There is a 3rd alternative...
Atolia, the one and only workspace your team needs
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Why choose Chanty or Rocket.Chat?
Both tools offer chat, file sharing, mentions, voice messages, groups/channels, GIFs and emojis, and threads. Chanty offers 1-1 video calls, group video calls, and breakout rooms, while Rocket.Chat requires integration for 1-1 and group video calls. Rocket.Chat offers features such as newsfeed, task management, and two-factor authentication, while Chanty offers features such as roles management and workspace and user activity. Overall, both tools have their unique features and strengths, and the choice between them would depend on the specific needs of the user or organization.