Are there free modules/widgets for chatbots/messengers for websites?

Question

JavaScript

Good afternoon, colleagues.
Please recommend widgets/modules for chatting with site visitors. Those. the ability to send-receive messages, answer the visitor's question, i.e. standard messenger.
REQUIREMENT:
At least the basic functionality is free.
Ability to customize skins.
Possibility of conducting conversation history.
IDEALLY in JS.
As few dependencies as possible.
On the portal already, here is%, there were such "toasts" ... I can not find it. Please point them out then.
Many thanks in advance for your help!

Answer 1

Look here :)