Ecommerce Email Marketing Agency | Klaviyo Flows, Campaigns & SMS

Updated September 2026 · Written and maintained by the Progression Agency strategy team

An ecommerce email marketing agency runs the email and SMS program of an online store: the automated flows (welcome, abandoned cart, browse, post-purchase, win-back), the campaign calendar, list growth, segmentation, deliverability and SMS, usually in Klaviyo, measured by revenue per recipient and repeat purchase rate. WooCommerce email marketing works on the same model, provided the store’s order, cart and product data sync to the email platform cleanly. Out of New York, Progression Agency runs ecommerce email and SMS for stores across the United States and worldwide. This page explains what the program covers, which flows matter, how campaigns and SMS fit, how list growth and deliverability are handled, what an ecommerce email agency should report, and what it costs.

On this page · 14 sections

Where email and SMS fit in ecommerce marketing
The flows that produce most of the revenue
Campaigns: calendar and segmentation
SMS alongside email
List growth
Deliverability
Design and copy
Klaviyo and other platforms
Mailchimp vs Klaviyo for an online store
Measurement: the numbers that matter
What an ecommerce email marketing agency delivers each month
How to choose an ecommerce email marketing agency
What it costs: ecommerce email marketing
Related services and guides

The short answerEmail and SMS are the cheapest revenue an online store has and the most neglected. The program that works is five to eight automated flows built and tested first, a campaign calendar that sends to segments rather than the whole list, list growth at every entry point, SMS for the moments it beats email, deliverability watched weekly, and reporting on revenue per recipient, flow revenue and repeat purchase rate rather than open rates. An ecommerce email marketing agency should own all of it in your Klaviyo or comparable account.

Ranges on this page are published US price bands (market figures, not a Progression rate card); a quote follows a written scope.

Where email and SMS fit in ecommerce marketing

Acquisition buys the first order; email and SMS earn the second and third. Our ecommerce marketing agency page covers the full system; email marketing service covers email for other business types. This page is the store’s retention engine.

One program covers every version of this request. Some stores want a platform specialist: a Klaviyo agency, a Klaviyo email marketing agency or a Shopify email marketing agency. Others ask for an ecom email marketing agency or e commerce email marketing agency, an email marketing agency for ecommerce or a retention marketing agency. Their questions tend to cover Klaviyo flows, an abandoned cart flow, ecommerce SMS marketing, email marketing agency prices and revenue per recipient.

The flows that produce most of the revenue

Core ecommerce email and SMS flows
Flow	Trigger	What it does
Welcome	New subscriber	Introduces the brand, sets expectations, converts with an offer or best sellers
Abandoned cart and checkout	Cart or checkout left	Recovers the order with reminders, objections answered, then an offer if needed
Browse abandonment	Product viewed, no cart	Brings back interest with the product and alternatives
Post-purchase	Order placed	Confirms, educates, cross-sells, asks for a review at the right time
Replenishment and repeat	Time since purchase	Reminds when the product runs out or a repeat is due
Win-back	No purchase in a set period	Re-engages lapsed customers with reasons to return
VIP and loyalty	Spend or frequency threshold	Rewards best customers and early access
Back in stock and price drop	Inventory or price change	Notifies interested customers

Campaigns: calendar and segmentation

Campaigns follow a calendar tied to launches, seasons and promotions, sent to segments (engaged, buyers, category interest, VIP) rather than the whole list, with content beyond discounts: product education, stories, user content. Sending everything to everyone trains subscribers to ignore the brand and damages deliverability. Black Friday email marketing starts well before the sale: warm up sending to your most engaged readers in the weeks ahead, then widen the audience as the date nears, so volume does not spike out of nowhere.

SMS alongside email

SMS wins for time-sensitive messages: cart recovery, shipping, launches, flash offers, VIP access. Consent is collected properly, frequency is limited, and quiet hours are respected under TCPA and carrier rules. SMS is measured on its own revenue and its effect on unsubscribes.

List growth

Pop-ups and embedded forms tuned by traffic source, checkout opt-ins, SMS capture, post-purchase capture, quizzes and content that earns a subscription. Growth is measured by subscribers who buy, not by list size.

Deliverability

Authentication (SPF, DKIM, DMARC), a dedicated sending domain, list hygiene, engagement-based sending and monitoring of inbox placement and complaints. A program that lands in spam earns nothing regardless of creative.

Design and copy

Templates built for phones, product blocks fed by the catalog, copy in the brand’s voice, accessibility and load considered. Tests run on subject lines, offers, send times and content types where volume allows.

Klaviyo and other platforms

Klaviyo for most Shopify and DTC stores; Omnisend, Attentive for SMS, Mailchimp or Braze where they fit. We work in your account, and the account, lists and flows are yours. Our Shopify agency page covers the platform side.

Mailchimp vs Klaviyo for an online store

Put the same four questions to each platform with your own store in mind: does it receive order and browse events without delay, can you build a segment from them, how does the monthly bill change as the list grows, and can you export lists and flow history if you leave. Mailchimp vs Klaviyo is easier to settle once those answers are written down. The same questions apply to Shopify Email vs Klaviyo, where the extra point is whether campaigns sent from the Shopify admin are enough or the program needs segments and flows. Klaviyo is our default for Shopify and DTC stores, we build in Mailchimp where it fits, and the account stays yours either way.

Measurement: the numbers that matter

Revenue per recipient by flow and campaign.
Flow revenue as a share of store revenue.
Repeat purchase rate and time to second order.
List growth by subscribers who buy.
Deliverability: inbox placement, complaints, unsubscribes.
SMS revenue and opt-out rate.

What an ecommerce email marketing agency delivers each month

Flow builds, tests and improvements.
Campaign calendar, design, copy and sends to segments.
SMS program and compliance.
List growth and form optimization.
Deliverability monitoring.
Reporting on revenue per recipient, flow share, repeat rate and list growth.

How to choose an ecommerce email marketing agency

Ask which flows they build first and why.
Ask how they segment campaigns.
Ask how deliverability is monitored.
Ask what they report: revenue per recipient and repeat rate, not open rates.
Ask who owns the account, lists and flows. You must.

What it costs: ecommerce email marketing

Email and content work is priced per deliverable or as a monthly program. For ecommerce email marketing, the price bands below are from our marketing agency pricing guide; a quote follows a list of flows, segments and the volume of content each month.

Email and content price bands (US market figures)
Service	Typical range	Notes
Email marketing management	$500 to $4,000 / month	Flow count and segmentation depth
Full lifecycle automation build	$4,000 to $18,000 one-off	Welcome, abandonment, winback, reactivation
Email sequence, five messages	$800 to $2,000	Segmentation complexity
SMS program	$500 to $3,500 / month	Consent handling is not optional
Blog post, 1,000 words	$400 to $1,200	Research depth, not word count
Landing page copy	$900 to $3,000	Offer strategy, not word count

Every figure above is a price band already published on this site; the quote for ecommerce email marketing follows a written scope, and the same ranges apply across the United States and worldwide. Scope for ecommerce email marketing automation is usually written flow by flow, so a quote moves mainly with the number of automated sequences and audience segments in the plan.

Pages on this site that sit next to ecommerce email marketing and that a buyer usually reads alongside it.

Getting found in search

AI, AEO and what is changing

Paid media and lead generation

Websites and design

Choosing and working with an agency

Software and app development

Web development, platforms and hosting

Social, content and brand

By industry and by situation

Frequently asked questions

What does an ecommerce email marketing agency do?

It builds and runs a store’s email and SMS program: automated flows, segmented campaigns, list growth, deliverability and SMS, usually in Klaviyo, measured by revenue per recipient and repeat purchase rate.

What does ecommerce email marketing management cost?

Email and SMS programs run $1,500 to $6,000 per month depending on flow count, campaign volume and SMS, with a flow build project of $2,500 to $8,000 up front where flows do not exist. Platform fees are separate. Ranges are published; quotes follow an account review.

Which flows should a store build first?

Welcome, abandoned cart and checkout, browse abandonment, post-purchase and win-back; then replenishment, VIP and back-in-stock.

Is Klaviyo the right platform?

For most Shopify and DTC stores, yes; we also work in Omnisend, Attentive, Mailchimp and Braze where they fit.

Should we send SMS?

For time-sensitive messages with proper consent and limited frequency, yes; it is measured on its own revenue and opt-out rate.

How often should a store email?

As often as the segments engage; typically two to four campaigns per week to engaged segments, fewer to the whole list.

What is revenue per recipient?

Revenue attributed to a send divided by the number who received it; the number we manage to alongside repeat purchase rate.

How do you grow the list?

Forms tuned by source, checkout and post-purchase capture, SMS capture and content that earns a subscription, measured by subscribers who buy.

How do you protect deliverability?

Authentication, a dedicated sending domain, list hygiene, engagement-based sending and monitoring of inbox placement and complaints.

Do you design and write the emails?

Yes: mobile-first templates, catalog-fed product blocks and copy in your voice.

Do you run tests?

Yes, on subject lines, offers, send times and content types where volume allows.

Can you take over an existing Klaviyo account?

Yes, with a written review of flows, segments and deliverability first.

Do you handle SMS compliance?

Yes: consent collection, quiet hours, frequency and opt-out handling under TCPA and carrier rules.

What share of revenue should email and SMS produce?

Many stores reach 20 to 35% of revenue from email and SMS; the right target depends on category and purchase frequency.

How soon will results show?

Flow builds produce revenue within the first month; campaign and list programs compound over a quarter.

Do you work with Shopify Plus and enterprise stores?

Yes, including multi-store and multi-region programs.

Who owns the account, lists and flows?

You do.

Is there a contract?

Month to month after setup, with a written scope and 30-day notice.

Do you work with stores outside New York?

Yes, across the United States and worldwide.

What is the first step?

Send read-only Klaviyo access or your platform and store size. You get a written review and a quote.

How large should a store be before email marketing for ecommerce needs an agency?

Order volume and repeat potential matter more than size. A store with a few orders a week can run a platform’s starter flows on its own. Outside help earns its fee once the flows exist but nobody has time to segment, test and run a calendar.

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Ecommerce Email Marketing Agency: Klaviyo Flows, Campaigns and SMS That Grow Repeat Revenue