Open Source Communication & Collaboration Tools

Alternative toiMyfone ChatsBack

Archive and browse WhatsApp backups locally

• 243 GitHub stars
• GPL-3.0Licence GPL-3.0

Alternative toSlack

Matrix team chat with a companion identity server

• 173 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #Chat

Alternative toWWhatsApp

Free P2P encrypted messaging, calls, and file sharing

• 169 GitHub stars
• GPL-3.0Licence GPL-3.0
• #Chat

Alternative toExcalidraw+

Self-hosted Excalidraw with team space, folders, and live collab.

• 153 GitHub stars
• MITLicence MIT

Alternative toNotion

Docs, databases, whiteboards; self-hosted in one container, AGPL-3.0.

• 120 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative toGrok Bot

Hire a team of AI agents and run it from your phone, on a server you own.

• 114 GitHub stars
• MITLicence MIT
• #AI Agents

Alternative toZoho Mail

AGPL mail backend with an official Flutter client

• 100 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #Email

Alternative toElevenLabs

Empathic voice AI SDK with open source emotional models

• 83 GitHub stars
• MITLicence MIT
• #AI SDK

Alternative toGrok Bot

Self-hosted AI coworker for Slack and Discord with autonomous action.

• 59 GitHub stars
• MITLicence MIT
• #AI Agents

Alternative toSlack

Decentralized open source workplace with chat and docs

• 59 GitHub stars
• MPL-2.0Licence MPL-2.0
• #Chat

Alternative toMEE6

CLI for building AI agents and automating Discord servers

• 42 GitHub stars
• MITLicence MIT
• #AI Agents

Alternative toGhost

Federated blogging over ActivityPub, self-hostable in one command

• 28 GitHub stars
• AGPL-3.0Licence AGPL-3.0