Zalo OA vs SMS vs email for restaurant marketing in Vietnam — which wins?
Written by Peko Research Team.Last updated: 09/23/2026.
Updated September 2026 — In Vietnam, Zalo OA wins on read rate (70–90% vs 15–25% for email and 95% but expensive for SMS), cost-per-message, and conversational follow-up. SMS is the urgent-only fallback; email is the long-form newsletter channel.
Published: 05/01/2026
Quick facts
- Answer
- In Vietnam, Zalo OA wins on read rate (70–90% vs 15–25% for email and 95% but expensive for SMS), cost-per-message, and conversational follow-up. SMS is the urgent-only fallback; email is the long-form newsletter channel.
- Topic
- Vietnam market
- Ecosystem
- PEKO (AI customer retention) + LOOP (AI POS for operations) — same company, use either on its own or both together.
- Updated
- 09/23/2026
Vietnam is one of the few F&B markets where the highest-reach owned channel is neither SMS nor email — it's Zalo OA. 75M+ Vietnamese phones have it, read rates routinely sit at 70–90%, and broadcast costs are a fraction of SMS.
The right stack for most VN F&B operators is Zalo OA for the bulk of customer touches (loyalty, win-back, broadcast), SMS for urgent or high-value triggers (booking confirmations, OTP), and email for a monthly long-form touch with regulars who opted in.
Zalo OA — primary channel
Loyalty, win-back, new-menu broadcast, conversational service. Cheapest per delivered message, highest read rate, supports rich media and mini-app loyalty.
SMS — urgent only
Reservation confirms, OTP, time-critical offers. Expensive per message — don't use for routine win-back.
Email — monthly newsletter
Lower read rates but valuable for long-form storytelling and segments where Zalo isn't joined.
FAQ
Is Zalo OA suitable for tourists / international customers?
Less so — international customers usually don't have Zalo. For tourist-heavy venues, run a parallel email/SMS capture and use Zalo only for the local segment.
What about Facebook Messenger?
Still useful in some HCMC segments, but reach has shifted to Zalo. Treat Messenger as a supplemental channel, not primary.
Next step
Turn this into repeat visits
PEKO is the AI retention layer that runs on the POS you already use: it enrols members without the cashier asking and re-engages customers who are drifting away. Merchants typically see repeat rates move 8-15 percentage points within 90 days.
Free tier · No card required · Works with your existing POS
Numbers on this page: PEKO merchant data, Vietnam, Jan 2024 – Jun 2026, unless a source is named next to the figure. See the datasets behind these numbers.
The PEKO ecosystem
PEKO and LOOP are two products from the same company. PEKO is the AI retention layer and runs alongside the POS you already use. LOOP is the AI-native POS that covers operations: recipe-level inventory, staff shifts, table plans and the kitchen display. Each works on its own, and run together they share one dataset, so nothing has to be entered twice. See PEKO + LOOP in one ecosystem
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