Limits of the WhatsApp Business app Broadcast List
The free WhatsApp Business app allows creating broadcast lists with a maximum of 256 contacts each. Every contact must have saved your number in their address book, otherwise the message is not delivered. There is no API: you must send each broadcast manually from the phone.
No delivery or read statistics are available, you cannot personalize the message for each contact, and you cannot schedule sends. For professional communication with more than a few hundred clients, these limits become unsustainable.
What changes with the Business API
With the WhatsApp Business API, Broadcast List limits disappear: you can send to thousands of contacts without numerical limits, the message is delivered even to contacts who have not saved your number, every message is personalized with dynamic variables, and you have complete delivery and read statistics.
The API allows programmatic sending via code or no-code tools like Make and Zapier, enabling event-based triggers without manual intervention.
When to stay on the app and when to switch to the API
Stay on the free WhatsApp Business app if: you have fewer than 100-200 active clients, do not need automations, send occasional communications and have no technical resources for API integration.
Switch to the Business API if: you have more than 500 contacts, want to personalize messages for each client, need to integrate WhatsApp with your CRM, or want to schedule automatic sends based on business events.
