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icon of Revolt

Revolt

Communication & Collaboration

Self-hosted open source Discord alternative with servers

stars 2.3K
ChatOpen CoreSelf Hosted+3
icon of Matrix

Matrix

Communication & CollaborationWeb & App DevelopmentIT Management+1

Open protocol for secure, decentralized messaging and VoIP

stars 12.1Klicense Apache-2.0lang Python
ChatSecurityWebSocket Servers+11
icon of Element

Element

Communication & CollaborationSecurity & MonitoringIT Management+1

Secure team chat built on the Matrix open protocol

stars 13Klicense AGPL-3.0lang TypeScript
ChatFile SharingSecurity+8
icon of Zulip

Zulip

Communication & CollaborationBusiness & Productivity

Organized team chat with threaded conversations, self-hostable

stars 25.1Klicense Apache-2.0lang Python
ChatOpen CoreSelf Hosted+2
icon of Tox

Tox

Communication & CollaborationSecurity & Monitoring

Free encrypted P2P messaging and voice calls, no servers

stars 2.6Klicense GPL-3.0lang C
ChatSecurityFile Sharing+2
icon of Jami

Jami

Communication & CollaborationSecurity & Monitoring

Free P2P encrypted messaging, calls, and file sharing

stars 165license GPL-3.0lang C++
ChatFile SharingSecurity+7
icon of Tinode

Tinode

Communication & CollaborationWeb & App DevelopmentIT Management

Self-hosted instant messaging platform for web and mobile apps

stars 13.3Klicense GPL-3.0lang Go
ChatWebSocket ServersSelf Hosted+7
icon of Jitsi

Jitsi

Free video conferencing you can self-host with no account needed

stars 29.1Klicense Apache-2.0lang TypeScript
VideoSelf HostedOpen Core+3
icon of Chatwoot

Chatwoot

Customer SupportAI & Machine LearningCommunication & Collaboration

Self-hosted customer support platform with live chat and AI

stars 28.9Klicense NOASSERTIONlang Ruby
Customer SupportChatbotsKnowledge Base+10
icon of Mattermost

Mattermost

Communication & CollaborationSecurity & MonitoringIT Management

Team messaging for security-sensitive teams with air-gap support

stars 36.4Klicense NOASSERTIONlang TypeScript
Self HostedChatWorkflow Automation+5
icon of Huly

Huly

Product & Project ManagementCommunication & CollaborationBusiness & Productivity

One open source workspace to replace Jira, Slack, and Notion

stars 25.5Klicense EPL-2.0lang TypeScript
Project ManagementKnowledge ManagementFile Sharing+5
icon of Wire

Wire

IT ManagementCommunication & CollaborationSecurity & Monitoring

End-to-end encrypted messaging, voice, and file sharing

stars 2.8Klicense AGPL-3.0lang Haskell
ChatFile SharingVideo+6
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