There are two arguments about SMS marketing in 2026. The first, popular in conferences and LinkedIn posts, is that SMS is a relic — 160 characters of friction surrounded by spam, mistrusted by the consumer and ignored by the marketer. The second argument, popular in the spreadsheets of operators who actually run loyalty programmes for a living, is that SMS quietly delivers some of the highest ROI of any channel they have.
Both can be true. SMS is dead as a generic broadcast medium. It is alive — extraordinarily alive — as a precision channel for loyalty operators who understand how to use it.
Across Fundle's portfolio of 50+ active loyalty programmes in India, DLT-compliant transactional SMS delivers a median open rate of 96%, a click-through-equivalent (link short-URL hit) of 4-7%, and a cost per delivered message of ₹0.12-0.18. Promotional SMS, sent only to opted-in members, delivers a median 38% link CTR for offer-bearing messages. These numbers have been remarkably stable for 3 years.
The conventional wisdom is wrong about three things
1. SMS is not "broadcast"
The classical model — buy a 10 lakh-strong contact database, blast a 160-character offer, hope for redemptions — is dead. India's DLT (Distributed Ledger Technology) regulation has all but killed unsolicited blasting through cost, header registration and content-template approval. What remains, and what is thriving, is consented, member-bound SMS to a known database.
In loyalty, your members already opted in when they enrolled. The DLT framework actually protects this channel from the spam that ruined it ten years ago. Every approved template is auditable, every send is logged, and operators who use it correctly have an open rate channel that email, push and even WhatsApp struggle to match.
2. SMS is not "low information"
160 characters is enough to deliver a personalised offer, a unique single-use coupon code, a points balance update, a tier upgrade celebration, or a low-friction CTA URL. The constraint forces editorial discipline — and editorial discipline is what makes marketing work.
Compare: a 600-word email that 18% of recipients open and 1.2% click, versus a 90-character SMS that 95% of recipients open and 6% click. The SMS, despite being shorter, delivers 5-7× the effective reach for a fraction of the production cost.
3. SMS is not "old"
Two upgrades made SMS more capable than it has been in a decade. First, link short-URLs with branded domains carry tracking and dynamic content. Second, RCS Business Messaging (now live on Jio and Airtel networks in India) delivers a SMS-like inbox experience with rich cards, carousels, payments and verified-sender trust marks. SMS marketing in 2026 is closer to a chat surface than a 160-character box.
A framework: where SMS wins in a modern loyalty programme
Most operators waste SMS on the wrong use cases. The channel's real value emerges in a specific quadrant: high-urgency, low-creative, transactional or pseudo-transactional moments. Here is a working framework Fundle uses with new loyalty operators.
| Use case | SMS fit | Why |
|---|---|---|
| OTP / verification | ★★★★★ | Universal coverage, no opt-in friction, regulator-mandated transactional template. |
| Points credit / debit confirmation | ★★★★★ | Trust-building; members open to see balance. Reinforces programme value. |
| Tier upgrade celebration | ★★★★★ | Identity moment; high open + emotional resonance; short copy works. |
| Unique coupon delivery | ★★★★★ | Code + expiry + short URL. Better than email for time-bound offers. |
| Win-back / lapsed member | ★★★★ | Cuts through; one shot, one offer, one CTA. Use sparingly. |
| Newsletter / "what's new" | ★★ | Wrong channel. Use email or in-app inbox. |
| Long-form storytelling | ★ | Cannot do it. Don't try. |
| Visual catalogue browse | RCS only | Rich cards via RCS; falls back to SMS link otherwise. |
The five rules of SMS that actually works
Rule 1: Segment ruthlessly, send sparingly
Sending to your full base is the single worst thing you can do with SMS. It guarantees opt-outs, spam complaints and the kind of unsubscribe waves that take quarters to recover from. The right baseline: maximum 4 promotional sends per member per month, ideally fewer, always to a specific cohort with a specific job.
Most operators we work with reduce SMS volume by 60-70% in the first 90 days and increase incremental revenue by 30-40% in the same period. Less is, demonstrably, more.
Rule 2: Make every SMS member-specific
Generic SMS is dead; personalised SMS is alive. Personalisation is not just "Hi Priya". It is: balance ("You have 1,450 points"), recency ("Last visited Phoenix Marketcity on 14th Jan"), recommendation ("Hand-picked styles in your size") and unique coupons ("Use FUNDLE-7HKQ2 — yours only").
Send-time optimisation matters more in SMS than in any other channel because the read happens within 3 minutes 80% of the time. If your model picks a wrong hour, the message is read at the wrong moment and the offer expires unredeemed. AI send-time models lift redemption 20-30% on the same content.
Rule 3: Treat the URL as the asset, not the SMS
The 160 characters are the trigger. The branded short URL is where the experience happens — a microsite, a member-specific landing page, a one-tap redemption flow. Most operators waste budget on the trigger and starve the landing page. Reverse this.
Rule 4: Measure incrementality, not vanity metrics
Delivered, opened, clicked are vanity metrics. The only metric that matters for SMS in a loyalty programme is incremental revenue versus a control group. Modern loyalty platforms (Fundle and a handful of others) hold out a propensity-matched control automatically and report the delta. If your reporting cannot do this, your reporting is misleading you.
Rule 5: Build a graceful escalation
SMS should not be your only channel — and it should not be your default channel. Build an arbitration layer that picks SMS only when WhatsApp delivery is unconfirmed, push is unopened, or the message is time-critical. The right architecture treats SMS as the "guaranteed delivery" fallback that closes the gap when other channels can't reach the member.
Where this is going: SMS → RCS → conversational commerce
RCS Business Messaging is the natural next layer. Where SMS gives you 160 characters, RCS gives you a rich card with images, buttons, payments and verified-sender trust marks — delivered to the native messaging inbox on Jio and Airtel handsets. Fundle's deployments show RCS lifting CTR 3-4× versus the same SMS content, with full graceful fallback to plain SMS for unsupported handsets.
The strategic implication: build your SMS programme today as if RCS is a year away from being your default. Templates, segmentation, send-time, attribution — these all carry over. Operators who treat SMS as a relic miss the lift; operators who treat it as the chassis under RCS compound the advantage.
Cost economics that justify the channel
At ₹0.12-0.18 per delivered SMS and 6-15% redemption on member-specific offers, the maths is unforgiving — even at modest basket sizes, blended ROI runs 8-25× across the categories we see. Compare to paid social at 0.5-1.5× blended ROI for the same audience, and the channel rebalancing is obvious.
SMS economics break the moment you forget rule 1. Send carelessly, and opt-outs erode the asset within 90 days. Spam complaints get your DLT headers downgraded, deliverability drops, and your future SMS costs go up. This channel only works for operators who respect the member.
What to do this quarter
- Audit your last 90 days of SMS sends. For each, ask: was this sent to a specific cohort, with a specific job, and a specific CTA? If not, kill it.
- Move to DLT-compliant templates if you have not. Register Service Implicit and Service Explicit categories separately so promotional/transactional balance is clean.
- Wire your loyalty platform's send-time model into SMS. If it doesn't have one, you are leaving 20-30% redemption on the table.
- Set up RCS Business Messaging through your BSP (Fundle is Meta-approved on WhatsApp + RCS-capable). Test on Jio and Airtel handsets.
- Replace one weekly batch email with one weekly precision SMS journey, segmented to the top 3 cohorts that matter to revenue. Measure incremental revenue for 90 days.
See SMS economics in your own data
Fundle runs a 30-day pilot that connects your loyalty database, runs SMS + RCS journeys, and reports incremental revenue against a propensity-matched control. No commitment.
FAQs
Is SMS being replaced by WhatsApp in India?
No — they serve different jobs. WhatsApp wins for conversation, rich media and two-way commerce. SMS wins for guaranteed delivery, transactional triggers and audience segments without WhatsApp. The right architecture orchestrates both, with AI arbitration picking the channel per member, per moment.
What about DND? Can I still send promotional SMS?
Yes — to members who opted in to your loyalty programme, where promotional consent is captured at enrolment. DLT framework requires registered headers and approved templates; both are managed by your BSP. DND restriction applies to cold/purchased databases, not consented loyalty members.
How do I prevent opt-outs from eroding the base?
Cap sends at 4 promotional / member / month. Track unsubscribe rate per campaign — anything above 0.5% is a signal the campaign was wrong (audience or message). Investigate, don't paper over with more volume.
What is the typical ROI an operator should expect?
Across categories, well-run SMS journeys deliver 8-25× blended ROI on a 90-day incremental-revenue basis. Categories with high frequency (grocery, pharmacy, F&B) tend to over-index; low-frequency categories (jewellery, electronics, furniture) under-index unless paired with occasion-based triggers.