WhatsApp is launching new pay-to-use tools for businesses to communicate with their customers.
The move will allow its owner, Facebook, to make money from WhatsApp, which has lacked a revenue stream since dropping subscription fees.
Companies will be able to provide information and services, such as delivery dates or boarding passes, to customers via the platform.
In return, the businesses will pay a fee for a confirmed delivery.
The messages are set to cost between 0.5 cents to 9 cents (0.3p to 7p) a message depending on the country the user is based in. They can be automated or provided by human customer assistants.
The price means they will often be more expensive to use than more basic SMS-based texts.
Like other messages sent via the platform, they will be encrypted, meaning WhatsApp will not be able to read them itself.
However, the Wall Street Journal reported that companies would be allowed to store copies of the messages elsewhere in a decrypted state.