Open Source Communication & Collaboration Tools

Alternative toPlex

Open source web UI for media streaming, powered by community addons.

• 14,704 GitHub stars
• GPL-2.0Licence GPL-2.0
• #Video

Alternative toElevenLabs

Instantly convert text to speech with customizable options

• 13,772 GitHub stars
• MITLicence MIT

Alternative toSlack

Secure team chat built on the Matrix open protocol

• 13,601 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #Chat

Alternative toSendbird Chat

Self-hosted instant messaging platform for web and mobile apps

• 13,529 GitHub stars
• GPL-3.0Licence GPL-3.0
• #Chat

Alternative toWispr Flow

Voice-to-text for macOS with on-device AI and zero cloud dependency

• 12,327 GitHub stars
• GPL-3.0Licence GPL-3.0

Alternative toPusher

Scalable real-time messaging server with WebSocket support

• 10,892 GitHub stars
• Apache-2.0Licence Apache-2.0

Alternative toHubSpot Marketing Hub

Self-hosted marketing automation with email and campaigns

• 10,806 GitHub stars
• GPL-3.0Licence GPL-3.0
• #Email

Alternative toWWhatsApp

A secure messaging app focused on privacy and user experience.

• 10,742 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #Chat

Alternative toWispr Flow

Local-first voice dictation with Whisper, offline mode, and AI cleanup

• 9,640 GitHub stars
• MITLicence MIT
• #AI Agents

Alternative toDropbox

Self-hosted file sharing with data sovereignty for teams and enterprises.

• 8,837 GitHub stars
• AGPL-3.0Licence AGPL-3.0