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Open Source Team Chat & Messaging Tools using Golang

A curated collection of the best open source platforms for real-time team messaging, with channels, direct messages, threads, file sharing, and app integrations. using Golang.

Mattermost

Secure collaboration platform for mission-critical work

  • Stars

    39,510

  • Last commit

    9 hours ago

  • License

    Unknown
Mattermost provides a flexible, open-source platform for secure team collaboration, designed for organizations with strict security and privacy requirements.

Open Source Alternative to:

Microsoft Teams

Fluxer

Open source messaging with privacy and community focus

  • Stars

    10,750

  • Last commit

    8 hours ago

  • License

    AGPL-3.0
Free, open-source instant messaging and VoIP platform with full Markdown support, voice/video calls, moderation tools, and self-hosting options for communities.

Open Source Alternative to:

Discord
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