Morph.ai processes large message volumes on a daily basis and scaling is not a concern for our infrastructure.

However, WhatsApp imposes messaging limits.

1.  You can only start with sending notifications to 1000 users a day. This limit increases with the quality rating.
2. There's an inherent limit of 20/50 requests per second in WhatsApp APIs.

More on both of these in the official documentation here:
https://developers.facebook.com/docs/whatsapp/api/rate-limits