is there any Plugin that enables us to chat on WhatsApp inside the website not by going web.whatsapp.com. I checked many plugins that allow chatting but it will redirect us to WhatsApp website.
Thanks in advance.
No there is no such thing available, as WhatsApp allows you to interact by going web.whatsapp.com only.
You can use plugins like WP Social Chat :
WhatsApp Chat also allows you to include a box to show some contact information and a personalized message. This box can be activated through the Box tab inside the WhatsApp chat section and here you can define the header and footer message, contact name, phone, work, and avatar
WhatsApp Chat Features