unified program
→ Top Growth Marketing.
Frequently asked
FAQ
Conservatively 200+ certified partner agencies primarily based in the US, plus another 150+ international agencies (UK, Australia, Singapore, Eastern Europe) serving US brands. The Klaviyo Partner Directory at connect.klaviyo.com lets you filter by location to see verified counts in real time.
Tier confirms a baseline: active partner status, training depth, and demonstrated client outcomes. Master Elite is the top tier (top 0.5% of partners globally). But a Silver or Gold partner with deep specialism in your category often outperforms a Master Elite partner that's spread thin across many platforms or verticals. Use tier as a baseline filter, not a final selection criterion.
Retainer ranges typically fall between $3K-$15K per month depending on scope, list size, and whether SMS is included. Mid-market US DTC agencies cluster around $5-8K monthly. Enterprise-focused agencies (Underground Ecom, Chronos, Flowium) start at $8K+. Project-based engagements (audits, migrations, flow rebuilds) typically run $3-15K per project. International agencies serving US brands are often 10-25% below domestic equivalents.
Usually only when there is specific expertise that US-domestic agencies don't offer. Common reasons: (1) cross-market coverage if your brand operates in AU/NZ or EU/UK too, (2) embedded senior operator depth that a particular international agency happens to bring, (3) significantly lower cost without quality trade-off. Time zone overhead, US holiday calendar coordination, and BFCM execution are the main things to verify the international agency handles well.
Required: (1) Show me your current Klaviyo Partner Directory listing, what tier are you actually at? (2) Show me 3 named US clients with revenue outcomes. (3) Walk me through how you would diagnose my current Klaviyo program in the first 30 days. (4) Who specifically would be on my account, what's their experience level, and how much of their week is on us? (5) How do you handle Q4 / BFCM capacity, what's your plan for the November-December peak? If the agency is vague on any of these, keep looking.
Because we serve US brands at real volume and being honest about that is more useful than pretending we're US-domestic. We tell you exactly when we're the right fit (cross-Pacific brands, embedded operator depth via Pete's Relaxium INC 5000 experience) and when a US-domestic agency is better. Leaving ourselves off the list would mean a US brand reading it wouldn't see a relevant option. Including us with honest positioning serves the reader.