Alternative apps to Slack:
  • 4.34.3
    331 votes

    Skype is free and simple software that will enable you to make free calls anywhere in the world in minutes.

    • Freeware
    • Windows
  • 3.13.1
    11 votes

    Supercharge team collaboration with group chat and IM.

    • Freeware
    • Windows/macOS/Linux/Android
  • Not rated yet
    0 votes

    Franz is a free messaging app that combines chat & messaging services into one application. Franz currently supports Slack, WhatsApp, WeChat, HipChat, Facebook Messenger, Telegram, Hangouts, GroupMe, Skype, and more.

    • Freeware
    • Windows/macOS/Linux