SMS Brandname & Zalo ZBS Messaging by OMICall – Reach Customers with a 95% Read Rate

Two messaging services — one platform

Pick the messaging channel that fits your needs

SMS Brandname delivers short, high-speed messages to 100% of mobile subscribers. Zalo ZBS carries rich content (logo, images, CTA buttons) for reaching customers in Vietnam. Combine both for the strongest omnichannel campaign.

Zalo

Zalo ZBS

Zalo Business Messaging (ZNS) — for reaching customers in Vietnam

2,000 free messages

Send notifications and customer-care messages over Zalo — recipients do not need to follow your OA first. Rich content (logo, banner image, CTA buttons) with two-way interaction, at 40% lower cost than other channels. Available for customers in Vietnam.

Sample Zalo ZBS rich content message on a phone

Rich content with logo, banner image and CTA buttons
No prior OA follow required from the recipient
Two-way interaction — customers can reply
API automation with CRM, website and mobile app
Read status tracked through the API
OTP format available, delivered in 15 seconds

SMS Brandname

Branded text messaging

SMS that shows your brand name instead of a phone number. Reaches 100% of SIM users — no internet needed. Ideal for OTP, critical notifications and promotions.

Brand name displayed instead of a phone number
Reaches 100% of SIM users, no internet required
15-second delivery — ideal for critical OTP
Targeting across 6 criteria (age, location, industry)
API integration with website, app, CRM and internal software
Real-time reporting on messages sent and delivered

Common use cases

6 scenarios you can deploy right away

Automate the whole messaging flow — from OTP verification to after-sales care, birthday wishes and promotions.

OTP verification

Send login and payment OTP codes — delivered in 15 seconds, highly secure.

Order confirmation

Notify customers when an order is confirmed, out for delivery and delivered.

Birthdays & rewards

Automatically send birthday wishes and vouchers to loyal customers.

Appointment reminders

Remind customers of medical, service and class appointments — 80% fewer no-shows.

Satisfaction surveys

Collect reviews after service — ZBS messages include a 1-5 star rating button.

Promotions & flash sales

Announce promotions to thousands of customers in minutes.

Why SMS Brandname + Zalo ZBS

Why businesses choose OMICall

OMICall (OMIJSC - ViHAT Group) is an official distributor of Zalo ZBS and eSMS — source pricing direct from Zalo and the carriers, with no middleman.

Proactive outreach

No prior OA follow needed — reach customers instantly using their phone number.

Reach 100% of customers

Zalo has 70M+ users in Vietnam and SMS reaches 100% of SIMs — full coverage of smartphone owners.

Enterprise-grade security

AES encryption and full compliance with Zalo and carrier rules. Safe for OTP and sensitive data.

Detailed measurement

See who received, read and clicked — real-time reporting through a two-way API.

40% lower cost

Pricing direct from Zalo and the carriers through OMICall — no middleman, 40% cheaper than email marketing.

Easy API integration

Standard REST API — connect your CRM, website, app or existing software in a day. SDKs for many languages.

Service pricing

Transparent pricing by message type

SMS Brandname is billed per message and per carrier. Zalo ZBS is billed only on successfully delivered messages. Volume purchases earn a discount.

Message type	Zalo ZBS	SMS Brandname
Notification / customer care Orders, confirmations, appointment reminders	Contact us Billed on messages delivered within 2 hours	From 290 VND / message · Varies by carrier: Viettel/Vina/MB
OTP verification Secure logins and payments	Contact us Delivered within 15 seconds	From 360 VND / message · High-speed priority route
Marketing / advertising Promotions, flash sales, customer care	Contact us Rich content with CTA support	From 450 VND / message · Advertising content surcharge applies
Free trial package For new customers	2,000 messages Free on your first sign-up	50 test messages Free Brandname testing
Brandname registration fee Brand name verification	Free OA registration & Brandname setup	From 1,000,000 VND One-time fee, varies by carrier

💡 Note: SMS rates vary by carrier and volume — orders above 100,000 messages per month qualify for a special discount. Contact our team for an exact quote based on your needs.

Technology & integration

A fully automated messaging system

Standard REST API, SDKs for many languages and a campaign dashboard — plug it into your existing software in a single day.

Full REST API

Integrate with your website, app, CRM or management software — SDKs for PHP, Node.js, Python, Java and .NET, with detailed API documentation.

ZBS template library

Hundreds of ready-made templates: order confirmations, reminders, 1-5 star ratings, vouchers. Approval takes just 1-3 days.

Scheduling & automation

Schedule sends in real time or trigger them by event (birthday, post-purchase, anniversary). Works with OMICall Workflow automation.

Real-time analytics dashboard

Track sent, delivered, read and click rates — export to CSV/Excel or connect Google Data Studio for deeper analysis.

Multi-channel messaging

Automatic fallback: send over Zalo ZBS first, then switch to SMS if unread. Ensures 99.9% of customers receive your message.

Targeting across 6 criteria

Filter by age, gender, location, industry and behaviour — as precise as Facebook Ads and Google Ads.

Frequently asked questions

Common questions about SMS Brandname and Zalo ZBS messaging services.

What is the difference between ZBS and ZNS?

ZBS (Zalo Business Service) is the new unified name for ZNS (Zalo Notification Service) after Zalo’s platform upgrade. They are the same service — notification and customer-care messages delivered over Zalo to customers in Vietnam, with no prior OA follow required. The end-user experience is identical; only the name in the official documentation changed.

Do customers need the Zalo app to receive ZBS messages?

Yes. ZBS is delivered inside the Zalo app, so the recipient must have Zalo installed. Zalo has more than 70 million users in Vietnam, which covers almost every smartphone owner there. For customers who do not use Zalo — and for audiences outside Vietnam — use SMS Brandname to guarantee 100% reach.

Does SMS Brandname show my company name on the customer’s phone?

Yes. Once registration is approved, your messages display your brand name (for example "OMICALL") instead of a phone number. That builds trust and makes your messages easy to recognise. Depending on the carrier, a Brandname is limited to 11 characters (unaccented letters and digits).

Can I message customers who have not followed my Zalo OA?

Yes — that is the key strength of ZBS. As long as your business owns a verified OA and has the customer’s phone number, you can message them directly on Zalo without any prior follow. These count as "notification messages", which Zalo permits provided the content serves a genuine customer-care or transactional purpose.

How long does registration and activation take?

ZBS: 1-3 business days for Zalo to approve the OA and activate the account. SMS Brandname: 5-10 business days, because registration runs through 3-4 carriers. While you wait, you can use a demo account to test the API and your templates.

How is messaging billed?

SMS Brandname: billed per message sent, ranging from 290 to 600 VND depending on the carrier and message type (customer care / OTP / advertising). ZBS: billed only on successfully delivered messages (within 2 hours or 15 seconds depending on the type). Volume orders above 100K messages per month earn a discount. Contact us for an exact quote.

Can it be integrated with my current CRM or software?

Yes. OMICall provides a standard REST API with SDKs for the most common languages: PHP, Node.js, Python, Java, .NET and Go. Connect your CRM, website, mobile app or ERP in one day. Full API documentation is available, plus 24/7 developer support.

Is customer data kept secure?

Yes. The platform uses strong AES encryption and all API calls run over HTTPS/TLS. OMICall does not store message content after delivery and never shares data with third parties. We comply with Vietnam’s Cybersecurity Law and with GDPR for international customers.

Bulk messaging over SMS and Zalo