Rocket.Chat vs Slack : Which is Better?

Rocket.Chat

Rocket.Chat free open source chat solution. Developed by RocketChat

License: Open Source

Apps available for Mac OS X Windows Linux Android iPhone

Slack is a cloud-based team collaboration tool. Developed by Slack Technologies, Inc.

License: Freemium

Apps available for Mac OS X Windows Linux Online Android

Feature	Rocket.Chat	Slack
Extensible by Plugins/Extensions
Integrated File Sharing
Share your screen
Video conferencing
Voice messages
Ad-free
Bots
Channels
Chat Bot
Group chat
Live Chat
Location Mapping
Self-Serve Capability
Slack integration
Video chat
Video Conferencing
Video calling
Voice Call
Group collaboration
Multi Channel
Team Collaboration
End-to-End Encryption
Decentralized
Security & Privacy
On-premises software
Self-hosted in intranet or private cloud
Federation
Chat
No registration required
Browser based
Video streaming
Audio Calling
Threaded Conversations
Chat organizer
Automatic Transcript
Planner
Microsoft Office integration
Office 365 integration
Social feed
Bitbucket Integration
Box.com integration
Built-in File Manager
Collaborative
IFTTT integration
Onboarding
Out Of The Box
Reactions
App integration
Channel manager
Direct file uploading
Electron based
HIPAA compliant
Live Push Notifications
Support for @mentions
Multiple channels
Multiple teams
Real time collaboration
Team work
Security focused
Encrypted chat
Gmail integration
Privacy-friendly
Content Templates
File sharing
Gantt-charts
Apps that Sync with Google Calendar