Is the legal risk here actually as serious as this page makes it sound?

**Yes, and it is worth taking seriously rather than dismissing as boilerplate caution.** TCPA statutory damages are $500-$1,500 per message with no cap, enforced through private class actions, not just regulator fines. Plaintiffs' firms actively target ecommerce brands with weak checkout consent language or slow opt-out processing, and there is no minimum size that makes a brand too small to be a target. **The good news:** the actual fix is mechanical, not mysterious. Get the opt-in checkbox language right (unchecked, full disclosure, double opt-in), register for 10DLC, and process opt-outs within 10 business days. Brands that do these three things correctly are not the ones getting demand letters.

How is this different from the WhatsApp channels tactic on this platform?

**Different regulatory regime, different economics, different primary audience.** SMS here means carrier text over the US phone network (10DLC or short codes), governed by TCPA and state mini-TCPAs, with per-message carrier costs and dominant in US/global ecommerce lifecycle marketing. WhatsApp channels means OTT broadcast messaging inside Meta's app, priced per-conversation rather than per-message, dominant in India, LATAM, and parts of Europe, and carrying no TCPA exposure. If most of your audience is outside the US and already on WhatsApp, that is a separate tactic worth evaluating on its own, do not run both under this playbook.

I'm a B2B SaaS founder, should I bother with this?

**Honestly, probably not, at least not yet.** This tactic is built around ecommerce lifecycle triggers, cart abandonment, back-in-stock, post-purchase, none of which map cleanly onto a B2B sales cycle. If you have no checkout and no product catalogue, there is very little for SMS to trigger on, and the compliance overhead is the same regardless of how small your use case is. If you are B2C or ecommerce, or you run a service business with appointment reminders and simple transactional texts, this tactic fits well. Otherwise, put the time into your email lifecycle instead.

Do I really need to register for 10DLC if I'm a small store just starting out?

**Yes, regardless of size.** 10DLC registration is a carrier-level requirement, not a scale threshold. Unregistered A2P traffic gets filtered or blocked by carriers, often silently, so your first campaigns can look like they flopped when they simply never delivered. Every platform in this tactic (Postscript, Klaviyo, Attentive, SimpleTexting) handles the registration paperwork for you, it just takes a few business days for approval, so start it in week one, not after your list has grown.

What's a realistic starting budget?

**$50-300 a month to start**, scaling with list size and send volume. That covers your platform fee plus per-message costs (roughly $0.01-0.03 for SMS, more for MMS, plus carrier fees). This is low relative to paid acquisition channels, but it is not free like organic content, every message has a marginal cost, which is exactly why unsegmented, unlimited broadcasting is a bad idea even before you factor in unsubscribe risk.

How often can I message my list before people start unsubscribing?

**Cap broadcasts at 4-8 per month, and always segment.** Triggered flows (welcome, cart, back-in-stock) do not count against this cap, since they fire on individual behaviour rather than blasting the whole list. Watch unsubscribe rate per send as your real ceiling: if it trends above roughly 0.5-1% on a given campaign, you are either sending too often or to the wrong segment. Unsubscribes are permanent, so this number compounds against you over time far more than a single bad open rate ever would.

📱 Owned Lifecycle Channel

SMS & Text Marketing

Build an owned SMS channel for ecommerce lifecycle marketing: welcome flows, abandoned-cart triggers, back-in-stock alerts, and segmented broadcasts, all wired to product and purchase behaviour rather than a content calendar. Consent and carrier compliance (TCPA, 10DLC) are not optional extras here, they are the first thing you set up.

15 min read

Last updated: Jul 26, 2026

💬

"Switching to a dedicated SMS platform lifted our SMS conversion by 541% and got us to our revenue goal in about six weeks, once the welcome and cart-recovery flows were actually live."

CHOMPS, via Postscript case study

📅 Your First 60 Days

Setup Warm-up Outreach

Week 1

Pick a platform, start 10DLC registration

⏱ ~3 hours

Week 2

Build compliant opt-in capture (popup, checkout, keyword)

⏱ ~4 hours

Week 3-4

Launch welcome, cart, and back-in-stock flows

⏱ ~6 hours

Month 2

Segment list, start monthly broadcast campaigns

⏱ ~2 hours/week

Ongoing

Monitor unsubscribe rate, process opt-outs, audit consent

⏱ ~1 hour/week

Week 1

Pick a platform, start 10DLC registration

⏱ ~3 hours

Week 2

Build compliant opt-in capture (popup, checkout, keyword)

⏱ ~4 hours

Week 3-4

Launch welcome, cart, and back-in-stock flows

⏱ ~6 hours

Month 2

Segment list, start monthly broadcast campaigns

⏱ ~2 hours/week

Ongoing

Monitor unsubscribe rate, process opt-outs, audit consent

⏱ ~1 hour/week

Is this for you?

Great fit if...

You run an ecommerce or B2C store with a checkout and a product catalogue (cart, browse, and stock events give SMS something to trigger on)
You already have, or can quickly build, an email list or storefront traffic to capture phone numbers from
You are on Shopify or a platform with a mature SMS integration (Postscript, Klaviyo, Attentive, SMSBump)
You are willing to do the compliance work properly (10DLC registration, disclosure language, consent records) before sending a single message
You can commit to a real welcome and cart-recovery flow, not just occasional broadcast blasts

Try something else if...

You are a B2B SaaS company with no ecommerce checkout, this channel has almost nothing to trigger on and low relevance for your buyers
You are pre-launch with zero customers or list, there is no consent base and no lifecycle event to send against yet
You are looking at this as a cheap way to "blast the list" more often than email, that is exactly the pattern that burns lists and invites TCPA complaints
You cannot commit real time to consent hygiene and opt-out processing, a badly run SMS programme is a bigger legal liability than most other tactics on this platform
You need a broadcast-messaging channel for an audience outside the US on WhatsApp or a similar OTT app, that is a different tactic with different economics and no TCPA exposure

Build the same lifecycle logic in email first →

Not the right fit?

If SMS & Text Marketing doesn't match your situation, consider these alternative tactics that achieve similar goals:

Email Newsletters

Build and nurture an email list with regular, valuable content.

beginner•low•medium term

What to expect

2-4 weeks

To first automation revenue, once a list and checkout already exist

$0.01-0.03

Cost per SMS sent (before carrier fees), MMS runs higher

<1%

Healthy unsubscribe rate per broadcast send, the number to watch, not opens

Quick math: SMS pays back fast on triggered flows (welcome, cart, back-in-stock) because those messages ride existing product intent. It pays back slowly, or not at all, if you are starting from zero subscribers or have no repeat-purchase behaviour to trigger on. Treat the first month as list-building and compliance setup, not revenue.

Do not collect a single phone number before this step is done. SMS platforms are not interchangeable the way email tools are, your choice depends on where your store already lives. And every platform requires you to register with carriers before they will let your traffic through cleanly.

Match the platform to your stack

Pick one, do not evaluate all five, the differences matter less than actually starting.

Shopify store, want SMS and email in one profile: Klaviyo SMS, since it shares consent and customer data with the email side you likely already use
Shopify store, want an SMS-first tool built for cart recovery: Postscript, purpose-built for Shopify with strong compliance tooling baked in
Enterprise or omnichannel brand (multiple storefronts, large list): Attentive, custom enterprise pricing but the deepest AI send and compliance tooling
Service business or non-Shopify store, mainly broadcasts and two-way replies: SimpleTexting, no ecommerce flows but simple and cheap to start
Already using Yotpo for reviews or loyalty: Yotpo SMS & Email (formerly SMSBump), bundles cleanly into that stack

Why the platform choice compounds later:

📈 CHOMPS saw a 541% lift in SMS conversion after moving to a Shopify-native platform (Postscript)📈 True Classic got a 3x higher opt-in rate and 40% more automation revenue on the same switch

10DLC (10-digit long code) is the US carrier system for business texting from a regular-looking phone number. Unregistered numbers get filtered or silently blocked by carriers, your messages simply stop arriving and you will not always get an error telling you why.

Start the 10DLC campaign registration through your SMS platform (Postscript, Klaviyo, Attentive, and SimpleTexting all handle the paperwork via The Campaign Registry on your behalf), do not try to register directly unless your platform tells you to
Provide accurate business details (legal entity name, EIN/tax ID, website, use case category) exactly as they appear on official records, mismatches are the top cause of registration delays
Select the correct campaign use case (e.g. "Marketing" or "Mixed") since carriers throttle mis-categorised traffic even after approval
Wait for approval before sending real campaigns, this typically takes a few business days, do not treat the waiting period as optional
Keep the registered number as your only sending number, switching numbers later means re-registering and re-training your list

⚠️ Skipping 10DLC does not save time

Unregistered A2P (application-to-person) traffic gets filtered by carriers, often silently. You will see messages marked "sent" in your platform dashboard while a meaningful share never reach a phone. This is the single most common reason a brand's first SMS campaign looks like it flopped, it never actually delivered.

ℹ️ Why carrier text needs registration and WhatsApp does not

This tactic covers carrier SMS/MMS over the US phone network (10DLC or short codes), which sits inside the TCPA legal regime and the carrier registration system. If your audience is mostly outside the US and you are considering OTT broadcast messaging over an app like WhatsApp instead, that is a different tactic with a different pricing model (Meta's per-conversation pricing) and none of the TCPA exposure. Do not run both under the same playbook.