What is Zalo OA (Official Account)? Why are Vietnamese business people using it?
If you are doing business in Vietnam, or your customers are in Vietnam, you will definitely come across Zalo OA (Zalo Official Account). It is similar to WeChat Official Accounts, but its penetration in the Vietnamese market far exceeds WeChat's in China—out of Vietnam's 100 million population, Zalo has over 75 million monthly active users.
Zalo is not just a chat app. Its Official Account (OA) system is the digital infrastructure of the entire Vietnamese business ecosystem: from customer service for small street shops to official accounts of VinGroup, from government notifications to influencer fan groups—everything runs on Zalo.
What is the difference between Zalo OA and WeChat Official Accounts?
| Feature | Zalo OA | WeChat Official Account |
|---|---|---|
| Mass Messaging | ✅ Unlimited (paid plans) | ✅ 4 times per month (Subscription Account) |
| Customer Service System | ✅ Built-in AI + human customer service | ⚠️ Requires third-party tools |
| Payment Function | ✅ Native ZaloPay integration | ✅ WeChat Pay |
| Verification Threshold | Low (business license required) | Medium to high (varies by category) |
| API Interface | ✅ Fully open | ✅ Fully open |
Three Core Features of Zalo OA
1. Broadcast Messaging
Zalo OA supports sending mass messages with images, text, videos, and files to all followers. Paid versions also offer targeted push notifications—precisely reaching users based on region, gender, and interest tags. Zalo official data shows that the average open rate for OA messages is 35-50%, far exceeding email and SMS.
2. Customer Service System (CS)
The Zalo OA backend integrates a complete customer service ticket system, supporting multiple simultaneous online agents, automatic assignment, and quick reply templates. In 2025, Zalo also launched an AI auto-reply feature that can connect to a business's knowledge base to automatically answer common questions.
3. ZaloPay Integration
OA can directly integrate ZaloPay for payments, allowing users to complete transactions without leaving the chat window. ZaloPay currently has over 40 million users in Vietnam, making it the second-largest mobile payment platform locally.
How to Register Zalo OA?
- Visit the Zalo OA website: Open the Zalo website at oa.zalo.me, click "Create Official Account"
- Fill in business information: Company name, business license photo, contact information
- Select account type: Business Account or Merchant Account
- Submit for review: Usually completed within 1-3 business days
- Complete your profile: Set up avatar, cover image, description, and auto-reply
Registration is completely free. If you need mass messaging and advanced features, you can upgrade to a paid plan.
Tips for Using Zalo Desktop Version
The Zalo desktop version (Windows/Mac) and web version can be logged in simultaneously, and the desktop version offers more features than the mobile version: supports drag-and-drop file sending (up to 1GB), OA management backend is only available on desktop, supports screenshot annotation before sending, and allows managing multiple OA accounts at once. If you manage Zalo OA, it is highly recommended to download the desktop version—it can boost work efficiency by more than three times.
Three Key Metrics for Zalo OA Management
- Follower Growth Rate: Drive traffic through QR codes, Zalo ads, and offline materials
- Message Engagement Rate: Reply and click rates within 24 hours after mass messaging
- Customer Service Response Time: Zalo OA publicly displays average response time, directly impacting brand image
Conclusion
If you want to enter the Vietnamese market, Zalo is an unavoidable entry point. Registering Zalo OA, downloading the Zalo desktop version, and setting up a customer service system—these three steps are the starting point for any business in Vietnam. With competition on Zalo OA still relatively low, the first-mover advantage is clear.