Are there solutions to collect messages from Whatsapp / Viber sent to my number?

Question

Messengers

Problem : More than 20,000 users write to my number using various messengers.
I would like to be able to periodically upload all posts with all content and view them in a feed format, group and store all correspondence with each contact.
Purpose : to collect and export messages sent to my number via instant messengers.
It is important to have the sender number, contact name, message text and attachments.
PS With Telegram it is clear how to achieve the goal. Whatsapp and Viber are important.