Open Source Communication & Collaboration Tools

Alternative toHootsuite

Schedule content on 20+ social networks with AI writing support

• 37,449 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative toMicrosoft OneDrive

Self-hosted collaboration hub with file sync, calendar, and messaging.

• 37,178 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative toElement

Peer-to-peer encrypted chat over Bluetooth mesh network

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

Alternative toGlean

Self-hosted knowledge base with RAG search, AI agent, and wiki

• 34,874 GitHub stars
• MITLicence MIT
• #LLM

Alternative toWispr Flow

Free offline speech-to-text: runs on Windows, macOS, and Linux

• 34,209 GitHub stars
• MITLicence MIT

Alternative toJJamie

Privacy-first AI meeting notes that run entirely on your device

• 31,844 GitHub stars
• MITLicence MIT

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 toTrello

Open source project management: Kanban, Scrum, and lists

• 26,518 GitHub stars

Alternative toSlack

Organized team chat with threaded conversations, self-hostable

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