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WhatsApp platform

Messaging limits

Messaging limits are Meta's cap on how many unique customers a WhatsApp number may start conversations with in a rolling 24-hour period.

Also calledmessaging tierWhatsApp tier

Numbers start at a low tier and move up as sending volume grows while quality holds. Business verification is a prerequisite for the higher tiers. Replies to customers who messaged you do not count against the limit, which is another reason inbound-led messaging is easier to scale than outbound.

Worth knowing alongside it.

Quality rating
Quality rating is Meta's assessment of how customers react to messages from a WhatsApp number or template, based largely on blocks and reports.
Business verification
Business verification is Meta's process of confirming that a business is a real legal entity, using documents such as registration records and a verifiable business address or phone number.
Conversation window
The conversation window is the period, 24 hours on WhatsApp, Instagram, and Messenger, during which a business may send free-form messages after a customer's most recent message.