Ecommerce SMS Marketing Services
SMS isn't "blast a 20%-off code to everyone and hope." Done that way, it's a fast track to opt-outs and a channel customers learn to ignore. Done right, it's the highest-engagement owned channel in ecommerce — messages that get read in minutes, driving revenue email simply can't reach in time. Most brands sit at one of two extremes: ignoring SMS entirely, or abusing it until the list churns. Both leave money on the table.
We run ecommerce SMS marketing services as a disciplined revenue channel — one that compounds with email rather than replacing it. Flypost is a certified Klaviyo partner that runs email and SMS as a single coordinated program, so the two channels reinforce each other instead of competing for the same customer's attention.
Book a free intro call if you're ready to add SMS the right way. Read on for what that actually looks like.
Why SMS for Ecommerce
Email is the workhorse of owned revenue. But there's a category of moments email is structurally too slow or too crowded to win — and that's exactly where SMS earns its place.
- Time-sensitive drops and restocks. A limited release or a flash sale lives and dies in hours. An SMS lands and gets read in minutes; an email sits unopened until tonight, after the product's gone.
- Back-in-stock. The customer wanted it, it sold out, it's back. SMS turns that into an instant purchase instead of a missed window.
- Cart and checkout recovery follow-up. Email recovers carts well. A well-timed SMS catches the buyers email misses — the ones who skim their inbox but always read a text.
SMS read rates dwarf email open rates, and the immediacy is the entire point: it captures revenue that's only available inside a narrow window. The catch is that the same immediacy makes it easy to overdo. A channel this direct has to be run with restraint — which is the whole job.
What's Included
A real SMS program is more than a list and a discount code. Here's the full scope.
SMS strategy and channel setup
Revenue targets for SMS, where it fits in your channel mix, and how it sequences with email. Platform setup done correctly — dedicated number or short code, compliant signup, and reporting wired to revenue from day one.
SMS flows
The automated set, built for SMS rather than copy-pasted from email: welcome, abandoned cart, browse abandonment, back-in-stock, post-purchase, and winback. Each one timed and segmented so it earns its place in the customer's inbox — and triggered in coordination with the matching email flow so the two never fire on top of each other.
Campaign management and calendar
A planned SMS campaign calendar, coordinated with your email calendar and your promotional and product schedule. We pick the moments where SMS adds urgency — drops, restocks, last-chance sends — rather than texting your whole list every week until they tune out.
List growth and opt-in
Compliant list growth that actually converts: pop-up and checkout opt-in, properly structured so consent is clean and the subscriber knows what they signed up for. A well-built opt-in is the difference between a list that drives revenue and one that drives complaints.
Compliance
We handle SMS the way it has to be handled: consent captured properly, quiet hours respected, opt-out honored instantly, and messaging cadence kept on the right side of best practice. We build to TCPA-aligned consent and opt-out standards as a matter of course — measured and accurate, not alarmist, and not a substitute for your own legal review. (More on this in the FAQ below.)
Email and SMS integration
The piece most brands miss. We run email and SMS from a single strategy so they don't cannibalize each other or double-message the same customer. One customer journey, two channels, coordinated sequencing — the whole reason to run both under one roof.
Platforms We Work On
Postscript is our primary SMS platform — purpose-built for ecommerce SMS on Shopify and Shopify Plus, with the deepest flow and segmentation tooling for the channel. For brands that want everything in one place, we also run Klaviyo SMS, which keeps email and SMS natively unified on a single platform and shared segments.
Which one fits depends on your stack and how serious your SMS revenue ambitions are. We make that call with you on the audit — and as a certified Klaviyo partner running both, we recommend the platform that fits your program, not the one that's easiest for us.
Pricing
SMS is typically bundled with your email retainer or added as a scope tier, set after the audit — consistent with how we price email marketing services. We don't quote a number before we've seen your account and your list, because that's just guessing. We're transparent about the range on the first call.
Want to frame the upside of adding a channel before you talk to anyone? Run the numbers through the Email Revenue Potential Calculator.
Proof
SMS rarely works in isolation — it works as the high-urgency layer on top of a strong email program. Our results reflect that: across the portfolio, brands like Linus Bikes (150% sales lift, $270K in email revenue) and Western Bagel ($137K incremental) built coordinated email-and-SMS programs where SMS captured the time-sensitive revenue email couldn't. We report SMS revenue separately so you always see what the channel contributes on its own.
You can see the full set of results on our case studies.
Who It's For
This is for DTC and ecommerce brands doing $1M–$50M+ that are already running email — or ready to — and want to add a coordinated SMS channel without the two stepping on each other. SMS compounds an existing email program; it's not a shortcut around building one.
If you don't have email running yet, start there — our email marketing services are the foundation SMS builds on. Not sure where you stand? Take the Email Marketing Fit Check for a quick, honest read.
Why Flypost
We run email and SMS as one program, not two vendors with two contracts and two calendars that quietly over-message your customers. Strategy, design, deliverability, compliance, and execution under one roof. We're a certified Klaviyo partner, we measure SMS against revenue rather than vanity metrics, and we run the channel with the restraint that keeps a list healthy instead of churning it for a quick spike.
Book a free intro call → to talk through adding SMS — or take the Fit Check first.
Frequently Asked Questions
Is SMS marketing worth it for ecommerce?
For brands already running email, yes — SMS is the highest-engagement owned channel, with read rates well above email open rates and the immediacy to capture revenue email is too slow to reach: limited drops, restocks, and last-chance sends. The caveat is that it only pays off when it's run with discipline. A coordinated email-and-SMS program compounds; a list blasted with discount codes churns. Run the Email Revenue Potential Calculator to frame the upside for your brand.
Is SMS compliant — what about TCPA?
SMS marketing is fully viable when it's run on proper consent. We build to TCPA-aligned best practices as standard: clear opt-in at signup, respected quiet hours, instant opt-out handling, and a sending cadence that stays on the right side of the line. To be clear, this is best-practice consent handling, not legal advice or a guarantee — your own counsel should review your specific setup. Done correctly, compliance and performance point the same direction: a clean, consented list is also your most responsive one.
Postscript vs. Klaviyo SMS — which should I use?
Postscript is purpose-built for ecommerce SMS on Shopify, with the deepest dedicated tooling for flows, segmentation, and list growth — a strong fit when SMS is a serious revenue line of its own. Klaviyo SMS keeps email and SMS natively unified on one platform with shared segments, which many brands prefer for simplicity. We run both and pick the fit with you on the audit. We're a certified Klaviyo partner, but we won't put you on the wrong platform to make our lives easier.
Will SMS annoy my customers?
Only if it's run badly. Over-messaging, irrelevant blasts, and ignoring opt-outs are what drive complaints and churn — and they're exactly what we don't do. We run SMS with restraint: the right moments, the right segments, coordinated with email so a customer never gets hit twice for the same thing. Used for genuine value — a restock they wanted, a drop they'd hate to miss — SMS reads as a service, not a nuisance.
Do I need email before SMS?
In nearly all cases, yes. SMS is the high-urgency layer on top of a strong email program — it compounds email rather than replacing it, and it works best when the two are coordinated from one strategy. If email isn't running yet, that's the place to start; our email marketing services are the foundation, and SMS layers on once email is pulling its weight.
Book a free intro call → to talk through adding a coordinated SMS channel. Or run the Email Revenue Potential Calculator to see what adding the channel could be worth.
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Book a Free Email Marketing Audit
Get a tailored evaluation of your current strategy, uncover hidden growth opportunities, and see how Flypost can unlock more revenue.
If you have any questions, reach out to: dwight@flypost.agency
Brands We’ve Worked With
“Flypost’s email marketing expertise was a game-changer for us, driving remarkable results and contributing significantly to our success.”
Brie, Marketing Director at Linus Bike
