Have your own web chat. Developed with Meteor.com, Rocket.Chat is a great solution for developers looking forward to build and evolve their own chat platform.
Ranked in these QuestionsQuestion Ranking
Pro Free and open source
Pro Native apps for all major desktop and mobile platforms
Rocket.Chat has native apps for macOS, Windows, Linux, iOS and Android.
Pro Supports a wide variety of authentication methods
In addition to the usual email / username + password combination, Rocket.Chat supports authenticating via Facebook, Github, Gitlab, Google, Linkedin, Meteor and Twitter accounts.
Pro Very active and helpful community
Pro Will allow for anonymous use
Pro Video conferencing support
Rocket.Chat supports video calls.
Con No way to block new registrations
Without the ability to disable registrations, there's no way to control access to the chat.