Why Teams Are Looking for Slack Alternatives
Slack dominated team communication for a decade. But in 2025, three forces are pushing teams to explore alternatives:
Cost: Slack Pro costs $7.25/user/month. For a 50-person team, that's $4,350/year — just for chat. Many competitors offer comparable features at lower cost or free.
Microsoft Teams bundling: Organizations already paying for Microsoft 365 get Teams included. Paying separately for Slack becomes hard to justify.
Privacy and data control: Some organizations want to self-host their communication data. Slack is cloud-only with no self-hosting option.
Here are the best alternatives for different use cases.
Microsoft Teams — Best for Microsoft 365 Users
If your organization uses Microsoft 365 (formerly Office 365), Teams is already included in your subscription. Using Slack alongside Microsoft 365 means paying for duplicated functionality.
What Teams does well:
- Deep integration with Word, Excel, SharePoint, and Outlook
- Video calls and meetings built in (rival Zoom for many use cases)
- File storage via SharePoint (with version history)
- Guest access for external collaborators
- Channels, direct messages, threads
What Teams does poorly:
- User interface is more complex than Slack
- Third-party app ecosystem smaller than Slack's
- Less intuitive for new users
Pricing: Included with Microsoft 365 Business Basic ($6/user/month). Teams Essentials standalone: $4/user/month.
Best for: Organizations already on Microsoft 365.
Discord — Best Free Option for Small Teams
Discord began as a gaming communication platform but has evolved into a legitimate business communication tool for small teams and communities.
What makes it compelling:
- Completely free for unlimited users, unlimited message history
- Voice channels (always-on voice rooms — join whenever)
- Server organization with unlimited channels and categories
- Screen sharing and video calls
- Bot ecosystem for automation
- Excellent mobile apps
Limitations for business:
- No built-in document collaboration
- Less polished than Slack for professional contexts
- DMs can feel informal
- No dedicated business support
Pricing: Free. Nitro (premium features) at $9.99/month per user — rarely needed for teams.
Best for: Small teams (under 20 people), developer teams, communities, anyone who needs free unlimited communication.
Mattermost — Best Self-Hosted Slack Alternative
Mattermost is an open-source Slack alternative designed for organizations that need to keep data on their own servers.
What it offers:
- Self-hosted: deploy on your own infrastructure (AWS, Azure, on-premise)
- Slack-compatible: import Slack history, similar interface
- Compliance: GDPR, HIPAA, SOC 2 compliant for self-hosted deployments
- Integrations: GitHub, Jira, Jenkins and hundreds more
- Channels, direct messages, threads — full Slack feature parity
Pricing: Free (self-hosted, up to 10 users). Professional: $10/user/month. Enterprise: custom.
Best for: Healthcare, government, financial services, and any organization that cannot store communication data in third-party cloud.
Rocket.Chat — Best Open Source Option
Rocket.Chat is open source with more flexibility than Mattermost, including a free cloud option.
Key features:
- Self-hosted or cloud-hosted
- Omnichannel: combine team chat with customer support in one platform
- Video calling via Jitsi integration
- Livechat for customer-facing communication
- Extensive bot and integration support
Pricing: Free (self-hosted, unlimited users). Pro: $4/user/month cloud.
Best for: Teams that want open source + free self-hosting + customer communication in one platform.
Google Chat — Best for Google Workspace Users
Similar to Teams for Microsoft users, Google Chat is included with Google Workspace.
What it offers:
- Integrated with Gmail, Drive, Meet, and Docs
- Spaces (channels) and direct messages
- Google Meet for video calls
- File sharing directly from Drive
Limitation: Less feature-rich than Slack. Google has a reputation for killing products — some organizations are wary.
Pricing: Included with Google Workspace ($6/user/month Business Starter).
Best for: Organizations already on Google Workspace.
Twist — Best for Async-First Teams
Twist is built around asynchronous communication, with threads as the primary unit rather than a live chat stream.
Philosophy: Conversations happen in organized threads with context, not in a fast-moving stream that creates FOMO and interruption culture.
Features:
- Thread-based conversations with full context
- No "always-on" pressure
- 1-month message history on free plan
- Clear channel and thread organization
Pricing: Free (1 month history). Unlimited: $5/user/month.
Best for: Remote-first teams that want to reduce notification overload and support deep work.
The Real Question: Do You Need Slack at All?
Many teams discover they can replace Slack entirely with:
- Email for important decisions and external communication
- GitHub/Linear/Jira for technical discussion tied to code and issues
- Notion/Confluence for documentation and decisions
- Short video calls for complex discussions
Fewer, better-structured communication channels often outperform a fast-moving Slack workspace.
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