Alternatives to Slack

See content and chat history anytime, including team chats with Skype that are visible to the whole team. Private group chats are available for smaller group conversations. ...

Discord is a modern free voice & text chat app for groups of gamers. Our resilient Erlang backend running on the cloud has built in DDoS protection with automatic server failover. ...

Trello is a collaboration tool that organizes your projects into boards. In one glance, Trello tells you what's being worked on, who's working on what, and where something is in a process. ...

Skype’s text, voice and video make it simple to share experiences with the people that matter to you, wherever they are. ...

Asana is the easiest way for teams to track their work. From tasks and projects to conversations and dashboards, Asana enables teams to move work from start to finish--and get results. Available at asana.com and on iOS & Android. ...

Yammer brings the power of social networking to your company. Collaborate securely across departments, geographies, content and business applications. ...

Basecamp is a project management and group collaboration tool. The tool includes features for schedules, tasks, files, and messages. ...

Mattermost is modern communication from behind your firewall.