1 Free & Open Source Alternative to Slack (2026)

Compare 1 free and open-source alternative to Slack: Discord. Pros, cons, pricing, and screenshots tested 2026.

Slack

Freemium ★ ★ ★ ★ ★ 4.0

Slack is a team communication and collaboration platform offering channels, direct messaging, file sharing, and integrations with hundreds of third-party apps to streamline workplace productivity.

Freemium
1 free options
Communication Tools
4 / 5
Why people look for alternatives Slack has a free tier with limitations. Many users seek fully free or open-source alternatives that offer the same capabilities without paywalled features or usage caps.
Slack team Visit Slack →

Quick Comparison

Tool Pricing Best for Rating
Discord
Freemium Gaming communities, hobby groups, and informal team communication ★ ★ ★ ★ ★ 4.0

Detailed Reviews

Discord

A voice, video, and text communication platform built for communities, gamers, and teams. Discord offers free persistent servers with chat rooms, voice channels, and screen sharing.

★ ★ ★ ★ ★ 4.0
Freemium Best for: Gaming communities, hobby groups, and informal team communication

Free for basic use; Discord Nitro at $9.99/month for enhanced features like higher upload limits and custom emojis

3 screenshots — click to enlarge

Discord Screenshot 1
Discord Screenshot 2

✓ Pros

  • Free tier includes unlimited messaging, voice channels, and up to 25MB file uploads
  • Excellent voice chat quality with low latency and noise suppression
  • Strong community-building features: roles, permissions, and moderation bots
  • Cross-platform support on Windows, macOS, Linux, iOS, Android, and web
  • Rich integrations with gaming platforms, bots, and third-party apps
  • Persistent chat history available in the free tier

✕ Cons

  • Not optimized for formal workplace collaboration compared to Slack or Teams
  • Free file upload limit is 25MB (500MB for Nitro subscribers)
  • Video call limit of 25 participants in the free tier
  • Can become noisy and distracting with many servers and channels
  • Lacks native task management and calendar features found in productivity suites
  • Privacy concerns around data collection and usage practices

Some links are affiliate. We never accept payment for inclusion or ranking.