When comparing Rocket.Chat vs Mattermost, the Slant community recommends Rocket.Chat for most people. In the question“What is the best team chat software?” Rocket.Chat is ranked 6th while Mattermost is ranked 7th. The most important reason people chose Rocket.Chat is:
Rocket.Chat is available for free. It's licensed under the MIT license with source code available on [GitHub](https://github.com/RocketChat/Rocket.Chat).
Ranked in these QuestionsQuestion Ranking
Pro Free and open source
Rocket.Chat is available for free. It's licensed under the MIT license with source code available on GitHub.
Pro Native apps for all major desktop and mobile platforms
Rocket.Chat has native apps for macOS, Windows, Linux, iOS and Android.
Pro Very active and helpful community
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 Video conferencing support
Rocket.Chat supports video calls.
Pro Will allow for anonymous use
Pro One-line Docker install
With Docker set up, you can install Mattermost with the following command:
docker run --name mattermost-dev -d --publish 8065:80 mattermost/platform
For other cases, installation instructions can be found here.
Pro Can be self-hosted
You don't need to rely on someone else's servers, you can host Mattermost on your own server.
Con No way to block new registrations
Without the ability to disable registrations, there's no way to control access to the chat.
Con Poor Android application
Mattermost's Android application is thus far (2017-01-10) still just a poorly wrapped webview with the usual performance problems and a lack of offline functionality.