How to Choose the Best Klaviyo Email Marketing Agency

Last updated: July 18, 2026 · Written by Melanie Balke, Founder & CEO, The Email Marketers

The best Klaviyo email marketing agency for most 8-figure ecommerce brands is one that staffs your account with senior specialists rather than juniors, shows you verifiable results inside real Klaviyo dashboards, gives you a clear 90-day roadmap before you sign, and prices transparently. Ten agencies meet most of that bar in 2026. This guide compares all ten, including us, The Email Marketers. We explain exactly how to check our claims and everyone else's, and we cover the one trap almost nobody warns you about: manipulated attribution settings.

Key Takeaways

• A Klaviyo email marketing agency plans, builds, and manages email and SMS revenue programs inside the Klaviyo platform for ecommerce brands. A retention marketing agency goes further and owns your whole repeat-purchase economics.
• Top-tier Klaviyo partner status is a useful signal, not proof. Tiers are earned largely by referring business to Klaviyo and managing many accounts. It tells you an agency is established. It does not tell you they will be good for you.
• Expect to pay $1,500 to $18,000+ per month. Production shops start near $1,500/mo. Specialist retention agencies run roughly $4,000 to $10,000/mo. The Email Marketers starts at $4,400/mo, averages $6,500/mo, and runs up to $18,000/mo at full scope.
• Check attribution settings before you believe any revenue number. A 14-day window that counts email opens will credit email for sales it barely influenced. More on this below, because it is the most common way brands get misled.
• Full disclosure: The Email Marketers wrote this guide and appears at #1. Our selection criteria and verification steps are published below so you can check our work, and everyone else's.

How Do You Actually Determine Who the "Best" Klaviyo Agency Is?

"Best" is meaningless without criteria. Every agency ranking you will find for this keyword (we checked all eight pages ranking on Google as of July 2026) was written by an agency, and six of the eight place themselves at #1 without saying so.

We are not going to pretend to be neutral. We are on this list. What we can do is show our work, which no other ranking does. Here is how a rational buyer should evaluate a Klaviyo agency:

1. Verifiable results, not claims. An agency should show attributed revenue inside actual Klaviyo dashboards, with attribution settings visible. Not vague "we generated $100M" banners with no evidence attached.
2. Who actually works your account. Many agencies sell you a senior strategist on the sales call and deliver junior or offshore execution. Ask who touches your account weekly, and meet that person before you sign. Not just because of skill: maybe they are brilliant and you simply do not like them. You will work with this person every week. That matters.
3. A real process they can explain. Onboarding, first campaigns, first flows, first report. If they cannot walk you through their first 60 days unprompted, they do not have a process.
4. Pricing transparency. Agencies that hide pricing until the third call are optimizing for negotiation, not fit.
5. Client concentration and fit. An agency whose case studies are all supplement brands may underperform on your fashion brand. Wheelhouse matters more than logo walls.
6. Contract terms you understand. Terms vary for good reasons: some agencies work month-to-month, others ask for six or twelve months because retention work compounds and takes time to pay off. Neither is automatically a red flag. What matters is that they can explain what the term buys you, what happens if it is not working, and what the off-ramp looks like.
7. Proof that is hard to fake. Clutch and Google reviews are great when they exist. Video testimonials are even harder to fake than written ones. And if you want certainty, ask to be connected with a current or former client as a reference. It is a bit of a pain for everyone, but a confident agency will find you one.

What Is a Klaviyo Email Marketing Agency? And What Is a Retention Marketing Agency?

A Klaviyo email marketing agency is a service firm that builds and manages revenue-generating email and SMS programs inside Klaviyo, the marketing automation platform used by more than 167,000 ecommerce businesses. The core work covers four things: strategy (segmentation, calendar, offer architecture), lifecycle automations (welcome, abandoned cart, post-purchase, winback flows), campaigns (design, copy, sends), and deliverability (inbox placement, list hygiene, spam-rate management).

A retention marketing agency is a bigger mandate. It does not stop at content calendars, campaigns, and flows. It owns the strategic question behind all of them: how do we increase your profit and your customer lifetime value? How do we bring customers back more frequently, get them to spend more, and keep them doing it for longer? That mandate pulls in channels beyond email and SMS: direct mail, subscriptions, memberships, referral and loyalty programs. Some agencies on this list are Klaviyo email agencies. The Email Marketers is a retention marketing agency that runs on Klaviyo. The distinction matters when you decide what you are actually hiring for.

How Do Agencies Become "Top Klaviyo Partners" in the First Place?

Klaviyo certifies agencies through its partner program, with designations like Master Elite, Platinum, Gold, and Silver. Here is what most rankings will not tell you: the fastest way to climb those tiers is to refer Klaviyo a lot of business and manage a lot of accounts. Tier reflects an agency's commercial relationship with Klaviyo and the volume it manages. It is a genuinely useful signal that an agency is established and certified. It is not evidence they will be good for your brand specifically. Treat it as one input, verify it at connect.klaviyo.com (self-reported badges lag reality), and weigh the other six criteria above at least as heavily.

Best Klaviyo Email Marketing Agencies

Here are the ten best Klaviyo email marketing agencies in 2026, compared on the criteria above.

Agency	Best for	Klaviyo tier*	Starting price	Team model	HQ
1. The Email Marketers	8-figure DTC brands that want senior-only retention management	Platinum	$4,400/mo (avg $6,500)	5 senior specialists per account, US-led	Los Angeles, CA
2. Flowium	Growth-stage brands that want a systematized, well-documented engagement	Master Elite	~$2,500/mo	~6-person pods, distributed	New York, NY
3. Underground Ecom	Fast-growing brands that want systematized delivery at strong value; 8 to 10-figure, UK/EU	Master Elite	Unpublished	100+ staff, layered account teams	London, UK
4. Fuel Made	Shopify Plus brands that want site development, CRO, and email from one team	Master Elite	$5,000+ projects	~17 all-senior, all-US	Washington State
5. Chronos Agency	Brands scaling fast that want email + SMS + push	Master Elite	~$4,000-5,000/mo	~80-person team, APAC delivery	Singapore
6. Magnet Monster	Brands that want one flat fee across email, SMS, WhatsApp, direct mail	Master Elite	Flat monthly fee	Founder-led, UK-based	United Kingdom
7. Homestead Studio	Brands that want acquisition and retention under one roof	Master Elite	$5,000+ projects	Full-funnel team, $200-300/hr	Wisconsin
8. Andzen	APAC and European brands; journey-mapping methodology	Master Elite	Unpublished	~10-20 core, Brisbane + satellites	Brisbane, AU
9. Sticky Digital	Beauty, wellness, and F&B brands that want a female-founded boutique	Platinum	~$1,000+ engagements	~9-person, 100% female team	California
10. InboxArmy	Budget-conscious brands or teams on multiple ESPs	Silver Master	~$1,500/mo	120+ production team, 40+ ESPs	Grapevine, TX

*Tiers as stated in Klaviyo's partner directory and agency disclosures, July 2026. Verify current tiers at connect.klaviyo.com.

1. The Email Marketers: Best for 8-Figure DTC Brands That Want Senior-Only Retention Management

Bottom line: The Email Marketers is a Los Angeles-based retention marketing agency that manages email, SMS, direct mail, subscriptions, and referral and loyalty programs for 8-figure ecommerce brands, and staffs every account exclusively with senior specialists.

The Email Marketers generated more than $103 million in attributed client revenue in 2025. The team only hires people who have done this before: there is no junior person learning on your account, ever. Brands like Grüns, Gimme Seaweed, Eleven Outdoors (the brand behind K2 Skis and Völkl), Open Store, and Outer Furniture have worked with the agency, so the team knows what working with the best in ecommerce looks like.

Most agencies on this list manage email and SMS. The Email Marketers runs your entire retention program and keeps asking one question: how do we grow your profit and customer lifetime value? That shows up in the deliverables. Every client gets a monthly email revenue forecast, a retention strategy with a rolling 90-day roadmap, board-ready reports that show exactly what was done, what was learned, and what happens next, and a proprietary performance dashboard. The team is proactive to the point that clients notice it: you do not chase your agency, your agency chases you. As the team at BodyBio put it: "They are so on top of it that it's an adjustment in a good way. Very happy."

Verified results (all case studies public on our site):

• The Freeze Pipe grew attributed email revenue 113% to $894,661 in five months. Total revenue doubled year over year to $3.49M. (Full case study)
• Llama Naturals grew monthly email revenue from $8,527 to $79,733, an 835% increase, in under 60 days.
• Gimme Seaweed lifted flow revenue share from 46.6% to 67.3% of email revenue, with open rates climbing from 47.9% to 62.7%. (Full case study)
• V-Flat World increased first-time customer revenue 108% and email AOV 24% in one quarter. (Full case study)

What clients say: "We have seen a dramatic increase in revenue and other key performance metrics since partnering with them. Their understanding of Klaviyo email marketing is icing on the cake," says Leah Russell of Adelante, a client of more than a year. Brad Baum, CEO of Llama Naturals: "They executed flawlessly from tone to design… we're already seeing a huge ROI." Video testimonials from The Freeze Pipe, V-Flat World, Foria, and NuBrakes founders are on the site as well, and video is much harder to fake than text.

Pricing: Starts at $4,400/month, averages $6,500/month, and runs up to $18,000/month at full scope. That is premium pricing, on purpose: it is what an all-senior, US-led, five-specialist team costs. The trade-off between a cheaper agency and a premium one is covered honestly in the pricing section below.

Retention Lab, for brands that are not ready for the full agency: The Email Marketers also runs a done-with-you coaching program for two kinds of brands. First, larger brands that want to build an in-house retention team and want senior operators teaching that team the playbooks. Second, smaller brands with someone smart internally who wants to learn how to do this properly but cannot yet justify a full agency retainer. Weekly strategy sessions, playbooks, and templates instead of a done-for-you team.

Honest fit-notes: The Email Marketers does not run paid acquisition; it is retention-only by design. It is premium-priced, and founder Melanie Balke states publicly that she turns down business the team cannot wow. Brands under seven figures should look at the Retention Lab, Sticky Digital, or InboxArmy instead.

2. Flowium: Best for Growth-Stage Brands That Want a Systematized, Well-Documented Engagement

Bottom line: Flowium is a Klaviyo Master Elite agency founded in 2017 by Andriy Boychuk that delivers email and SMS through standardized account pods and tightly templatized processes.

Flowium's strength is exactly that systemization. Audits, flow builds, and campaign calendars follow strict, repeatable processes, backed by one of the largest educational content libraries in the space. Clutch shows 23 reviews with a strong record, minimum projects from $1,000, and typical retainers reported between $2,500 and $10,000 per month. Roughly 80% of its clients are midmarket.

Fit-notes: Email and SMS only; no paid media, CRO, or development. Brands that want a highly systematized, well-documented engagement will be happy. Brands that want a more hands-on, bespoke, individually tailored strategy will likely find the templatized process constraining. Its team is globally distributed, and a minority of reviews mention timezone friction.

3. Underground Ecom: Best for Fast-Growing Brands That Want Systematized Delivery at Strong Value

Bottom line: Underground Ecom is a London-based retention agency of 100+ people, Klaviyo's 2025 Agency Partner of the Year, with enterprise DTC clients including AG1, Huda Beauty, and Oh Polly.

Think of it as the Flowium model at enterprise scale: well systematized, fast-growing, and strong bang for your buck given the size of team you get. Accounts get layered support: CRM director, CRM manager, designers, copywriters, plus a senior strategy layer. For enterprise muscle in the UK and Europe, nobody on this list matches it.

Fit-notes: No public pricing. The layered structure delivers consistency, but brands that want more hands-on, individual attention from one senior person week to week may find the layers add distance. Its Clutch footprint is thin relative to its size, so ask for referenceable clients.

4. Fuel Made: Best for Shopify Plus Brands That Want Development, CRO, and Email From One Team

Bottom line: Fuel Made is a ~17-person, all-senior, all-US agency that has been Shopify-exclusive since 2010 and pairs Klaviyo Master Elite email work with Shopify Plus design, development, and CRO.

No other agency on this list combines top-tier credentials on both platforms. If your retention problems are tangled up with site problems (slow product pages, leaky checkout, poor signup capture), one team can fix both sides. Clutch lists $5,000 minimums at $150-199/hour.

Fit-notes: There is a clear trade-off to weigh here. One team running both your Shopify site and your email is convenient, and the classic risk of that convenience is jack of all trades, master of none. We cannot say whether that applies to Fuel Made specifically, and their credentials on both sides are real, so check the depth of each practice for yourself: ask for email-specific case studies, not just combined ones. Also Shopify-only, small capacity, premium rates.

5. Chronos Agency: Best for Fast-Scaling Brands That Want Email, SMS, and Push

Bottom line: Chronos Agency is a Singapore-headquartered Klaviyo Master Elite agency of roughly 80 people, founded in 2017, claiming 500+ brands served and $400M+ in email-attributed revenue.

Chronos adds push notifications, a channel most email agencies skip, and has one of the larger review bases in the category (58 Clutch reviews). Starter retainers are reported around $4,000-5,000/month.

Fit-notes: Delivery is largely offshore (Philippines/Malaysia), which keeps pricing efficient but means APAC timezones and a volume-oriented model. US brands that want senior US-based strategists in their weekly meetings should weigh that.

6. Magnet Monster: Best for Brands That Want One Flat Fee Across Every Retention Channel

Bottom line: Magnet Monster is a UK-based Klaviyo Master Elite agency founded in 2018 by Adam Kitchen that charges one flat monthly fee covering email, SMS, WhatsApp, and direct mail.

The flat-fee, all-channel model is unique on this list, and Kitchen's public teaching on LinkedIn and podcasts gives unusual visibility into how the agency thinks. Clients include Waterdrop and Bodybuilding.com.

Fit-notes: Flat-fee "unlimited" models usually imply a defined delivery cadence rather than unbounded bespoke work, so ask precisely what the cadence is. The team is UK-centered, which US brands should factor into meeting rhythms.

7. Homestead Studio: Best for Brands That Want Acquisition and Retention Under One Roof

Bottom line: Homestead Studio is a Wisconsin-based full-funnel agency, Klaviyo's 2025 Americas Agency Partner of the Year, that splits its work roughly evenly across email, SMS, paid media, CRO, and web design.

If you want one agency accountable for both customer acquisition and retention economics, Homestead is the strongest option here. Clutch lists $5,000 minimums at $200-300/hour, the highest hourly band on this list.

Fit-notes: Email is only about 20% of what Homestead does, so pure email depth trails the specialists above. The agency was acquired by Verndale, a digital experience company, and acquisitions often bring integration and repositioning churn, so ask how the email practice is staffed today.

8. Andzen: Best for APAC and European Brands That Want Journey-First Strategy

Bottom line: Andzen is a Brisbane-based lifecycle agency founded in 2012, the first Klaviyo Master Elite partner outside the US, that builds retention programs around full customer-journey mapping.

Andzen has the longest track record of any Klaviyo specialist on this list and satellite staff across Berlin, Málaga, Toronto, and Manila. Its journey-mapping methodology is genuinely different from calendar-and-flows agencies.

Fit-notes: No public pricing, and the core team works Australian hours. Fine for APAC and European brands, a real constraint for US-only teams.

9. Sticky Digital: Best for Beauty, Wellness, and F&B Brands That Want a Female-Founded Boutique

Bottom line: Sticky Digital is a ~9-person, female-founded, 100% female-team California agency doing retention only: Klaviyo email plus Attentive SMS for DTC brands with predominantly female customer bases.

The vertical focus is the point: beauty, wellness, food and beverage, apparel. Sticky claims client programs reaching 35-50% of revenue from email and SMS, and engagements reportedly start near $1,000, the most accessible specialist entry point on this list.

Fit-notes: Nine people means limited capacity and possible waitlists. Brands outside its verticals lose the pattern-matching advantage that makes Sticky effective.

10. InboxArmy: Best for Budget-Conscious Brands or Teams Running Multiple ESPs

Bottom line: InboxArmy is a Texas-based, 120+ person email production agency supporting 40+ platforms including Klaviyo, with managed services from roughly $1,500/month and a 4.9 rating across 71 Clutch reviews.

For template production, campaign execution at volume, or brands mid-migration between ESPs, InboxArmy's price-to-output ratio is unmatched here (audits from $500, templates from $950).

Fit-notes: InboxArmy is not a Klaviyo specialist: Klaviyo is one of 40+ supported platforms, and its Klaviyo tier (Silver Master) is the lowest on this list. You are buying production capacity, not DTC retention strategy. Both are valid purchases; know which one you need.

How Much Does a Klaviyo Email Marketing Agency Cost?

A Klaviyo email marketing agency costs between $1,500 and $18,000+ per month in 2026, depending on the delivery model:

• Production shops (InboxArmy): from ~$1,500/month, or à la carte (audits from $500, templates from $950).
• Boutique specialists (Sticky Digital): engagements from ~$1,000, scaling with scope.
• Full-service retention agencies (Flowium, Chronos): typically $2,500-10,000/month retainers.
• Premium specialist and full-funnel teams (The Email Marketers, Fuel Made, Homestead): The Email Marketers starts at $4,400/month, averages $6,500/month, and runs to $18,000/month at full scope. Fuel Made and Homestead carry $5,000+ minimums at $150-300/hour.
• Enterprise (Underground Ecom): unpublished, effectively five figures monthly.

What Is the Trade-Off Between a Cheap Agency and a Premium One?

The honest version: with a cheaper agency you are usually paying for a process, and with a premium agency you are paying for the people running it. Lower-priced models keep their economics by using templated deliverables, junior or offshore execution, and higher client loads per strategist. That can be exactly right if your program just needs consistent, competent execution. A premium agency puts senior operators on your account, carries fewer clients per strategist, and does strategic work (forecasting, roadmapping, testing programs) that compounds. The failure mode to avoid is the worst of both: a wrong-fit agency that charges premium prices for a junior team, has weak processes, and is overwhelmed by its client load. That combination produces a terrible experience at any price, and it is why the vetting section below matters more than any pricing table.

One structural note: even a premium retainer costs less than building the equivalent team in-house. A $6,500/month engagement is a fraction of what a senior strategist, copywriter, designer, and Klaviyo implementation specialist would cost you as employees.

How Long Until an Agency Shows Results?

Expect first revenue impact within 2 to 4 weeks and sustained improvement in 60 to 90 days. Quick wins come from fixing broken flows, deliverability problems, and dormant segments, which is why they arrive fast. Structural gains compound over the first quarter.

Every agency worth hiring should walk you through their version of a roadmap like this unprompted. Ours is a three-phase approach:

Weeks 1-2: Onboarding. This is the phase everyone wants to skip, and it is the foundation of everything. We need to understand your brand and your customers better than you do, and know exactly where your competitors come in and how to win against them. So the first two weeks are a deep audit of your brand, your customers, the competitive landscape, and your entire retention program. Our copywriters read hundreds of your customer testimonials to learn the exact pain points and the exact language buyers use. One brand came to us convinced customers bought for the acidity level and the production standards of their origin country. The testimonial audit showed customers actually bought for the "smooth, buttery flavor," in those words, and that they hated the caps. We sent that one back to manufacturing. That is the level of understanding a real onboarding produces. From there we build the strategy: your 90-day roadmap, your revenue forecast, your automated flow funnel, and your content calendar. And before the phase ends, your first quick-win campaigns go live in week two, so ROI starts early.

Weeks 3-4: First flows live. We implement your first rebuilt flows, optimize your pop-up, and make sure deliverability is on the right track.

Weeks 5-8: Scale what works. You get your first report. You know what is working, what we are scaling, and what we are adapting based on the first learnings. From there we light things on fire. Later on we also bring in partners so you can grow across every channel of retention.

To make that concrete: Llama Naturals went from about $8,500 to almost $80,000 in monthly email revenue inside this exact 60-day window. Gimme Seaweed's flows went from 46% to 67% of email revenue over the first months of the engagement.

The Attribution Trap: Read This Before You Believe Any Agency's Revenue Numbers

Here is the thing almost no agency ranking will tell you, from our founder, who has audited hundreds of Klaviyo accounts: the single most common way brands get misled is attribution settings.

Klaviyo will tell you something like "30% of your revenue was driven through Klaviyo." Whether that number means anything depends entirely on how attribution is configured. We have opened accounts where attribution was set to a 14-day window counting anyone who merely opened an email. Under those settings, email gets credit for nearly every purchase in a two-week span, whether or not email did the work.

Think about a real customer journey. Someone sees an ad, visits your site, joins your welcome flow, clicks an email, abandons, sees another ad, gets a browse-abandonment email, and finally purchases. Was email responsible? Partly. Were ads responsible? Also partly. Which mattered more? Genuinely hard to say. Attribution is more art than science, and anyone who pretends otherwise is selling something.

This is exactly why revenue-share pricing is usually a red flag. An agency paid a percentage of Klaviyo-attributed revenue has a direct financial incentive to widen your attribution window and count opens, inflating the number their fee is based on. To be completely transparent about our own incentives: if a brand insists on revenue share, we will happily take that deal, because we would earn more than we do on our retainers. That is precisely the problem, and it is why we price on retainers instead.

What to do instead: before trusting any attributed-revenue claim, ask what the attribution window is, whether it counts opens or only clicks, and whether it matches how you measure your other channels. Then judge the agency on numbers you have verified.

Should You Hire an Agency, a Freelancer, or Go In-House?

Our founder has been on every side of this: in-house at an ecommerce brand working with agencies, freelancing, working inside another agency, and now running one. The honest answer is that it depends, and here is the piece most comparisons miss: an agency is not one person. A real agency account team is a strategist, a project manager, a copywriter, a designer, and a Klaviyo implementation specialist. An in-house hire or freelancer is one person who has to cover all of that, and people who are genuinely strong at strategy, copy, design, and implementation at once are rare.

	Agency	Freelancer	In-house hire
What you get	A team of 5 specialists	One person, 1-2 skill sets	One person, one skill set
Monthly cost	$1,500-18,000+	$1,000-5,000	$6,000-10,000+ ($70-80K salary + overhead)
Brand knowledge	Good after onboarding	Moderate	Deepest possible
Flexibility	Process-bound, plans ahead	Medium	"Need it tomorrow? Done."
Risk when it ends	30-day-ish notice, handoff docs	Can drop you for a better client	Two weeks' notice, scramble
Experience breadth	Patterns from hundreds of brands	Several brands	Your brand only

In-house, honestly: $70,000 to $80,000 gets you a decent email strategist, not a deeply senior retention operator. They will know your brand better than any agency ever will, and they can turn things around same-day. But if they underperform, letting someone go in-house is a long, painful, documented process, and when they quit you have two weeks to scramble.

Freelancer, honestly: a great freelancer can be a steal: senior talent that wants a few clients at a few grand each. They bring more strategic depth than most in-house hires and see multiple brands, so they are plugged into the industry. But they hold only a few client slots, and if someone pays more, you can be replaced (our founder did exactly that back in her freelancing days). Finding freelancers who are both strategic and execution-strong is hard.

Agency, honestly: most agencies suck, so vetting is everything (next section). And you have to be a good client: agencies serve many brands and run on process, so they will never match in-house flexibility, and success partly depends on you respecting their process and investing real time in onboarding them. What you get in exchange is an entire specialist team at roughly the cost of a freelancer, senior-level strategy informed by patterns across hundreds of brands, and easy exit terms with a proper handoff when it ends. A wrong-fit agency, though, has you paying a premium for a junior team with weak processes and an overloaded roster.

In short, go with:

• In-house if you value flexibility above all: last-minute sends, campaign changes on a whim, and someone so plugged into the brand they will debate whether a subject line should say "and" instead of "but."
• A freelancer if you already have a copywriter, designer, and implementation person and just need strategy and planning, and you are OK giving more lead time.
• An agency if you want the full scope of specialists at the best value, or senior strategic firepower at a fraction of in-house cost, and you are willing to follow their process and plan ahead.

How Do You Vet an Agency Before Signing?

Six steps, in order:

1. Ask for testimonials, case studies, and ideally a client referral. If someone in your network can refer you to an agency they have actually used, even better. Video testimonials beat written ones; a reference call beats both.
2. Meet the team you will actually work with, not just the sales team. Ideally in person or on video. Skill matters, and so does chemistry: you will spend every week with these people, and "extremely knowledgeable but you dread the calls" is a bad trade.
3. Ask for a sample email. Understand it will not be as good as post-onboarding work, because they barely know your brand yet. It will tell you whether the direction is right.
4. Get really clear on their process before signing. What happens in the first 60 days, what the cadence is, what they need from you.
5. Agree on the success KPI and its timeline before any contract is signed. Both sides should know exactly what "working" means and by when.
6. Ask about strategy development. Do they give you a revenue forecast? What does reporting look like? How do they plan content calendars?

And the questions that actually reveal an agency on a sales call:

• Which clients succeed most with you?
• Which clients usually do not succeed with you?
• Be honest: what are you best at, and what are you weakest at?
• What are you better at than other agencies?
• Can I meet the exact team I will be working with?
• What is your process, and what will our cadence be?

An agency that answers the "weakest at" question honestly will also be honest when your numbers dip.

Red flags inside your Klaviyo account after hiring: attribution settings quietly widened (long windows, open-based attribution) to inflate reported revenue. Campaigns sent to the full list with no segmentation. Flows unchanged 90 days in. Open-rate "wins" driven by Apple Mail Privacy Protection inflation rather than clicks or revenue. No monthly reporting. And no clear 90-day strategic roadmap of what your strategist is tackling next: if you do not know what your agency is doing next month, neither do they.

What Should You Do Next?

If you run an 8-figure ecommerce brand and email and SMS drive less than 30% of your revenue, the fastest next step is a teardown of your current Klaviyo account. Book a 30-minute audit with our CEO, Melanie Balke. You get a personalized retention roadmap whether or not we ever work together.

If you are earlier-stage or want to keep it in-house, start with these resources:

• 7 Things You Should Ask Before Hiring an Email Marketing Agency
• Email Marketing Agency Pricing: What It Actually Costs
• Klaviyo vs. Mailchimp
• What Makes Us a Klaviyo-Specialized Email Marketing Agency

Frequently Asked Questions

How much does a Klaviyo email marketing agency cost per month?

Between $1,500 and $18,000+ per month in 2026. Production shops like InboxArmy start around $1,500/month. Specialist retention agencies typically run $2,500-10,000/month. The Email Marketers starts at $4,400/month, averages $6,500/month, and reaches $18,000/month at full scope.

What is a Klaviyo Master Elite partner, and does it matter?

Master Elite is Klaviyo's legacy top-tier agency designation, held by roughly 20-30 agencies worldwide. Tiers are earned largely through referred business and volume of managed accounts, so treat any tier as a signal that an agency is established and certified, not as proof of quality. Verify current tiers at connect.klaviyo.com.

How long does it take to see results from a Klaviyo agency?

First revenue lift typically arrives in 2-4 weeks from quick wins: fixing broken flows, deliverability repairs, and reactivating dormant segments. Sustained, compounding improvement takes 60-90 days as rebuilt flows and segmentation mature.

What percentage of revenue should email marketing drive?

A well-run DTC email and SMS program typically drives 30-50% of total store revenue, but verify how that number is measured before celebrating it. Check the attribution window and whether it counts opens or only clicks. As a real example with clean attribution, TEM client Gimme Seaweed's email program represents roughly 25% of total revenue, with flows generating 67% of email revenue.

Is revenue-share pricing for an email agency a good idea?

Usually not. An agency paid a percentage of Klaviyo-attributed revenue has a built-in incentive to widen attribution windows and count email opens, which inflates the number its fee is based on. Retainer pricing keeps the agency's incentives aligned with numbers you can verify.

Should I hire a Klaviyo agency if my brand does under $1M in revenue?

Usually not. Under roughly $1M, agency retainers eat the ROI. A skilled freelancer, Klaviyo's onboarding resources, or a done-with-you program (like The Email Marketers' Retention Lab) is the better buy. Revisit agencies at $3-5M+ when list size makes every flow improvement worth thousands per month.

Do Klaviyo agencies also handle SMS?

Most on this list do. Flowium, Chronos, Magnet Monster, Sticky Digital, and The Email Marketers all run SMS alongside email. Magnet Monster adds WhatsApp and direct mail. The Email Marketers adds direct mail, subscriptions, memberships, and referral and loyalty programs.

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About the author

Melanie Balke is the founder and CEO of The Email Marketers, a retention marketing agency for 8-figure ecommerce brands. She has worked retention from every seat: in-house at an ecommerce brand, as a freelancer, inside another agency, and since 2019 running her own. Her team generated over $100 million in attributed email and SMS revenue for clients in 2025 alone. Clients include Grüns, Gimme Seaweed, Eleven Outdoors (the brand behind K2 Skis and Völkl), Open Store, Outer Furniture, The Freeze Pipe, and Llama Naturals. She has been featured in Business Insider and Authority Magazine. Connect on LinkedIn or X.

Methodology: rankings reflect Klaviyo partner-directory tiers, published pricing, Clutch review data, stated client focus, and public case studies as of July 2026, weighted toward verifiability. The Email Marketers publishes this guide; competitor descriptions are drawn from each agency's own site, Clutch profile, and Klaviyo directory listing, and each entry includes honest fit-limitations, including our own.