Slack-to-Mattermost Migration

Make a smooth transition from Slack to self-hosted Mattermost with complete data migration, user training, and ongoing support. Eliminate per-user fees, gain complete data control, and meet compliance requirements—all while maintaining team productivity.

What’s Included

Pre-Migration Planning

• Current Slack environment assessment
• Migration scope definition and timeline
• User communication strategy
• Risk identification and mitigation plan
• Technical requirements review

Complete Data Migration

• Message History - Full import of all public and private channel messages
• Users & Profiles - User accounts and profiles
• Channels & Teams - Public channels, private channels, and team structure
• File Attachments - Documents, images, and all shared files
• Integrations - Assessment and recreation of key integrations
• Emoji & Reactions - Custom emoji and message reactions

Identity Integration

• SSO/SAML setup with your identity provider
• User mapping from Slack to Mattermost
• Email notification configuration

Training & Change Management

• Administrator training on Mattermost management
• End-user training sessions (live or recorded)
• Quick start guides and documentation
• FAQ document addressing common questions

Post-Migration Support

• Performance tuning and optimization
• Issue resolution during transition period
• User support during adjustment phase
• Integration troubleshooting
• Configuration refinements

Migration Process

Phase 1: Discovery & Planning

• Analyze your Slack workspace (subscription level, users, channels, integrations)
• Define migration scope and timeline

Phase 2: Test Migration

• Perform test migration with subset of data
• Validate data integrity and completeness
• Test integrations and workflows
• Refine migration process based on findings

Phase 3: Production Migration

• Execute full data migration
• Validate all content successfully migrated
• Conduct final testing

Phase 4: Transition & Support

• Go-live with user communication
• Provide training and onboarding
• Monitor system performance
• Address user questions and issues
• Optimize based on usage patterns

Why Migrate from Slack?

Data Sovereignty & Compliance

• Complete control over data location and storage
• Meet healthcare, financial, or defense compliance requirements
• Air-gapped deployment options for classified environments
• No third-party data access or AI training on your content

Enhanced Security

• Self-hosted on your infrastructure
• Full control over authentication and access
• Custom security policies and data retention
• Integration with your existing security tools

Customization & Extensibility

• Custom plugins and integrations
• Custom branding
• Tailored workflows with Playbooks and Boards
• API access for automation

Best For

Organizations that:

• Need data sovereignty or air-gapped deployment
• Have compliance requirements (healthcare, finance, defense)
• Require customization beyond Slack’s capabilities
• Want complete control over collaboration platform

Typical Results

• Seamless transition with minimal user disruption
• Complete data preservation - all history and files retained
• Improved security posture - data under your control
• Happy users - familiar interface with enhanced capabilities