What It Is, How It Works + 10 Examples

In ecommerce, an SMS flow is an automated sequence of text messages triggered by customer behavior.

The best thing about it is that you can set and forget (at least for a while). If a customer leaves items in their cart, the flow waits for 30 minutes of inactivity and then automatically sends a reminder to complete the purchase. Or, it could be a winback sequence that sends a message to someone who hasn’t engaged with you in 60 days.

In this guide, I’ll show you exactly how to set up profitable flows, complete with message templates and strategies from top ecommerce brands.

What is an SMS flow?

An SMS flow is a sequence of automated text messages sent to a customer based on their shopping behavior, like browsing a product, abandoning a cart, or completing a purchase. Each flow has a trigger (the action that starts it), optional delays between messages, and branching logic that changes what gets sent next based on what the customer does.

Once set up, the flow runs on its own and doesn’t require any manual sending, time-tracking, or anything else. You’ll need to review it from time to time to optimize it, and that’s all.

Other terms for an SMS flow include SMS automations, triggered SMS marketing campaigns, and SMS drip campaigns. The concept is the same either way.

The most common triggers for SMS flows include:

Are automated SMS flows effective?

If you’re wondering how effective automated SMS flows actually are, our 2025 data makes it clear: they consistently crush one-off broadcast campaigns.

Here’s how automated texts compare to manual sends:

• Revenue: They generate $0.74 per send versus $0.15 for manual campaigns, which is nearly a 5x difference
• Engagement: Automations achieve a 20.32% click-to-sent rate, beating the 12.38% standard campaign average
• Conversion: They deliver a 0.77% overall conversion rate (vs. 0.12%) and a 3.81% click-to-conversion rate (vs. 0.97%)

Some triggers do even better than the averages above. Abandoned cart texts convert anywhere from 3.7% to 10.2%, and back-in-stock alerts land between 6.0% and 14.3%. That’s not luck. You aren’t just shooting into the dark when someone might want a promotion. Their own behavior tells you when they’re ready to buy.

How SMS flows work

An SMS flow has four components that work together:

1. Trigger: The event that starts the flow. A customer subscribes, adds to cart, completes a purchase, or views a product page.
2. Delays: The waiting periods between messages. You might wait 30 minutes before a cart reminder, then 24 hours before a follow-up.
3. Messages: The SMS or MMS message sent at each step. Make sure each SMS aims to achieve one task, be it to confirm an order, recover a cart, or request a review.
4. Conditional splits: Logic that sends customers down different paths based on what they do (or don’t do). If they purchased before, they may go on another path; if this is their first purchase, they may go on another.

10 SMS flows every ecommerce brand should use

These SMS flows are the absolute foundation of any successful ecommerce SMS marketing strategy. Each flow focuses on specific actions that customers take and can generate revenue when used effectively.

I’ll now go through each SMS flow and show you how to successfully set them up.

1. Welcome series

Trigger: New subscriber joins your SMS list through signup forms or checkout

Audience: First-time subscribers who haven’t purchased from your store yet

Goal: Encourage the first purchase and set clear expectations for future communications

Recommended timing:

• The first message is sent five minutes after signup
• A second message follows 24 hours later
• A third message arrives 72 hours after the signup

This flow turns ecommerce SMS lead generation efforts into actual sales while introducing new subscribers to your brand.

SMS example template:

2. Browse abandonment

Trigger: Customer views a product page but doesn’t add anything to their cart

Audience: Shoppers who showed purchase intent but didn’t take the next step

Goal: Re-engage potential customers and encourage them to go further down the sales funnel

Recommended timing:

• The first message is sent two hours after viewing a page
• A second message follows 24 hours later if no action is taken

A browse abandonment SMS flow works well for higher-priced items where customers need time to decide.

SMS example template:

3. Cart abandonment

Trigger: Customer adds items to the cart but doesn’t complete the checkout process

Audience: High-intent shoppers who are one step away from making a purchase

Goal: Recover lost revenue from customers who already showed strong buying signals

Recommended timing:

• The first message is sent 30 minutes after abandonment
• A second message follows 24 hours later
• Another message arrives 72 hours after initial abandonment

A cart abandonment SMS flow offers the opportunity to convert the most. These customers have already decided they want your products.

SMS example template:

4. Order confirmation

Trigger: Customer successfully made a purchase

Audience: All customers who just bought something from your store

Goal: Immediately reassure and build trust during post-purchase moments

Recommended timing: Immediately after the purchase is processed and completed

Include details like order number, delivery ETA, and customer service contact information.

SMS example template:

5. Shipping confirmation

Trigger: The order status has changed to “shipped”

Audience: Customers who have their orders in transit

Goal: Provide tracking information and reduce unnecessary support workload

Recommended timing: Right after the product has shipped from your warehouse

Include tracking numbers and estimated delivery dates when available.

SMS example template:

6. Post-purchase/review request

Trigger: Depends on your product, but generally speaking, a few days to a couple of weeks after the order has been delivered

Audience: Customers who recently received their orders and had time to test the product

Goal: Get genuine social proof through reviews and create opportunities for more sales

Recommended timing: Three to five days after the estimated delivery date (or a week or two if your product warrants it)

Offer incentives like discount codes to increase response rates.

SMS example template:

7. Winback

Trigger: Customer hasn’t purchased in a defined period (typically 60–90 days)

Audience: Customers who have become inactive or dormant

Goal: Engage inactive customers who used to buy from you in the past to see if they still want to receive content from you or buy from you

Recommended timing: 60 days after the last purchase date

Use exclusive offers or showcase what they’ve missed while they were away

SMS example template:

8. Back-in-stock

Trigger: Customer subscribes to notifications for out-of-stock products

Audience: Interested shoppers who specifically requested updates on product availability

Goal: Notify the recipient that the item they wanted is now available again

Recommended timing: Immediately once the product becomes available again

Emphasize limited quantities to encourage immediate action.

SMS example template:

9. Replenishment reminder

Trigger: Based on how long the product usually lasts

Audience: Customers who purchased consumable goods that need regular restocking

Goal: Remind customers to reorder products before they run out, and before they find a competitor.

Recommended timing: Depends on product type (for example, 30 days for skincare and 90 days for supplements)

A replenishment SMS flow works exceptionally well for consumable products like supplements, skincare, or pet food.

SMS example template:

10. Birthday/anniversary

Trigger: Customer’s birthday or account anniversary date arrives

Audience: Customers celebrating personal milestones or account anniversaries with your brand

Goal: Build brand loyalty and drive sales with personalized, celebratory offers

Recommended timing: On the birthday or anniversary date

Make the offer exclusive to the customer on their special day.

SMS example template:

SMS flow compliance: consent, opt-in, and what “subscribed” means

Every SMS flow only fires for subscribers who have explicitly opted in. In the US, the TCPA requires prior express written consent, and violations cost $500 to $1,500 per message. TCPA litigation filings rose 95% in 2025, so keeping your list compliant is not optional.

• Single opt-in: A customer submits their number and is immediately added to your list.
• Double opt-in: A customer submits their number, then confirms by replying “YES” before being added.

Every message must also include a working opt-out option. Omnisend processes these opt-outs instantly to keep your list clean.

How to build your first SMS flow in Omnisend

Building your first SMS flow is easy when you follow these proven steps. With a platform like Omnisend, the process is intuitive, as you’ll have access to powerful automation features that drive results.

Step 1: Choose a pre-built workflow or start from scratch

I appreciate Omnisend’s extensive library of pre-built automation sequences for common ecommerce scenarios.

These templates include cart abandonment, birthday campaigns, welcome series, and more, reducing setup time significantly. You can customize any template to match your brand voice and specific business needs.

Alternatively, you can build a custom SMS workflow from scratch. This option works well when you have unique business requirements or want to test new SMS automation ideas.

Step 2: Add an SMS block to your workflow

The drag-and-drop workflow builder lets you add SMS or MMS messages anywhere in your automation sequence. Simply drag an SMS block from the toolbar and drop it where you want the message to go.

You can combine SMS with email and push notifications in the same workflow for maximum impact.

I like how the visual interface clearly defines how your automation will flow from one step to the next. You’ll see exactly when each message is sent and how different customer actions affect the sequence.

Step 3: Write your message and add personalization

You can create your SMS content using the built-in message editor. 

Insert dynamic personalization tags like {first_name} to make your messages feel personal.

You can also include product-specific tags like {abandoned_cart_url} or {product_name} to create highly targeted content.

Personalization significantly improves SMS performance because customers respond better to messages that apply to their situation.

Step 4: Configure your channel settings for compliance

Navigate to the Workflow Channel Settings to ensure legal compliance with SMS regulations.

Choose Subscribed for marketing SMS flows to send only to customers who opted in. Select the Any subscription status exclusively for transactional messages, such as order confirmations that every customer needs to receive.

This step prevents SMS compliance violations while ensuring your messages reach the right audiences.

Step 5: Test and activate your SMS flow

Send test messages to yourself before making the flow live. Check that all personalization tags populate correctly and that links work as expected. Review the message formatting on different phone types to ensure that it reads well.

After confirming that everything works properly, you can activate your SMS flow. The automation will start running immediately and continue working around the clock without additional intervention from your team.

The four SMS flows to launch first

• Welcome flow: Deliver the promised incentive immediately; introduce the brand and top products
• Abandoned cart flow: Send 2–3 messages with a timely reminder and a direct cart link
• Post-purchase flow: Thank the buyer to reduce buyer’s remorse, and recommend complementary products if applicable
• Replenishment flow: Remind customers to reorder consumables, especially effective for beauty, health, food, and pet brands
• Shipping and fulfillment updates: Send transactional texts that confirm shipping and delivery so your support team doesn’t get overwhelmed with support tickets

How to measure SMS flow performance

When measuring SMS flow performance, focus on business-critical metrics that tie directly to revenue:

• Click-through rate: The percentage of recipients who clicked a link, which shows how compelling and relevant your message is
• Conversion rate: The percentage of people who purchased after clicking, which reveals the flows that actually generate sales
• Revenue per recipient: The average revenue from each SMS recipient, which combines your conversion rate and order value to show this metric
• Unsubscribe rate: The percentage of people who opted out, which can signal either too-frequent sending or irrelevant content

Here’s an example of the intuitive visual presentation of an SMS channel dashboard on Omnisend:

Frequently asked questions about SMS flows

What are SMS flows?

SMS flows are automated text message sequences that are sent based on customer actions or time intervals. They help ecommerce businesses deliver relevant messages at the right moments without manual sending. Common examples include welcome messages, cart reminders, and order confirmations.

What is the best time of day to send an SMS flow message?

Most SMS flows perform best when sent between 10 AM and 8 PM in your customer’s local time zone. Avoid texting before 9 AM and after 9 PM to avoid disturbing your customers. Test different send times to discover what works for your specific audience.

Can I use SMS flows for transactional messages globally?

Transactional SMS messages, such as order confirmations and shipping updates, can be sent globally. Marketing SMS flows, however, face different regulations that vary by country/region. It’s in your best interest to check local SMS compliance requirements before launching promotional campaigns in international markets.

Should I use SMS or MMS in my flows?

SMS works better for most ecommerce flows. It’s more reliable and costs less per message. MMS earns its place when you already know product images or other visuals drive conversions for your brand. We recommend starting with SMS, then running an A/B test to see if MMS pulls ahead.

What’s the difference between an SMS flow and an SMS campaign?

An SMS campaign is a message you schedule yourself and send to your whole list at once, like a promo for a weekend sale. An SMS flow is triggered by a customer’s actions. When someone abandons a cart or joins your list, the message goes out automatically. Moreover, flows tend to outperform campaigns because they reach people at the moment they’re most likely to act.