Zalo Blast Best May 2026

Zalo has strict anti-spam policies. You cannot scrape phone numbers and upload them. If users mark your messages as spam, your OA will be banned permanently.

Email open rates hover around 20-30%. SMS is often ignored. Zalo messages sit in the user's primary chat list. Because Vietnamese users check Zalo constantly (average 4+ hours per day), open rates for Zalo Blast regularly exceed 90%. zalo blast

Looking for a direct marketing channel with 90%+ open rates? Discover how Zalo Blast (Zalo OA) can help your business dominate customer engagement in Vietnam. Introduction: The App That Matters in Vietnam If you are doing business in Vietnam, there is one statistic you cannot ignore: over 75% of the country’s population uses Zalo. While the rest of the world argues over WhatsApp vs. Telegram, Vietnam has already decided. Zalo is the national messaging backbone. Zalo has strict anti-spam policies