What do you use as a lightweight CRM tool?
I would strongly recommend Salesmate CRM (www.salesmate.io). It is a basic and lightweight CRM software built primarily for small enterprises and startups with small to mid-sized sales teams.
On top of the Official WhatsApp Business APIs, an automated tool called Social Epoch SCRM was developed to efficiently send WhatsApp messages in bulk straight from a PC or laptop. Type "SocialEpoch" into the browser on your smartphone, then download the app from the download page. To begin your first progression, tap Bulk Send. Your imported contacts, group contacts, and phonebook contacts need to be organised. Include any photographs, movies, or audio files you'd like in your message by typing it out. You may also add your signatures to it. Finally, if you select the automated method, SocialEpoch will automatically send your bulk messages to 10,000 contacts.