SMS marketing still feels like a cheat code.
Open rates are high, responses are fast, and revenue can be immediate.
Which is exactly why so many brands ruin it.
2026 is not the year for "blast and pray."
If you want SMS to work, you need to get six things right:
- List growth
- Consent
- Timing
- Tone
- Frequency
- Omnichannel integration
1. List growth: Stop chasing volume
Most brands get this wrong from day one.
They focus on growing the biggest list possible. Wrong goal.
You want the right list, not the biggest one.
SMS is not forgiving. If someone doesn't want your messages, they won't ignore you. They'll block you.
What works:
- Collect opt-ins across multiple channels (site, checkout, QR codes, in-store)
- Be clear about what people are signing up for
- Offer real value, not just "get updates"
- Keep the barrier low, but the intent high
What doesn't:
- Pre-ticked boxes
- Sneaky opt-ins
- Importing numbers from other channels
A smaller, engaged SMS list will outperform a large, cold one every time.
2. Consent: This isn't optional
This is where most brands get burned, and not just on performance. There's a legal dimension too.
In most markets, including South Africa under POPIA, you need explicit opt-in consent before sending marketing SMS messages. [SMSFlow]
No consent, no sending.
The rules are getting stricter:
- Consent must be clear and specific
- You can't share consent across brands
- People must be able to opt out easily
- Opt-out requests must be honoured immediately, even outside the standard "STOP" keyword
What good looks like:
- Double opt-in for higher intent
- Clear disclosure of message frequency
- Obvious opt-out instructions in every message
Consent isn't a checkbox. It's the foundation of your entire SMS strategy.
3. Timing: The make-or-break factor
SMS is intrusive by nature. That's why timing matters more here than on any other channel.
Get it right and you get a response. Get it wrong and you get blocked.
Basic rules:
- Respect quiet hours (treat SMS like a phone call)
- Don't over-message
- Don't stack messages too close together
What actually works: event-driven messaging
- Cart abandonment
- Delivery updates
- Appointment reminders
- Back-in-stock alerts
These work because they're expected and relevant.
What doesn't:
- Random promotional blasts
- "Just checking in" messages
- Daily offers with no context
SMS works best when it feels like a service, not a campaign.
4. Tone: You're in their pocket
This is where most brands completely miss the mark.
They take their email copy and squeeze it into 160 characters. Bad move. SMS is not email. It's closer to a conversation.
Best practice:
- Keep it short and direct [Barn2]
- Sound human
- Make one clear ask
- Add value immediately
Example:
Weaker: "Don't miss out on our exclusive limited-time offer..."
Stronger: "Hey Sarah, your cart's still waiting. Want 10% off to finish it?"
Big difference.
5. Frequency: The silent killer
You don't usually lose subscribers because of one bad message. You lose them because of too many messages.
Watch your signals:
- Rising opt-outs
- Falling engagement
- Complaints
These are not normal. They're warnings.
If your SMS strategy relies on volume alone, it's already broken.
6. SMS works best with other channels
SMS is powerful, but it shouldn't work alone.
The best-performing brands pair SMS with:
- Paid media
SMS becomes the nudge, not the entire strategy.
Email gives you depth. SMS gives you urgency.
Final thought
SMS is not a volume game. It's a trust channel.
Trust is easy to lose and hard to win back.
Before you send your next campaign, ask:
- Did they actually ask to hear from us?
- Is this message useful right now?
- Would I be okay receiving this?
If the answer is no, don't send it.
Frequently asked questions
- How often should I send SMS marketing messages?
- There's no universal number, but rising opt-outs and falling engagement are clear signs you're sending too often. Event-driven messages (cart abandonment, delivery updates, reminders) perform better than a fixed broadcast schedule because they're relevant when they arrive.
- Do I need explicit consent to send SMS marketing in South Africa?
- Yes. Under POPIA, you need explicit opt-in consent before sending marketing SMS messages. Pre-ticked boxes don't qualify. Consent must be specific, and recipients must be able to opt out easily at any time.
- What's the best time of day to send an SMS campaign?
- Treat SMS like a phone call. Avoid early mornings, late evenings, and weekends unless your audience has explicitly opted in for those windows. For transactional messages like delivery updates, send when the trigger fires.
- Should SMS replace email in my marketing mix?
- No. They serve different roles. Email is better for depth, context, and longer content. SMS works for urgency and quick action. Brands that pair the two, alongside WhatsApp where relevant, consistently outperform those relying on a single channel.