Team chat

Open-source alternatives to commercial team messaging.

Slack

Pages for Slack customers moving team chat to self-hosted Mattermost, Rocket.Chat or Matrix with Element.

Microsoft Teams

Pages for Microsoft Teams customers replacing Teams chat and meetings with self-hosted Mattermost, Matrix with Element, or the openDesk suite.

Discord

Pages for companies and communities running on Discord servers that want a self-hosted Matrix or Zulip server they control.

Skype for Business Server

Skype for Business Server is Microsoft's on-premises chat, presence and conferencing server, now sold as Subscription Edition. Pages here cover replacing it with self-hosted Mattermost, Matrix with Element and Jitsi.

AWS Wickr

AWS Wickr is Amazon's end-to-end encrypted messaging and calling service, with AWS WickrGov in GovCloud. Pages here cover replacing it with self-hosted Matrix and Element or Rocket.Chat.

Talk to our team.

Tell us what you're working on, whether it's a deployment, an audit, a security test or a cyber range. You'll speak with an engineer who can help you scope it.

  • 30-minute call: free, with no obligation.
  • NDA on request: we can sign before you share details.
  • Clear next steps: a scope and plan after the call.
Book a callhello@deployopen.com