Converse is a free and open-source XMPP chat client written in JavaScript which can be tightly integrated into any website.
The benefit of using converse.js as opposed to relying on a SaaS (software-as-a-service) solution, is that your users can have a much more customized, streamlined and integrated webchat experience and that you have control over the data. The latter being a requirement for many sites dealing with sensitive information.

### Features

- File sharing (not working yet) 
- End to end message encryption (XEP-0384 OMEMO)
- Open chats via URL
- Notifications
- Multilingual Support
- Moderating chatrooms
- Passwordless login with client certificates