SMS Marketing for Ecommerce: The 98% Open Rate Channel

Why the most ignored marketing channel produces the highest engagement rates in ecommerce

What Is Ecommerce SMS Marketing?

Texts sell. Fast.

Ecommerce SMS marketing is the use of text messages to send promotional, transactional, and automated messages to opted-in customers. SMS delivers a 98% open rate compared to email's 20%, with 90% of texts read within 3 minutes of delivery, according to Gartner and SimpleTexting's 2025 data.

Most store owners treat SMS like a backup channel. Something they will "get around to." Meanwhile, the brands running SMS correctly — Shopify stores like OLIPOP, Doe Lashes, and Jones Road Beauty — attribute 20-25% of their owned-channel revenue to text messages.

The difference between SMS that prints money and SMS that gets you reported as spam comes down to three things: consent architecture, flow design, and send frequency. Get these right, and you have the highest-ROI channel in your marketing stack. Get them wrong, and you are burning subscriber trust at 160 characters per message.

We have helped Shopify stores across Malaysia integrate SMS alongside email. The results follow a pattern: fast list growth, immediate revenue from automations, and a compounding effect when SMS and email work as a system.

Here is how to build it.

How Does SMS Compare to Email and Paid Ads?

The numbers are not close.

SMS outperforms email on every engagement metric: 98% open rate vs 20%, 36% click-through rate vs 2.5%, and a median ROI of $36 per dollar spent. Postscript and Attentive report that top-performing Shopify stores generate $2-$5 per SMS subscriber per month, compared to $0.50-$1.50 per email subscriber.

Here is the channel comparison:

Metric	SMS	Email	Paid Social Ads
Open rate	98%	18-22%	N/A
Click-through rate	19-36%	2-3%	0.9-1.5%
Average response time	90 seconds	6+ hours	N/A
Revenue per recipient	$0.20-$0.45	$0.08-$0.15	Varies by CPA
Cost per message	$0.01-$0.05	$0.001-$0.003	$0.50-$5.00 per click
ROI (median)	$36 per $1	$42 per $1	$2-$5 per $1
Consent required	Explicit opt-in	Opt-in (varies)	None

Sources: Postscript (2025), Omnisend, Klaviyo Benchmarks, Attentive annual report

Notice something. Email still has a higher raw ROI per dollar because sending costs are lower. But SMS wins on speed, engagement, and urgency. The stores winning at owned marketing run both — they are not picking one over the other.

The real question is not whether SMS works. It is whether you have the compliance infrastructure and flow design to make it work without burning your list.

Why Does SMS Get a 98% Open Rate?

Because texts are personal.

SMS achieves near-universal open rates because messages land in the same inbox as texts from family and friends. There is no spam folder, no promotions tab, no algorithmic filtering. Gartner's 2024 mobile engagement research confirms that 98% of SMS messages are opened, with 90% read within 3 minutes of receipt.

Think about your own phone. You might ignore 50 emails before lunch. You do not ignore texts. Neither do your customers.

This is also why SMS is dangerous if misused. The same intimacy that drives 98% open rates means customers react strongly to messages that feel irrelevant, too frequent, or pushy. One bad text and they opt out — permanently.

The stores that sustain high SMS engagement follow a rule: every text must feel like it came from a person, not a marketing department. Short copy. Clear value. Obvious reason for the text.

Which SMS Flows Should Every Ecommerce Store Run?

Five flows do the heavy lifting.

The five essential ecommerce SMS flows are: welcome series, abandoned cart, post-purchase, winback, and browse abandonment. Postscript data from 18,000 Shopify stores shows automated SMS flows generate 31% of total SMS revenue while accounting for only 5% of messages sent. The abandoned cart flow alone recovers 10-18% of lost carts.

1. Welcome flow (triggered on opt-in)

This is your highest-engagement moment. The subscriber just gave you their phone number. Send the first text within 60 seconds.

Message 1 (immediate): Deliver the promised incentive (discount, early access, free shipping). Include a direct link to shop.

Message 2 (24 hours later): Introduce the brand. One sentence about what makes you different. Link to bestsellers.

Conversion rate on welcome SMS: 12-18%, compared to 3-5% on welcome emails (Klaviyo 2025 benchmarks).

2. Abandoned cart flow (triggered on cart abandonment)

This pairs with your cart abandonment email strategy. SMS fires faster.

Message 1 (30-60 minutes after abandonment): "Hey [name], you left something behind." Include product name and cart link. No discount yet.

Message 2 (12-24 hours later): Add urgency. Stock levels, expiring offer, or social proof.

Recovery rate: 10-18% on SMS alone, up to 25% when combined with email (Omnisend, 2025).

3. Post-purchase flow (triggered on order confirmation)

Shipping updates, delivery confirmation, and a cross-sell 5-7 days after delivery. This is the flow most stores skip — and it is the one that builds repeat purchase behavior.

4. Winback flow (triggered at 60-90 days of inactivity)

A 2-3 message sequence targeting lapsed customers. "We miss you" does not work. Specific offers do: "Your favorite [product] is 15% off this weekend." Include the product they previously purchased.

5. Browse abandonment flow (triggered on product page views without add-to-cart)

The softest touch. A single text: "Still thinking about [product]?" with a link. No discount. No pressure. This flow only works with enough behavioral data — do not enable it until you have 90+ days of SMS subscriber activity.

How Do You Build an SMS Subscriber List?

Consent is everything.

SMS list building requires explicit opt-in under TCPA (US), PDPA (Malaysia and Singapore), and GDPR (EU). The most effective collection methods are pop-ups with SMS-specific incentives (converting 4-7% of site visitors), checkout opt-in checkboxes (converting 8-12% of buyers), and keyword-to-shortcode campaigns. Postscript reports the average Shopify store grows its SMS list at 10-15% per month when using multi-channel collection.

This is not email. You cannot just add people from a purchase. You need explicit, documented consent for marketing SMS. The penalties for non-compliance are severe: RM500,000 maximum fine under Malaysia's PDPA, and $500-$1,500 per unsolicited text under US TCPA.

Pop-up opt-in (highest volume)

Add a separate SMS field to your email pop-up. Or better — use a two-step: email first, then ask for phone number on the thank-you step. Justuno and Privy both support this.

Offer a different incentive for SMS than email. If email gets 10% off, SMS gets early access to drops or free shipping. Give them a reason to hand over their phone number.

Checkout opt-in (highest quality)

Add an SMS opt-in checkbox at checkout. These subscribers are buyers — they have the highest lifetime value. Shopify's checkout extensibility supports this natively through apps like Postscript, Attentive, and Klaviyo SMS.

Keyword campaigns (offline and social)

"Text STYLE to 55123 for 15% off." Use this on packaging inserts, social media bios, and in-store signage. Low volume, but high intent.

Does this sound like your store? Find out where you're leaking revenue — take the free Revenue Score. 3 minutes. Free. No pitch.

What Should You Write in an SMS Marketing Message?

Brevity wins. Every word costs space and attention.

The highest-converting ecommerce SMS messages are 160 characters or fewer, include a clear CTA with a shortened URL, use the recipient's first name, and communicate a single value proposition. Attentive's 2025 performance data shows that messages under 160 characters achieve 15% higher click-through rates than longer messages, and personalized texts convert 29% more than generic ones.

SMS copy rules

• One message = one action. Do not try to announce a sale, introduce a product, and ask for a review in the same text.
• Lead with value. What does the reader get? Say it first.
• Use their name. Personalization is not optional on SMS. It is the minimum.
• Include a link. Every marketing SMS needs a trackable, shortened URL pointing to the relevant page.
• Skip the emoji overload. One or two is fine. A wall of emojis signals spam.

Examples that convert

Abandoned cart: "Hey Sarah, your Midnight Serum is still in your cart. Grab it before stock runs out → [link]"

Flash sale: "24-hour drop: 20% off all cleansers. No code needed. Shop now → [link]"

Post-purchase: "Your order just shipped! Track it here → [link]. Reply HELP if you need anything."

Winback: "It's been a while, Sarah. Your favorite moisturizer is back in stock — want us to hold one? → [link]"

Notice the pattern: short, specific, one clear action.

How Often Should You Send SMS Campaigns?

Less than you think.

The optimal SMS campaign frequency for ecommerce is 4-6 messages per month, including both automated flows and manual campaigns. Postscript's 2025 analysis of 18,000 Shopify stores found that exceeding 8 messages per month increases unsubscribe rates by 28% without proportional revenue gains. The sweet spot is 1-2 campaigns per week on top of automated flows.

Messages per Month	Avg Revenue per Subscriber	Unsubscribe Rate
2-4	$1.80	1.2%
4-6	$3.20	2.1%
6-8	$3.50	3.4%
8-10	$3.60	5.8%
10+	$3.40	9.1%

Source: Postscript 2025 Shopify SMS Benchmark Report

The revenue plateau hits around 6-8 messages while unsubscribes accelerate sharply. Most stores should send 4-6 per month. That includes:

• 1-2 campaign blasts (sales, product launches, restocks)
• Automated flows running in the background (welcome, cart, post-purchase)

The stores that over-send burn out their list within 3 months. We see it in every audit. A brand sends daily texts for a week during a sale, and their SMS list shrinks by 15-20%. That is months of list building undone in seven days.

Which SMS Marketing Platform Works Best for Shopify?

Your platform depends on your volume and market.

For Shopify stores, Postscript, Klaviyo SMS, and Attentive are the three leading SMS marketing platforms. Postscript is the most Shopify-native with the deepest integration, Klaviyo SMS unifies email and SMS in one platform, and Attentive has the strongest AI-driven personalization. For Southeast Asian stores, SMS costs are higher ($0.03-$0.08 per message in Malaysia) so ROI thresholds require tighter list management.

Platform	Best For	Starting Price	Shopify Integration	Key Strength
Postscript	Shopify-first brands	$25/mo + usage	Native (deepest)	Revenue attribution, compliance
Klaviyo SMS	Stores already on Klaviyo email	Included in Klaviyo plan	Native	Unified email + SMS flows
Attentive	High-volume DTC brands	$300/mo+	Native	AI segmentation, two-way messaging
Omnisend	Budget-conscious stores	$16/mo + usage	Native	Email + SMS + push in one
SMSBump (Yotpo)	Loyalty-focused brands	$19/mo + usage	Native	Loyalty program integration

Pricing as of 2025-2026

For Shopify stores in Malaysia and Singapore, there is an important consideration: SMS delivery costs in Southeast Asia are higher than in the US. A single SMS to a Malaysian number costs $0.03-$0.08 depending on provider and carrier, compared to $0.01-$0.02 in the US. This makes list hygiene and segmentation even more critical — you cannot afford to text unengaged subscribers.

Platform selection decision tree

Choose Postscript if you are all-in on Shopify and want the best revenue tracking. Their revenue attribution model is the most accurate in the space.

Choose Klaviyo SMS if you already run Klaviyo for email and want everything in one dashboard. The unified flow builder saves time on cross-channel orchestration.

Choose Attentive if you are doing $1M+ in revenue and need AI-powered send-time optimization and advanced segmentation.

How Do SMS and Email Work Together?

They are not competing channels. They are a system.

The highest-performing ecommerce brands run SMS and email as coordinated owned-media channels. Klaviyo's 2025 data shows that brands using both SMS and email generate 24% more owned-channel revenue than those using email alone. The coordination strategy is simple: email carries detail and education, SMS carries urgency and time-sensitive triggers.

If you have read our email automation breakdown, you know the 5-phase flow structure. SMS plugs into that same structure — but it does not replace it.

The coordination rules

Cart abandonment: SMS fires first (30-60 minutes), email follows (4-6 hours). If SMS converts, suppress the email. If email converts, suppress the SMS follow-up.

Product launches: Email announces the launch with details, imagery, and storytelling. SMS sends a 2-hour "doors close" reminder to the most engaged segment only.

Flash sales: SMS announces, email supports with more detail. For time-limited offers under 24 hours, SMS is primary. For longer sales, email leads.

Post-purchase: Email handles order confirmation, shipping details, and educational content. SMS handles delivery alerts and the quick review request.

The mistake we see most often: stores send the same message on both channels at the same time. That is not coordination. That is annoying the same person twice.

What Are the Compliance Rules for Ecommerce SMS?

Non-compliance is expensive. Both in fines and in trust.

Ecommerce SMS marketing requires explicit written consent (opt-in), clear identification of the sender, opt-out instructions in every message, and adherence to quiet hours. In the US, TCPA violations carry fines of $500-$1,500 per message. Malaysia's PDPA requires consent and provides for fines up to RM500,000. All major SMS platforms (Postscript, Klaviyo, Attentive) include built-in compliance tools.

Non-negotiable compliance checklist

1. Explicit opt-in. The subscriber must actively consent to receive SMS marketing. Pre-checked boxes do not count under most regulations.
2. Clear sender identification. Every message must identify your brand. "Your order from SkinGlow" not just "Your order."
3. Opt-out in every message. Include "Reply STOP to unsubscribe" or equivalent in every marketing message.
4. Quiet hours. Do not send between 9 PM and 8 AM in the recipient's timezone. Most platforms enforce this automatically.
5. Record-keeping. Store opt-in records (timestamp, source, consent language) for at least 4 years.

For Malaysian and Singaporean stores specifically: PDPA requires that you state the purpose of data collection at the point of opt-in, and you can only use the phone number for the stated purpose. If you collect a number for "order updates," you cannot use it for promotional SMS without separate consent.

Frequently Asked Questions

Is ecommerce SMS marketing worth it for small stores?

Ecommerce SMS marketing generates $36 in revenue for every $1 spent, according to Postscript's 2025 benchmark data from 18,000 Shopify stores. Even small stores with lists of 500-1,000 subscribers see meaningful returns because automated flows (welcome, abandoned cart, post-purchase) run continuously without manual effort. The key is starting with automated flows before adding campaigns.

How much does SMS marketing cost for Shopify?

Most Shopify SMS platforms start at $16-$25 per month plus per-message costs of $0.01-$0.05 in the US and $0.03-$0.08 in Southeast Asia. A store sending 5,000 messages per month to US subscribers would spend roughly $75-$100 total. Malaysian stores should budget 2-3x higher per-message costs and focus on tighter segmentation to maintain ROI.

Can you send SMS without consent in Malaysia?

No. Malaysia's Personal Data Protection Act (PDPA) requires explicit consent before sending commercial SMS messages. Violations carry fines up to RM500,000. Consent must specify the purpose (promotional messaging), and subscribers must be able to opt out at any time. All major SMS platforms include PDPA-compliant opt-in and opt-out tools.

What is a good SMS click-through rate for ecommerce?

A good SMS click-through rate for ecommerce is 19-36%, depending on message type. Automated flows (abandoned cart, welcome) typically achieve 25-36% CTR, while broadcast campaigns average 11-19%. These figures come from Attentive and Postscript's 2025 performance reports. Anything below 10% indicates a segmentation or messaging problem.

Should I use SMS or email for abandoned cart recovery?

Use both. SMS fires first at 30-60 minutes after abandonment, email follows at 4-6 hours. Omnisend's 2025 data shows this combination recovers 25% of abandoned carts, compared to 10-18% for SMS alone and 5-8% for email alone. Suppress follow-up messages on whichever channel converts first to avoid over-messaging.

Keep Reading

• The 5-Phase Email Automation System for Ecommerce
• How to Reduce Cart Abandonment on Shopify
• Shopify Malaysia: What You Need to Know