Best Ecommerce Email Marketing Agencies for Shopify Brands (2027): 10 Compared

The best ecommerce email marketing agencies for Shopify brands in 2027 are Flowium, One 10 Media, InboxArmy, The Email Marketers, Hustler Marketing, Sticky Digital, Sweat Pants Agency, CodeCrew, Chronos Agency and Threadpoint.

We compared all 10 for US Shopify brands with $2M+ in annual revenue on Klaviyo partner tier, published results, Clutch reviews, pricing transparency and how much each one works on the Shopify store itself, using each agency's own website, Klaviyo's partner directory and Clutch, checked on November 2, 2026.

Quick picks: Flowium for a Klaviyo-first email and SMS program, One 10 Media for email and paid ads from one team, InboxArmy for a published price (from $1,500 per month), and The Email Marketers for 8-figure DTC brands.

About this list: craftberry, a Shopify Premier Partner, publishes this list and is not ranked on it. We build and migrate the Shopify stores that email programs run on, so we also noted which parts of the store each agency leaves to a Shopify partner. No agency paid to appear.

What is a good ecommerce email marketing agency?

A good ecommerce email marketing agency holds a high Klaviyo partner tier, publishes named results with numbers, is open about how it charges and understands the Shopify store data its flows depend on.

Here is how those qualities showed up when we compared the 10 agencies on this list and audited Shopify stores in 2026:

• ✓Klaviyo depth is the first filter. Nine of the 10 agencies here hold a tier in Klaviyo's partner directory, from Silver to Elite, and Klaviyo is the default email platform on the Shopify stores we build.
• ✓Published results beat logo walls. Named clients with numbers on the agency's own site say more than a list of brands.
• ✓Few agencies publish prices. Of the 10 agencies here, only InboxArmy shows a fee on its own site, so compare scope, team seniority and contract terms before price.
• ✓Many email problems start in the store. In 7 CRO and checkout audits we ran in 2026, the email failures we found most often were store problems: newsletter codes rejected at checkout and email traffic converting well but barely captured.
• ✓Clutch reviews separate the field. InboxArmy (72 reviews), Chronos Agency (59) and One 10 Media (31) have the deepest review records, while Sticky Digital has none yet and Threadpoint has one.

What do email marketing agencies handle?

Email marketing agencies handle an ecommerce brand's automated flows, campaigns, segmentation, deliverability, SMS and revenue reporting, usually inside Klaviyo. A good one is measured on revenue per recipient and on email's share of store revenue, not on open rates.

Here is what each of those areas covers day to day:

• ✓Flows: welcome, browse abandonment, abandoned cart and checkout, post-purchase, replenishment, win-back and sunset. These run every day without anyone pressing send.
• ✓Campaigns: the calendar of launches, promotions and content sends, including peak periods such as Black Friday.
• ✓Segmentation: groups built from purchase history, browsing and engagement, so that a first-time buyer and a fifth-time buyer do not get the same email.
• ✓Deliverability: domain authentication, list hygiene and sending reputation, so that email lands in the inbox at all.
• ✓SMS and other channels: text messages, push and sometimes WhatsApp or direct mail, coordinated with email.
• ✓Reporting: flow and campaign revenue, revenue per recipient and email's share of total store revenue.

What most agencies do not touch is the store itself: the signup forms, the tracking that feeds Klaviyo, the checkout where a newsletter code is redeemed, and the customer data that has to survive a replatform. That split matters, and we come back to it in the section on why Klaviyo flows underperform.

How do you evaluate an email marketing agency?

Evaluate an email marketing agency on how deep its Klaviyo partnership goes, whether it names clients and numbers, what independent reviewers say, whether it shows a price and how much of the Shopify store it can work on. Where an agency reports its own results, we label them as agency-reported, and we re-check every fact on this list each quarter.

Here is what each of the five criteria checks:

• ✓Klaviyo depth: the partner tier Klaviyo lists in its partner directory. Where the agency's site and the directory disagree, we use the directory's wording.
• ✓Published results: named clients with revenue or growth figures on the agency's own site.
• ✓Independent reviews: Clutch rating and review count.
• ✓Pricing transparency: whether a fee is shown on the agency's own site before the first call.
• ✓Shopify depth: whether the agency can work on the store itself, including tracking, signup capture, checkout and migrations.

Order reflects how well each agency answers those questions for a US Shopify brand with $2M+ in annual revenue. Klaviyo depth and published results carry the most weight. None of the 10 works on the store itself, so store-side fixes need a Shopify partner alongside whichever agency you pick. A lower position does not mean a weak agency: several of them are the better choice for a particular category, stage or budget.

Who are the best email marketing agencies?

The best email marketing agencies are the ones that match your channel mix and growth stage: Flowium leads this ranking on Klaviyo depth and named results, followed by One 10 Media, InboxArmy and The Email Marketers.

The full ranking is below.

What are the best email marketing agency options?

The best email marketing agency options for Shopify brands are the 10 agencies profiled below, and they differ most on Klaviyo tier, how much of the Shopify store they work on, whether they publish results with numbers and whether they show a fee. Each profile below covers the same points: best fit, scope, credentials, results, fees, what to check and website.

1. Flowium: best for brands that want a Klaviyo-first email and SMS program

Flowium is a US retention agency with a large, specialized team that runs Klaviyo email and other owned channels for ecommerce brands.

Scope: email, SMS, push, WhatsApp, RCS, Instagram DM automation and direct mail.

Credentials: Klaviyo Master Elite partner. An Inc. 5000 honoree in 2025, per its homepage.

True Classic grew email revenue 46% in seven days, and DORADO grew attributed email revenue 138.8% over Black Friday (case studies). Clutch: 4.9 from 23 reviews.

Fees and terms: not published. Flowium advertises a two-year price lock and no long-term contracts.

Worth checking: it is a channel specialist and does not work on themes or checkout, so store-side issues need another team.

2. One 10 Media: best for DTC brands that want email, SMS and paid media from one team

One 10 Media is a growth agency in Medina, Ohio that runs Klaviyo email and SMS alongside Meta and Google ads.

Scope: email and SMS flows, campaigns, pop-ups and testing, plus Meta and Google ads and creative.

Credentials: listed as a Gold Master partner in Klaviyo's directory, a Shopify Partner and a Meta Business Partner. It reports 500+ ecommerce brands served (agency-reported).

Urban Body Jewelry earned $2.47M in owned-channel revenue, 31% of its total, with flow revenue up 32% year over year. Element Wheels grew owned revenue from 9% to 33% of its total and added $1.7M in lifecycle revenue in its first year. Clutch: 4.9 from 31 reviews.

Fees and terms: not published.

Worth checking: its email page shows a different Klaviyo tier from the one in Klaviyo's directory, so confirm the current tier on the first call.

3. InboxArmy: best for multi-platform teams that need production capacity at a published price

InboxArmy is a US email marketing firm handling strategy, production and campaign management across 40+ email platforms.

Scope: campaigns, automation, template design and coding, deliverability, platform migrations, SMS and push, including white-label work for other agencies.

Credentials: 120+ email specialists and 5,000+ brands served (agency-reported). No Klaviyo tier is stated on its site.

Maven Lane earned $700K+ in six months, $641,826 of it from automations, and BoieUSA grew holiday revenue 770%. Clutch: 4.9 from 72 reviews, the most on this list.

Fees and terms: "The minimum for our monthly managed services is $1,500 per month"

Worth checking: it serves many industries, so DTC-specific strategy is something to test on the first call.

4. The Email Marketers: best for 8-figure DTC brands that want senior-led retention

The Email Marketers is a Santa Monica retention agency running senior-led programs across several owned channels, often for VC or PE backed brands.

Scope: email, SMS, direct mail, loyalty and referrals, subscriptions and memberships.

Credentials: listed as a Platinum Master partner in Klaviyo's directory. It reports $103M+ in attributed client revenue in 2025 (agency-reported).

Llama Naturals grew email revenue from $8,527 to $79,733, and Prime Neckwear grew flow revenue 191% in 90 days (case study). Clutch: 5.0 from 4 reviews.

Fees and terms: not published on its site.

Worth checking: four Clutch reviews is a small sample, so ask for references from brands in your category.

5. Hustler Marketing: best for brands that want a small dedicated team with a capped client load

Hustler Marketing is an email and SMS agency for ecommerce brands, delivered by a remote team.

Scope: email and SMS, plus UGC ad creative and HubSpot CRM work. Flows are built as a one-time project and campaigns run on a monthly retainer.

Credentials: Klaviyo Elite Master partner. Each client gets a four-person team, and account managers handle at most three stores. It reports 450+ brands served and $110M generated for clients in 2025 (agency-reported).

It publishes agency-wide figures; its case studies do not name client numbers. Clutch: 5.0 from 17 reviews.

Fees and terms: not published; its site says pricing depends on what you need.

Worth checking: ask for named results for a brand of your size, since the site does not show them.

6. Sticky Digital: best for $5M to $100M+ beauty, wellness, food and apparel brands

Sticky Digital is a Shopify-focused retention agency covering email, SMS, loyalty and subscriptions for DTC brands.

Scope: email, SMS, loyalty, subscriptions on Recharge, Stay.ai and Ordergroove, push, wallet passes and direct mail.

Credentials: Klaviyo Platinum Master partner. It says it has taken 50+ brands from $1M to $10M and from $10M to $50M+ (agency-reported).

Nest New York's subscription program grew more than 200% in one year

Fees and terms: not published.

Worth checking: its site is stickydigital.io; a .com with a similar name is a different company. No Clutch reviews yet.

7. Sweat Pants Agency: best for $3M to $100M+ DTC brands that want email and paid ads together

Sweat Pants Agency is a Nashville agency for DTC and subscription brands that runs Klaviyo email and SMS alongside Meta, Google and AppLovin ads.

Scope: email and SMS on Klaviyo, Meta, Google and AppLovin ads, and creative. Contracts are month to month with no setup fees.

Credentials: listed as a Silver Master partner in Klaviyo's directory. It reports 4.3 billion emails sent and $271M+ in attributed revenue (agency-reported).

Five brands earned $6.59M in combined email and SMS revenue over Black Friday and Cyber Monday 2025, with 70% average year-over-year growth. A GLP-1 subscription brand grew email and SMS revenue 9x in 30 days. Clutch: 5.0 from 9 reviews.

Fees and terms: not published; quotes are scoped to monthly email and SMS volume.

Worth checking: much of its published work is in paid media, so ask who on the team runs email day to day.

8. CodeCrew: best for brands that want a full email team on Klaviyo or another platform

CodeCrew is a Concord, California email agency with 40+ staff working across Klaviyo, Braze, Salesforce, Omnisend, Mailchimp, HubSpot and other platforms.

Scope: strategy, design and coding, automation, deliverability, A/B testing, SMS through Klaviyo, Attentive or Twilio, and loyalty.

Credentials: listed as a Silver Master partner in Klaviyo's directory. It reports an average client ROI above 1,300% (agency-reported, with no method published).

Semihandmade grew revenue more than 700% quarter over quarter (case study), and PetLab Co lifted its email click rate 53.33% and open rate 24.29%. Clutch: 4.8 from 9 reviews.

Fees and terms: not published; its pricing page shows Good, Better and Best tiers without amounts.

Worth checking: the PetLab Co result measures engagement rather than revenue, so ask for revenue figures from brands like yours.

9. Chronos Agency: best for fast-growing DTC brands that want a large, process-driven team

Chronos Agency is a retention agency based in Singapore, with a Sydney office, that runs email, SMS and push for ecommerce brands across about 11 email platforms.

Scope: email, SMS and push, plus WhatsApp, RCS, direct mail and paid media listed on its homepage.

Credentials: Klaviyo Master Elite partner and a Shopify Partner. It reports 500+ brands served to date and $400M+ in attributed revenue (agency-reported).

Kiyoko Beauty grew email revenue 3.4x over Black Friday 2024, and organifi grew email revenue 234%. Clutch: 4.8 from 59 reviews.

Fees and terms: not published.

Worth checking: the team works from Singapore and Sydney, so agree on meeting hours that suit a US team before signing.

10. Threadpoint: best for $3M to $30M Shopify brands that want a short, audit-led engagement

Threadpoint is an email and SMS agency in Manhattan Beach, California, founded in 2024, that works with Shopify and Shopify Plus brands.

Scope: email and SMS flows, campaigns, segmentation, list growth, design and copy, deliverability, and Klaviyo migrations and audits.

Credentials: Klaviyo Platinum Master partner. It reports a 40% average increase in email revenue across clients (agency-reported).

BrickHouse Nutrition grew average newsletter revenue from $19,065 to $31,267 and tripled revenue per recipient on its welcome series, and Limitless Walls added $70K in contribution margin in two months. Clutch: 5.0 from 1 review.

Fees and terms: not published; work is scoped after a free audit, and engagements typically run three months with no 12-month contract.

Worth checking: it was founded in 2024 and has one Clutch review, so ask for references from brands of your size.

What is the best email marketing agency for ecommerce?

The best email marketing agency for ecommerce depends on your revenue and platform: Flowium, One 10 Media, Hustler Marketing or Threadpoint for $2M to $10M brands on Klaviyo, The Email Marketers or Sticky Digital for $10M+ DTC brands, and InboxArmy or CodeCrew for brands on several email platforms. The table matches each situation to where the bottleneck usually sits:

If you are not on Shopify yet: fix the platform question first. An email program built on a store that is about to be replaced will need rebuilding after the Shopify migration.

Why aren't my Klaviyo flows performing?

Klaviyo flows usually underperform because of problems in the Shopify store, not because the emails are weak: welcome codes the checkout rejects, too few subscribers entering the flows, and store events that stop firing after a theme change or migration. A good email agency will spot these. Fixing them is Shopify work.

We see these problems in every migration, build and CRO audit we run. Here are the three that hold flows back most often, each with a check you can run yourself.

1. Newsletter discount codes fail at checkout

Newsletter codes usually fail because of store rules the email never mentioned, such as product exclusions, discounts that cannot stack or codes that break once the shopper logs in.

In a 2026 audit for a health retailer, customer feedback held 278 complaints about discount codes and loyalty points that did not work. One shopper put it plainly: "I enter the discount code from the newsletter I just received by e-mail, and the system won't accept it." In a checkout audit for a sports equipment brand, 43 shoppers described a code that was accepted and then silently removed.

The email did its job. The store broke the promise, and the shopper blames the brand, not the discount logic.

How to check: sign up from a fresh address, then redeem the welcome code on mobile with a sale item in the cart and again while logged in. If a code has exclusions, state them in the email and the popup before the shopper reaches checkout.

2. Email converts well but captures too few subscribers

Email usually stays small because the store captures too few subscribers, not because the emails are weak. In two of our 2026 audits, email was among the best-converting traffic sources and among the smallest. For a fashion brand, email visits converted at 2.02% against a 1.77% site average but made up 0.3% of sessions. For an automotive tech brand, email converted at 0.79% while social traffic converted at 0.04%, yet email brought only 1,136 sessions.

When email converts like that, the constraint is usually list growth, and list growth is a storefront job: the popup, the quiz, account creation and the offer behind them.

How to check: in GA4, compare the email channel's conversion rate with the site average, then look at its share of sessions. A high rate on a tiny share points to capture, not copy.

3. How do you test Klaviyo flows?

Test Klaviyo flows by checking that every store event that triggers them still fires: viewed product, added to cart, started checkout and placed order. A theme update or replatform can break any of them, and Klaviyo shows no error, so flow revenue drifts down with no alert.

On our migrations, Klaviyo sits on the standing list of scripts to carry over, alongside GA4, Google Tag Manager and the ad pixels. We connect tracking through Shopify's Customer Events rather than pasting scripts into the theme, and we test each event end to end before launch. A pixel that loads but never fires a purchase looks fine and reports nothing.

How to check: in Klaviyo, open Analytics, then Metrics, and look at the last time each store event fired. Anything older than a day on a store with steady traffic needs a look.

An email agency can only work with the data and signups the store sends. Need a Shopify partner to fix the store side? That is where our Shopify development and Shopify CRO teams usually come in.

From craftberry's Shopify engineers: when a client's email revenue drops after a launch, we check the events before the copy. In our experience the cause is more often a missing event or a broken code than a weaker subject line.

When should you hire an email marketing specialist?

Hire an email marketing specialist when your store tracks cleanly and the problem is campaign strategy, copy or cadence; the specialists above run that work day to day. We set up Klaviyo and the core flows as part of a build, but we do not run ongoing campaign calendars.

If the problem sits in the store, or you are planning a Shopify migration, we are the team to talk to.

"They were a high-energy team driven by a focused intention to support the technology side of your business." Angel Dimitrov, CEO, NL BEAUTY (Clutch review)

How much do agencies charge for email marketing?

Agencies charge for email marketing through monthly retainers or one-off projects, and most do not publish the amounts.

Among the 10 agencies on this list, only InboxArmy publishes a fee, a $1,500 monthly minimum for managed services; the others quote after a discovery call. Your email platform's own subscription is billed separately, on top of any agency fee.

Here is how the agencies on this list charge:

When you compare quotes, line up what each fee includes: number of campaigns per month, flow builds, design, SMS, reporting and who attends the calls. A lower fee that leaves out flow work or design often costs more once those pieces are bought separately.

If an audit points to fixes in the store itself, budget for them separately: at craftberry, store builds and migrations start from $15K and CRO retainers from $3,500 per month.

One caution on directories: the minimum figures shown on agency profiles on sites such as Clutch are usually minimum project sizes, not monthly retainers, so they are a poor guide to what an ongoing program costs.

Are email marketing agencies worth it?

Email marketing agencies are worth it once email is a meaningful revenue line and nobody in-house owns lifecycle full time. Smaller stores often get more from a strong freelancer, and larger brands with a CRM lead may only need production help. The deciding factor is who owns the strategy, not who presses send.

How do I choose an email marketing agency?

Choose by putting the same six questions to every finalist, covering team, reporting, store knowledge, results, account ownership and exit terms. Their answers separate agencies faster than a portfolio does.

• ✓Who works on our account each week, and how many other accounts does that person manage?
• ✓Which numbers lead the monthly report: revenue per recipient, flow revenue, email's share of store revenue or open rates?
• ✓What would you check first if abandoned checkout revenue dropped 30% overnight? An email-only answer is about copy and offers. A store-aware answer starts with whether the checkout event still fires.
• ✓Which named results with numbers can you show for brands of our size and category?
• ✓Do the Klaviyo account, templates and data stay under our ownership if we part ways?
• ✓How much notice ends the contract, and what happens in the first 90 days if results lag?

Red flags to avoid

The main red flags are reports built on open rates, no named account lead, campaigns planned before flows, an agency-owned Klaviyo account and long lock-ins.

• ✓Reports built on open rates. Apple Mail Privacy Protection inflates opens for every sender, so opens say little about revenue.
• ✓No named person on the account. A shared inbox and a rotating team usually mean junior staff.
• ✓Campaigns before flows. A plan that starts with a send calendar and skips a flow audit leaves the always-on revenue untouched.
• ✓The agency owns the account. Your Klaviyo account, lists and templates should always sit under your own login.
• ✓Long lock-ins before any results. Twelve-month terms with no exit clause put all the risk on the brand.

What is the best email marketing agency?

The best email marketing agency for most ecommerce brands is Flowium for a Klaviyo-led email and SMS program, One 10 Media for email and paid ads together, and InboxArmy for a published price. If the store side holds email back, start with a Shopify partner.

Need a Shopify partner for the store side of email?

At craftberry, our 30+ in-house specialists have delivered 800+ Shopify projects since 2015.

On every store we launch or migrate, we connect Klaviyo, set up event tracking and design the signup capture that your email agency depends on.

Talk to our team about your store.