WhatBot Plus is the best software that allows to do this in a simple way to Send a Message to all Whatsapp Contacts (without using Broadcast). It is very simple and you just need to follow these steps.
How to Send a Message to all Whatsapp Contacts (without using Broadcast)
Step 1. Download and install WhatBot Plus
NB: The free version does not allow you to import all contacts from whatsapp. You need to purchase the license to enable this feature.
Once installed you will see this main screen:
Step 2. Open Whatsapp and scan QR Code
Once you open WhatBot Plus click on “Open Whatsapp” button on the top left
It will open the window with a QR code that you have to scan with the scanner integrated into the Whatsapp app of your phone.
After that you scan the QR Code the software will show “READY” on the top right.
Step 3. Import All Whatsapp Contacts
Tap on Imports button and then select Imports Whatspp Contacts
All your whatsapp contacts will be automaticaly added in the program. You will see name and number of each contact.
Step 4. Send message to all your whatsapp contacts
Enter the message in the box on the righ. You can enter a textual message and also attach documents or photo. In the message you can also use the variable [[fullname]] to automatically enter the name of the contact and send a customized message.
Finally click on Send Now to start the sending.