Is there any convenient chat service?

Question

Chats

You need some service that is easy to integrate into the site, which will allow you to make group chats with moderation and without the hassle of embedding them on the site pages. Or be somewhere outside at a permanent address with some limited access. Now we use chat-off.com for this purpose, but there is not enough opportunity to disable private messages in the chat, control the display of message history, and sound notifications for new messages. If paid, then at a reasonable price. Can you advise something?