ITG GLOBAL SCREENING

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By Admin April 20, 2026

How to Use Zalo's Active User Filter? Instantly Filter Out "Zombie" Accounts to Boost Reach Rates for Mass Messaging in Vietnam.

Zalo, a national-level social platform in Vietnam, is a core tool for companies expanding into the Vietnamese market. However, many companies experience low reach rates and a proliferation of inactive accounts when sending mass messages, primarily due to a lack of understanding of Zalo's active user filtering methods. Zalo's active user filtering is key to solving these problems. By identifying account activity levels and eliminating inactive accounts, companies can improve mass message reach, save costs, and increase ROI, helping them accurately reach active users and efficiently penetrate the Vietnamese market.

I. Why is Zalo's active filtering the key to improving the reach of mass messaging in Vietnam?

Many businesses have invested significant effort in mass messaging on Zalo Vietnam but have seen poor results. Inaccurate targeting can lead to the following problems:
  • Invalid outreach: Accounts that have not been logged in or activated for a long time cannot reach real users when sending mass messages.
  • Low response rate: Reaching zombie accounts and inactive accounts with no interactive behavior.
  • Wasted resources: Operational efforts are spent on ineffective accounts, and mass messaging has low cost-effectiveness.
  • Inefficient: Zombie accounts dilute effective reach and lower the overall mass messaging effectiveness.
The core of marketing is "precise reach." Zalo's active filtering = eliminating inactive accounts + focusing on active users, which is the foundation for improving Zalo's mass messaging reach in Vietnam and seizing the Vietnamese market.

II. Zalo Active Account Screening: Basic Active Account Identification Techniques

The first step in Zalo's active account screening is basic account identification, which quickly filters out low-quality accounts. The key points are as follows:
  • Activity filtering: Lock in accounts with interaction within the past 7 days, and remove inactive accounts that have been inactive for more than 30 days.
  • Authenticity screening: Accounts with complete information and profile pictures/posts are retained; accounts with blank or no posts are filtered out.
  • Interaction filtering: Select accounts that reply to messages, like, and share, and exclude low-quality accounts with zero interaction.
  • Status filtering: Remove accounts with abnormal status or limited functionality to ensure messages are delivered normally.
Zalo's basic active filtering is easy to implement and can quickly eliminate more than 60% of low-quality accounts, improving the quality of mass-mailing accounts and paving the way for precise targeting.

III. Zalo Active User Filtering: Dimensions for Precisely Targeting Vietnamese Users

Simply screening for active accounts is insufficient; it's necessary to conduct Zalo activity screening tailored to the specific characteristics of the Vietnamese market to identify high-value users. Specific dimensions include:
  • Regional filtering: Focusing on core areas such as Hanoi and Ho Chi Minh City, accounts outside the target region are excluded.
  • Interest filtering: Match product-related tags to filter users with potential needs.
  • Behavioral filtering: Filter users with high intent to purchase similar products or browse similar products.
  • Time-based filtering: Based on peak user activity in Vietnam, filter users who are active during the corresponding time period.
Combining Zalo's active filtering in the Vietnamese market can improve the accuracy of mass messaging, further increasing reach and response rates.

IV. Zalo Active Screening: Achieving Deep Refinement Through Linkage with ITG's Global Screening

After basic screening, a dual closed loop of active Zalo screening is created by linking with ITG's overall screening to completely eliminate zombie accounts. The specific operation is as follows:
  • Batch verification: Quickly detect account activity and authenticity, accurately identify zombie accounts and inactive accounts.
  • Multi-dimensional filtering: Combining multiple dimensions to target highly active and highly interested users in Vietnam.
  • Increased efficiency: Replaces manual batch screening, saving operating time and labor costs.
  • Data optimization: Relying on tool data, reverse-engineering Zalo's active user filtering rules.
ITG Global Filtering is a powerful aid to Zalo's active filtering, making up for the platform's filtering limitations, improving the accuracy of account purification, and eliminating the problem of zombie accounts.

V. Zalo Active User Screening: Key Points for Implementation and Optimization

Zalo's active filtering needs to be optimized in practice to improve the long-term reach of mass messaging. The key points are as follows:
  • Step-by-step screening: First, identify active accounts; then, pinpoint specific targets; and finally, refine the results using advanced tools.
  • Small-scale testing: First verify the effect with a small batch, then expand the scale of mass messaging.
  • Data Review: Adjusting Zalo's Activity Screening Criteria Based on Reach and Response Data
  • Continuous iteration: Update Zalo's active user filtering dimensions based on market and user changes.
Optimizing the implementation allows Zalo's active filtering to reach its full potential. Combined with ITG's comprehensive filtering, it can reliably capture highly active users in Vietnam and improve conversion efficiency.

The core reason for the low reach of Zalo's mass messaging in Vietnam is the ineffective use of Zalo's activity filtering system. A complete Zalo activity filtering system, combined with ITG's comprehensive filtering and deep purification, can filter inactive accounts with one click, improve reach, and help companies expanding overseas to enter the Vietnamese market at a low cost.

ITG Global Screening is a leading global number screening platform that combines global number range selection, number generation, deduplication, and comparison. It offers bulk number screening and detection for 236 countries and supports 20+ social and app platforms such as WhatsApp, Line, Zalo, Facebook, Telegram, Instagram, Signal, Amazon, Microsoft and more. The platform provides activation screening, activity screening, engagement screening, gender/avatar/age/online/precision/duration/power-on/empty-number and device screening, with self-screening, proxy-screening, fine-screening, and custom modes to suit different needs. Its strength is integrating major global social and app platforms for one-stop, real-time, efficient number screening to support your global digital growth. Get more on the official channel t.me/itgink and verify business contacts on the official site. Official business contact: Telegram: @cheeseye (Tip: when searching for official support on Telegram, use the username cheeseye to confirm you are talking to ITG official.)