Are there any limits to the number of messages you can send using the WhatsApp Business API? – Sinch

Messaging limits determine how many unique customers your business can send messages to on a daily basis. This includes new conversations as well as existing conversations with customers.

The messaging limit does NOT limit the number of messages your business can send, just the number of customers you are trying to send messages to. It also does NOT apply to messages sent in response to a customer-initiated message within a 24-hour period.

Messaging limits are divided into several tiers:

Tier	Unique customers	Explanation
Tier 1	2000	Allows your business to send messages to 2K unique customers in a rolling 24-hour period. Note: A business starts in Tier 1 when it registers its phone number with WhatsApp. Prior to business verification, the business is limited to 250* unique customers per day.*
Tier 2	10,000	Allows your business to send messages to 10K unique customers in a rolling 24-hour period.
Tier 3	100,000	Allows your business to send messages to 100K unique customers in a rolling 24-hour period.
Tier 4	Unlimited	Allows your phone number to have unlimited business-initiated conversations in a rolling 24-hour period.

The example below shows how the messaging limit applies for a Tier 1 number:

A business’ phone number will be upgraded to the next tier if:

Its quality rating is not low, and
The cumulative number of customers it sends notifications to adds up to at least half of its current messaging limit within a 7-day period. Once the business reaches this threshold, it will be moved to the next tier.

The chart below shows an example of how a business might move to the next tier.

Example: A business is upgraded from Tier 1 to Tier 2 when it messages a total of 1,000 customers within a 7-day period.

Note that, if WhatsApp customers provide negative feedback to Meta regarding your business' messaging (for example, if a customer reports that they are being spammed by your business), Meta may reduce your tier rating. To avoid having your tier rating reduced, we recommend maintaining awareness of your current messaging limit, sending messages to no more than the allowed number of contacts within the messaging limit, and sending high-quality messages.

Learn how you can send WhatsApp messages to your customers easily and securely using the Sinch WhatsApp Business API.

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