What We Learned Sending 10,000 WhatsApp Messages
Posted: Mon May 19, 2025 10:00 am
WhatsApp has emerged as one of the most effective direct communication channels for businesses looking to connect with customers at scale. With over 2 billion users globally and sky-high open rates compared to traditional email, it offers a unique opportunity for brands to engage audiences in a personal, conversational format.
To test the power of this channel, we ran a series of WhatsApp campaigns—sending over 10,000 messages across different customer segments and objectives. From lead generation and event promotions to post-purchase engagement and support automation, this initiative offered us valuable lessons on what works and what doesn’t when marketing via WhatsApp.
In this article, we break down the biggest list of belgium whatsapp phone numbers lessons we learned, how we optimized performance, and what you can apply to your own WhatsApp marketing efforts.
1. Message Timing Is Everything
One of the first lessons we learned was that timing dramatically influences response rates. Sending a message at 10 AM versus 8 PM led to up to 32% difference in open and reply rates.
Best-performing time windows: Messages sent between 11 AM and 1 PM or between 6 PM and 8 PM saw the highest engagement. These slots often coincide with breaks or end-of-day routines, making users more likely to engage.
Worst-performing times: Early mornings and post-10 PM messages typically went ignored or, worse, led to user opt-outs.
Key takeaway: Use audience behavioral data to time your messages. Consider experimenting with A/B tests to find the sweet spot.
2. Personalization Increases Replies by Over 50%
We ran two versions of the same message: one generic and one personalized using the recipient’s name and past interactions (e.g., product they browsed). The result? A 53% increase in replies on the personalized version.
To test the power of this channel, we ran a series of WhatsApp campaigns—sending over 10,000 messages across different customer segments and objectives. From lead generation and event promotions to post-purchase engagement and support automation, this initiative offered us valuable lessons on what works and what doesn’t when marketing via WhatsApp.
In this article, we break down the biggest list of belgium whatsapp phone numbers lessons we learned, how we optimized performance, and what you can apply to your own WhatsApp marketing efforts.
1. Message Timing Is Everything
One of the first lessons we learned was that timing dramatically influences response rates. Sending a message at 10 AM versus 8 PM led to up to 32% difference in open and reply rates.
Best-performing time windows: Messages sent between 11 AM and 1 PM or between 6 PM and 8 PM saw the highest engagement. These slots often coincide with breaks or end-of-day routines, making users more likely to engage.
Worst-performing times: Early mornings and post-10 PM messages typically went ignored or, worse, led to user opt-outs.
Key takeaway: Use audience behavioral data to time your messages. Consider experimenting with A/B tests to find the sweet spot.
2. Personalization Increases Replies by Over 50%
We ran two versions of the same message: one generic and one personalized using the recipient’s name and past interactions (e.g., product they browsed). The result? A 53% increase in replies on the personalized version.