Chat Open Source Tools

Alternative toBettermode

Open source forum and community platform, self-hosted

• 47,998 GitHub stars
• GPL-2.0Licence GPL-2.0
• #Chat

Alternative toMicrosoft Teams

Self-hosted team chat with voice, video, and omnichannel support

• 46,298 GitHub stars
• MITLicence MIT
• #Chat

Alternative toCourier

Open source notification infrastructure for product teams

• 40,175 GitHub stars
• MITLicence MIT

Alternative toSlack

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

• 39,388 GitHub stars
• #Chat

Alternative toVercel AI SDK

Add in-app AI copilot chat and actions to any React application

• 38,138 GitHub stars
• MITLicence MIT
• #AI Agents

Alternative toZendesk

Self-hosted customer support platform with live chat and AI

• 38,029 GitHub stars
• MITLicence MIT

Alternative toElement

Peer-to-peer encrypted chat over Bluetooth mesh network

• 36,662 GitHub stars
• UnlicenseLicence Unlicense
• #Chat

Alternative toZoom

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

• 30,112 GitHub stars
• Apache-2.0Licence Apache-2.0
• #Video

Alternative toLinear

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

• 27,941 GitHub stars
• EPL-2.0Licence EPL-2.0

Alternative toSlack

Organized team chat with threaded conversations, self-hostable

• 26,085 GitHub stars
• Apache-2.0Licence Apache-2.0
• #Chat

Alternative toVoiceflow

Visual chatbot builder with LLM integration and live deployment

• 22,570 GitHub stars
• MITLicence MIT
• #Chatbots