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Open Source Communication & Collaboration Tools

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167 projects, sorted by GitHub stars.

pyvideotrans

Alternative toRask AI

Open source video translation with AI dubbing and voice cloning

  • 19,701 GitHub stars
  • GPL-3.0Licence GPL-3.0

simplex-chat

Alternative toWWhatsApp

Private messaging without user IDs or servers.

  • 19,680 GitHub stars
  • AGPL-3.0Licence AGPL-3.0

Kap

Alternative toCleanShot X

Open source screen recorder for macOS with web tech

  • 19,405 GitHub stars
  • MITLicence MIT
  • #Video

Bluesky

Alternative toX (formerly Twitter) Premium

Own your account and move freely across compatible servers

  • 18,389 GitHub stars
  • MITLicence MIT

cli

InCommunication & Collaboration

Official Lark/Feishu CLI with 200+ commands and AI Agent Skills

  • 18,041 GitHub stars
  • MITLicence MIT
  • #AI Agents

OpenProject

Alternative toJira

Plan projects with Gantt, Scrum, and Kanban, all self-hostable

  • 17,227 GitHub stars
  • GPL-3.0Licence GPL-3.0

Postal

Alternative toSendGrid

Self-hosted email server for inbound and outbound delivery.

  • 16,954 GitHub stars
  • MITLicence MIT

FreshRSS

Alternative toFeedly

Self-hosted RSS aggregator for news, podcasts, and video channels.

  • 16,562 GitHub stars
  • AGPL-3.0Licence AGPL-3.0

Gotify

Alternative toPushover

Self-hosted push notification server with REST API and Android client

  • 16,197 GitHub stars
  • MITLicence MIT

Stalwart

Alternative toMicrosoft 365

Mail and collaboration server in Rust, one binary for everything.

  • 15,854 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #Email

Seafile

Alternative toGoogle Drive

Self-hosted file sync with client-side encryption for teams.

  • 15,446 GitHub stars
  • CustomLicence GPL-2.0 with OpenSSL exception

PeerTube

Alternative toVimeo

Federated video hosting you own, with no YouTube dependency

  • 15,396 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #Video
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