8 Slack Alternatives Ranked by Cost: From Free to Enterprise (2026)
Honest, vendor-neutral comparison of every major Slack alternative with per-user cost tables and specific use-case recommendations.
Quick Comparison
| Alternative | Free plan | Paid from | Best for |
|---|---|---|---|
| Microsoft Teams | Yes (limited) | From $4/user/mo | M365 shops |
| Google Chat | With Workspace | From $7/user/mo (Workspace) | Google Workspace users |
| Discord | Yes (full features) | Nitro: $9.99/mo (optional) | Startups, communities, gaming |
| Pumble | Yes (unlimited users) | From $2.49/user/mo | Budget-conscious teams |
| Chanty | Yes (up to 5 users) | From $3/user/mo | Small teams wanting simplicity |
| Mattermost | Yes (self-hosted) | From $10/user/mo (cloud) | Self-hosted/security-focused teams |
| Rocket.Chat | Yes (self-hosted) | From $7/user/mo (cloud) | Regulated industries, government |
| Element (Matrix) | Yes (self-hosted) | From $5/user/mo (cloud) | Privacy-focused organisations |
Detailed Breakdown
Microsoft Teams
Pros: Included with M365, 300-person video calls, deep SharePoint/OneDrive integration
Cons: Heavier desktop app, fewer third-party integrations (700+ vs 2,600+), Copilot costs extra
Google Chat
Pros: Deep Drive/Docs integration, Gemini AI included, clean interface
Cons: Fewer integrations, less mature channel system, requires Workspace subscription
Discord
Pros: Unlimited message history free, excellent voice channels, rich community features
Cons: No business compliance, perceived as gaming platform, limited enterprise features
Pumble
Pros: Unlimited message history on free plan, Slack-like interface, video calls, affordable paid plans
Cons: Smaller integration ecosystem, less mature than Slack, fewer automation features
Chanty
Pros: Built-in task management, clean interface, affordable, unlimited message history
Cons: 5-user free limit, fewer integrations, limited enterprise features
Mattermost
Pros: Open source, self-hosted option, full data control, strong security
Cons: Requires technical expertise to self-host, more expensive cloud option, smaller community
Rocket.Chat
Pros: Open source, on-premise deployment, air-gapped support, strong compliance
Cons: Complex setup, steep learning curve, fewer integrations than Slack
Element (Matrix)
Pros: End-to-end encryption, decentralised protocol, open source, federated messaging
Cons: Complex architecture, smaller user base, fewer integrations, steeper learning curve
Annual Cost by Team Size
| Tool | 10 users | 50 users | 100 users | 200 users |
|---|---|---|---|---|
| Slack Pro | $870 | $4,350 | $8,700 | $17,400 |
| Teams (standalone) | $480 | $2,400 | $4,800 | $9,600 |
| Teams (with M365) | Free | Free | Free | Free |
| Google Chat (Workspace) | $840 | $4,200 | $8,400 | $16,800 |
| Discord | Free | Free | Free | Free |
| Pumble (free) | Free | Free | Free | Free |
| Pumble (paid) | $299 | $1,494 | $2,988 | $5,976 |
Annual costs based on annual billing. Slack Pro at $7.25/user/mo annual rate.
Migration Considerations
Before switching from Slack, consider what you lose:
- Message history: Slack exports are JSON format and require processing. Not all alternatives can import Slack history.
- Integrations: Any Workflow Builder automations, custom bots, and app integrations will need to be rebuilt.
- Slack Connect: External collaboration channels with partners and clients will be lost.
- Productivity dip: Expect 2 to 4 weeks of reduced productivity during migration for a 100-person team.
- Training cost: Factor in time for team training on the new platform, especially for non-technical users.
Frequently Asked Questions
What is the best free alternative to Slack?
For unlimited message history with no user cap, Pumble is the strongest free alternative. Discord offers excellent free features including voice channels and unlimited history, but lacks business compliance features. If you already have Google Workspace, Google Chat is included. The best choice depends on whether you need business features (Pumble), community features (Discord), or Google integration (Chat).
What do I lose by leaving Slack?
The main losses are: Slack's 2,600+ integration ecosystem (most alternatives have far fewer), Workflow Builder automations that you have built, Slack Connect channels with external partners, and message history that may not export cleanly. Slack allows workspace data export, but the format is JSON and requires processing. Factor in 2 to 4 weeks of productivity loss during migration for a 100-person team.
Is Discord suitable for business use?
Discord works well for startups, creative teams, and developer communities. It offers unlimited message history, excellent voice channels, and rich community features for free. However, it lacks SSO, compliance data exports, DLP, and enterprise security features. It also carries a gaming/community perception that may not suit corporate environments. Consider Discord if you are under 50 users and do not need compliance features.
Should I self-host Mattermost or Rocket.Chat?
Self-hosting gives you complete data control and eliminates per-user SaaS fees, but requires server infrastructure, maintenance, backups, security patching, and technical expertise. The TCO of self-hosting often exceeds cloud pricing once you factor in DevOps time. Self-hosting makes sense if you have strict data sovereignty requirements (government, defence, healthcare) or if you already have DevOps capacity.