Best Slack Alternatives in 2025
Slack transformed team communication but became expensive for growing teams. Many companies cap free plan usage aggressively and search for open alternatives.
Why are builders looking for Slack alternatives?
Slack has been one of the most popular tools in its category for years, and for good reason—team messaging and collaboration hub. But as teams grow and use cases evolve, many builders find themselves hitting limitations around pricing, performance, privacy, or feature focus.
The GetSpotted community has hyped and roasted 5 alternatives to Slack, giving you a real picture of what builders actually switched to—not just what gets sponsored placement in review listicles. Each alternative below has been submitted by a maker and voted on by the community.
Common reasons for switching from Slack include pricing at scale, data ownership, self-hosting options, or simply wanting a tool that does one thing extremely well instead of trying to do everything. Whether you need a free Slack alternative, an open-source Slack alternative, or just something with better UX, the community has found options worth considering.
Recommended alternative to Slack
Real-time chat, voice and video built for communities and teams. Free, fast and endlessly customizable.
5 Slack alternatives
Sorted by community hypesSome links are affiliate links — GetSpotted may earn a commission if you sign up, at no extra cost to you. It never affects rankings or which alternatives we show.
Chat & meetings inside Microsoft 365
Microsoft's collaboration hub with chat, video meetings and deep Office integration, free for small teams.
Open-source, self-hosted team chat
A secure, self-hostable Slack alternative for teams that need data control and compliance.
Threaded team chat done right
An open-source team chat organized by topics, so async conversations stay readable instead of a wall of messages.
Pro only
Unlock all alternatives
Open-source communications platform
A fully open-source, self-hosted team chat with end-to-end encryption, ideal for security-conscious orgs.
1 more alternatives unlocked with Pro plan
Quick summary
- See all 5 alternatives
- Feature comparison table
- Community analytics
- Full pros & cons
Feature comparisonPro
Top 4 alternatives vs each other| Feature | Microsoft Teams | Mattermost | Zulip |
|---|---|---|---|
| Pricing model | ✓ | ✓ | ✗ |
| Free tier | ✓ | ✗ | ✓ |
| Self-hostable | ✗ | ✓ | ✓ |
| API access | ✓ | ✓ | ✗ |
| Mobile app | ✓ | ✗ | ✓ |
| Offline mode | ✗ | ✓ | ✓ |
| Data export | ✓ | ✓ | ✓ |
| Team collaboration | ✓ | ✓ | ✓ |
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How to choose the best Slack alternative
Consider your team size
Many Slack alternatives offer flat pricing that becomes more economical as your team grows. Per-seat pricing models can become expensive quickly, so look for alternatives with team-friendly billing.
Check data portability
Before switching, verify that your chosen Slack alternative supports import and export of your existing data. A migration path is critical for any tool switch to be low-risk.
Evaluate self-hosting options
Several community-built Slack alternatives support self-hosting, giving you complete data ownership and removing dependency on third-party infrastructure and pricing decisions.
Trust community ratings
Unlike sponsored review sites, every hype and roast on GetSpotted comes from builders who have actually used these tools. Sort by hype count to see what the community genuinely recommends.