Mattermost vs. Rocket.Chat: A rocket chat discord alternative for teams
Tired of Slack's per-user fees and Discord's lack of business features? Compare three open-source alternatives and see why Mattermost plus Opsily's managed EU hosting wins for regulated industries and cost-conscious teams.
Why Opsily for Managed Mattermost
Mattermost is the best open-source Rocket Chat Discord alternative, but self-hosting requires DevOps overhead: database tuning, SSL renewal, backup verification, and 24/7 monitoring. Opsily removes that burden.
EU Data Residency, GDPR Built In
Your data lives in German data centers certified to ISO 27001. Opsily holds a signed Data Processing Agreement. No US cloud. No data transfer surprises. Teams in healthcare, finance, and critical infrastructure trust this setup.
One Flat Price. No Per-Seat Madness.
Slack charges €6.75 to €18 per user per month. Mattermost via Opsily is fixed: add 10 people or 100, your bill stays the same. Predictable budgets. No negotiation with vendors.
Automated Updates, Daily Backups, 24/7 Monitoring
We handle the plumbing: security patches roll out overnight, your data backs up every 24 hours, and our team watches the logs so you don't. Focus on your work, not your infrastructure.
Built for teams who need reliability
Why Teams Leave Slack, Discord, and Rocket.Chat
Slack and Discord lock you in hard. Slack stores message history as a commodity, your 90-day history is gone in Enterprise. Discord was designed for gaming communities, not teams that need audit logs, compliance, and structured workflows.
Rocket.Chat is open-source and self-hosted, which is good. But it's enterprise-focused with custom pricing. The comparison is really this: Rocket.Chat requires a sales call. Mattermost is transparent.
Then there's the cost ceiling. A 20-person team on Slack Pro pays €135 to €360 per month (at €6.75 to €18 per user). The same team on Opsily's managed Mattermost: one flat rate. It scales.
Add in EU data residency, GDPR compliance out of the box, and the ability to run integrations (GitHub, GitLab, Jira, Jenkins) without vendor blessing, and Mattermost becomes the obvious choice for distributed teams in regulated industries.
Mattermost vs. Rocket.Chat: Head to Head
A direct look at the two leading open-source chat platforms.
Pricing as of September 2026. Rocket.Chat Enterprise requires direct sales contact. Mattermost Professional and Enterprise plans also have custom pricing.
Get Started with Opsily's Managed Mattermost in 4 Steps
From signup to first message in under 30 minutes.
Email + password. No credit card. Free trial includes one month of service.
Pick from Germany, Netherlands, Finland, or UK. Your data never leaves that region.
Click 'Deploy'. We provision the VM, configure the database, and issue your SSL certificate. You get a live URL.
Email + password. No credit card. Free trial includes one month of service.
Pick from Germany, Netherlands, Finland, or UK. Your data never leaves that region.
Click 'Deploy'. We provision the VM, configure the database, and issue your SSL certificate. You get a live URL.
Create Your Account (1 min)
Email + password. No credit card. Free trial includes one month of service.
Choose Your EU Region (1 min)
Pick from Germany, Netherlands, Finland, or UK. Your data never leaves that region.
Deploy Your Mattermost Instance (5 min)
Click 'Deploy'. We provision the VM, configure the database, and issue your SSL certificate. You get a live URL.
Invite Your Team (Ongoing)
Send invite links, or connect SAML/OpenID for bulk provisioning. Your team starts using Mattermost today.
Potential annual savings for a 20-person team
Slack Pro at €6.75/user/month costs €1,620/year. Opsily's managed Mattermost flat rate covers the entire team.
Calculate your savingsEverything Included in Your Plan
Opsily manages the infrastructure so you manage your team. Every plan comes with the same set of capabilities.
Trust & Compliance
Built for teams that need to prove data stewardship.
GDPR Compliant
Data Processing Agreement signed. Audit logging enabled by default. Data lives in EU data centers only.
Secure European Infrastructure
Your Mattermost runs on enterprise-grade European data centers. Encryption at rest and in transit.
Automated Daily Backups
Encrypted, redundant backups stored in your chosen EU region. Restore capability verified weekly.
24/7 Security Monitoring
Our SOC team monitors your infrastructure around the clock. Real-time alerts and incident response.
Simple, Transparent Pricing
One flat rate. No per-user surprises. All plans include daily backups, EU data residency, 24/7 monitoring, and automatic updates.
Loading pricing...
Frequently Asked Questions
Answers to common questions about Mattermost, Opsily, and why this combination works.
Both are open-source, self-hosted chat platforms. Mattermost is channel-centric with enterprise features like Playbooks (incident response automation) and Boards (Kanban-style project management). Rocket.Chat targets government and large enterprises with custom pricing and compliance features. For SMBs, Mattermost is simpler to deploy and manage. Opsily's managed hosting removes the infrastructure burden for both, but Mattermost's transparent pricing (€9–30/month flat) beats Rocket.Chat's 'contact sales' model. If you're coming from Slack, Mattermost's interface will feel more familiar.
Stop Paying Per-User Fees for Team Chat
Mattermost plus Opsily's managed EU hosting gives you Slack's features, Discord's openness, and control over your data. No credit card to start. Free trial. 99.9% uptime SLA.