Slack vs Rocket.Chat
Slack
Cloud-based SaaS team communication platform with 2,400+ integrations and 750,000+ active workspaces.
Mid-to-large enterprises, tech startups, and organizations that prioritize integrations and don't have strict data residency needs.
Rocket.Chat
Open-source, self-hosted team communication platform with unlimited message history and GDPR/HIPAA compliance options.
Privacy-conscious organizations, government agencies, healthcare providers, companies with strict GDPR/HIPAA needs, and budget-constrained teams willing to manage self-hosted infrastructure.
Short Answer
Slack is a cloud-hosted SaaS platform with 750,000+ active workspaces and superior integrations, while Rocket.Chat is an open-source, self-hosted alternative that costs 60-80% less and offers complete data control. Slack dominates enterprise adoption, but Rocket.Chat appeals to organizations prioritizing privacy and budget.
Our Verdict
AI-assistedChoose Slack if your organization prioritizes ease-of-use, extensive pre-built integrations, and industry-standard collaboration features with minimal setup. Choose Rocket.Chat if you need cost savings (60-80% cheaper), complete data ownership, unlimited message history on free plans, or compliance with strict data residency requirements (GDPR, HIPAA, government regulations).
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Choose Slack if
Mid-to-large enterprises, tech startups, and organizations that prioritize integrations and don't have strict data residency needs.
Choose Rocket.Chat if
Privacy-conscious organizations, government agencies, healthcare providers, companies with strict GDPR/HIPAA needs, and budget-constrained teams willing to manage self-hosted infrastructure.
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Key Differences at a Glance
Key Facts & Figures
| Metric | Slack | Rocket.Chat | Diff |
|---|---|---|---|
| Daily Active Users(millions) | ~38 Million | — | — |
| App Integrations(count) | 2,600+ | — | — |
| Paid Starting Price(USD/user/mo) | $7.25 | — | — |
| Standalone Monthly Pricing (Pro Tier)(USD per user per month) | $7.25 | — | — |
| Annual Cost per User (Pro Tier)(USD) | $87 (billed yearly) | — | — |
| Third-party App Integrations(integrations) | 2,000+ | — | — |
| Video Meeting Capacity(participants) | Up to 2,000 (with paid plan) | — | — |
| Mobile App Feature Parity(%) | 95% | — | — |
| Base Monthly Cost Per User(USD) | $8 | — | — |
| Free Tier Meeting Participant Limit(participants) | Unlimited (Slack Huddles for video limited to 50 participants) | — | — |
| Asynchronous Communication Strength(scale 1-5) | 5 out of 5 (core feature with channels, threads, and history) | — | — |
| Google Workspace Integration Level | 2 out of 5 (available via integration, not native) | — | — |
| AI Features Count (2026)(features) | 30+ (CRM tools, meeting summaries, automation, SlackBot enhancements) | — | — |
| Base Monthly Cost Per User(USD) | $7.25 | — | — |
| Business+ Tier Monthly Cost Per User(USD) | $12.50 | — | — |
| Available Integrations(integrations) | 2000+ | — | — |
| Price Stability (2024-2026)(months) | No increases for 33 months | — | — |
| Free Tier Cost(USD) | Free | — | — |
| Pro/Standard Monthly Cost(USD per user/month) | $7.25 | — | — |
| Third-party Integrations(integrations) | 2000+ | — | — |
| Minimum Monthly Cost Per User(USD) | $7.25 | — | — |
| Third-Party Integrations Available(count) | 2,000+ | — | — |
| Years Price Stable (2026)(months) | 33+ months | — | — |
| Native Integrations Available(count) | 2,200+ | — | — |
| Pro Plan Annual Cost(USD) | $150 (billed monthly) | — | — |
| Free Tier Message History Retention(days) | 90 days | — | — |
| AI Transcription Languages Supported(languages) | 0 (not native feature) | — | — |
| Enterprise Uptime SLA(percent) | 99.99% | — | — |
| User Workspace Limit (Free Tier)(workspaces) | 1 workspace | — | — |
| Maximum Meeting Participants (Free)(participants) | 3 participants | — | — |
| Pro Plan Monthly Cost (Annual Billing)(USD per user) | $8.75 | — | — |
| Available Integrations(count) | 2,000+ integrations | — | — |
| Monthly Cost (Pro Plan)(USD) | $12.50 per user/month | — | — |
| Free Message History(days) | 90 days maximum | — | — |
| Voice Audio Codec Quality(kHz) | 16 kHz | — | — |
| Third-Party Integrations(count) | 2,000+ official apps | — | — |
| Maximum Video Call Participants(people) | 15 participants | — | — |
| Total Registered Users(millions) | 750 million | — | — |
| Enterprise Plan Monthly Cost Per User(USD) | $12.50 | — | — |
| Free Plan Message History Retention(days) | 90 days | — | — |
| Third-Party Integrations Available(count) | 2,300+ integrations | — | — |
| Paid Plan Starting Price(USD/month) | $12.50 (Pro per-user) | — | — |
| Cloud Storage (Base Plan)(GB) | 10 GB | — | — |
| Monthly Cost per User(USD) | $8-12.50 (Pro/Business+) | — | — |
| Active Workspaces(workspaces) | 750,000+ | — | — |
| Native Integrations(count) | 2,300+ | — | — |
| Message History Searchable(years) | 10 years standard | — | — |
| Workflow Automation Steps(built-in steps) | 50+ | — | — |
| Native App Integrations Available(count) | 2,400+ apps | — | — |
| Monthly Cost (Pro Plan, 50 users)(USD) | $412.50/month | — | — |
| Message History Retention (Free Plan)(days) | 90 days (10,000 message limit) | — | — |
| Paid Workspaces/Users (Enterprise Adoption)(workspaces) | 750,000+ paid workspaces | — | — |
| Monthly Cost (10 Users, Annual)(USD) | $150/month ($1,800/year) | $25-50/month ($300-600/year) | +300% |
| Pre-built Integrations(integrations) | 2,400+ integrations | 400+ integrations | +500% |
| Message History on Free Plan(days) | 90-day limited access | Unlimited history | — |
| Active Global Workspaces/Deployments(count) | 750,000+ active workspaces | 20,000-30,000 deployments | +2900% |
| Uptime SLA Guarantee(percent) | 99.99% | Self-hosted (depends on setup) | — |
| Price Per User Per Month (Pro/Standard)(USD) | $12.50/user (Pro plan) | $5-7.50/user (managed cloud) | +100% |
All figures sourced from publicly available data. Last updated Jun 2026.
Key Differences
Slack
Cloud-only SaaS (hosted by Slack)
Rocket.Chat
Open-source with self-hosted & cloud options🏆
Slack
Limited to 90 days on Free; requires Pro for unlimited
Rocket.Chat
Unlimited message history on all plans🏆
Slack
$150 (Pro plan at $12.50/user/month)
Rocket.Chat
$0-50 (self-hosted free; managed cloud $25-50/month)🏆
Slack
2,400+ pre-built integrations🏆
Rocket.Chat
400+ integrations, API-extensible
Slack
750,000+ active workspaces globally🏆
Rocket.Chat
20,000-30,000 estimated deployments
Slack
Limited control; AWS-hosted in specific regions
Rocket.Chat
Full control; can deploy on-premises or private servers🏆
Slack
Unlimited users but 90-day message history
Rocket.Chat
Unlimited users and unlimited message history🏆
Full Comparison
| Attribute | Slack |  Rocket.Chat |
|---|---|---|
| Daily Active Users(millions) | ~38 Million | — |
| Monthly Active Users(millions) | 215 million | — |
| App Integrations(count) | 2,600+ | — |
| Google Workspace Native Integration | Limited (requires custom setup) | — |
| Native Integrations(count) | 2,300+ | — |
| Paid Starting Price(USD/user/mo) | $7.25 | — |
| Standalone Monthly Pricing (Pro Tier)(USD per user per month) | $7.25 | — |
| Annual Cost per User (Pro Tier)(USD) | $87 (billed yearly) | — |
| Base Monthly Cost Per User(USD) | $8 | — |
| Base Monthly Cost Per User(USD) | $7.25 | — |
| Business+ Tier Monthly Cost Per User(USD) | $12.50 | — |
Show 14 more attributesPrice Stability (2024-2026)(months) No increases for 33 months — Free Tier Cost(USD) Free — Pro/Standard Monthly Cost(USD per user/month) $7.25 — Minimum Monthly Cost Per User(USD) $7.25 — Years Price Stable (2026)(months) 33+ months — Pro Plan Annual Cost(USD) $150 (billed monthly) — Pro Plan Monthly Cost (Annual Billing)(USD per user) $8.75 — Monthly Cost (Pro Plan)(USD) $12.50 per user/month — Enterprise Plan Monthly Cost Per User(USD) $12.50 — Paid Plan Starting Price(USD/month) $12.50 (Pro per-user) — Monthly Cost per User(USD) $8-12.50 (Pro/Business+) — Monthly Cost (Pro Plan, 50 users)(USD) $412.50/month — Monthly Cost (10 Users, Annual)(USD) $150/month ($1,800/year) $25-50/month ($300-600/year) Price Per User Per Month (Pro/Standard)(USD) $12.50/user (Pro plan) $5-7.50/user (managed cloud) | ||
| Third-party App Integrations(integrations) | 2,000+ | — |
| Available Integrations(integrations) | 2000+ | — |
| Available Integrations(count) | 2,000+ integrations | — |
| Third-Party Integrations Available(count) | 2,300+ integrations | — |
| Pre-built Integrations(integrations) | 2,400+ integrations | 400+ integrations |
| Video Meeting Capacity(participants) | Up to 2,000 (with paid plan) | — |
| Native Office Integration | Limited (third-party connectors) | — |
| AI Copilot Features | Slack AI (summarization, search, assisted writing) | — |
| Free Tier Meeting Participant Limit(participants) | Unlimited (Slack Huddles for video limited to 50 participants) | — |
| Native Video Conferencing | Huddles for brief video, limited to 50 participants; requires external tool for full conferencing | — |
Show 12 more attributesMeeting Recording & Auto-Transcription Not native; requires integration with Otter.ai or similar third-party services — Asynchronous Communication Strength(scale 1-5) 5 out of 5 (core feature with channels, threads, and history) — Third-Party Integrations Available(count) 2,000+ — Enterprise AI Features Advanced AI assistant, smart summaries, automation — Native Integrations Available(count) 2,200+ — Free Message History(days) 90 days maximum — Free Plan Message History Retention(days) 90 days — Free Plan External Guest Collaboration(capacity) Unlimited external guests via workspace invite — Email Service Included No — Message History Searchable(years) 10 years standard — Workflow Automation Steps(built-in steps) 50+ — Message History on Free Plan(days) 90-day limited access Unlimited history | ||
| Message Search Speed(seconds) | Excellent - optimized search indexing | — |
| Voice Audio Codec Quality(kHz) | 16 kHz | — |
| Maximum Video Call Participants(people) | 15 participants | — |
| Mobile App Feature Parity(%) | 95% | — |
| Mobile App Type | Native iOS/Android with feature-parity | — |
| Google Workspace Integration Level | 2 out of 5 (available via integration, not native) | — |
| AI Features Count (2026)(features) | 30+ (CRM tools, meeting summaries, automation, SlackBot enhancements) | — |
| Deployment Options | Cloud-based SaaS only | — |
| GDPR & Data Sovereignty Compliance | Compliant but data on Salesforce servers | — |
| End-to-End Encryption Available | DMs only, Enterprise+ plan | — |
| End-to-End Encryption Default | Not available | — |
| Maximum Meeting Participants(participants) | Unlimited group chats | — |
| Third-party Integrations(integrations) | 2000+ | — |
| AI Features (2026) | Workflow automation, search enhancement | — |
| Real-Time Translation | Not available | — |
| Asynchronous Communication | Optimized with threads and archives | — |
| Zoom Rooms Cost(USD per room/month) | N/A | — |
| AI Assistant Capability | Slack AI (optional on paid plans) | — |
| AI Transcription Languages Supported(languages) | 0 (not native feature) | — |
| AI Meeting Assistant | Slack AI (search, summarization, drafting) | — |
| Workflow Automation Complexity | Advanced with conditional logic | — |
| Storage Per User (Standard Plan)(GB) | Variable by plan | — |
| Cloud Storage (Base Plan)(GB) | 10 GB | — |
| Open Source | No, proprietary | — |
| Maximum Video Length (Free Tier)(minutes) | N/A | — |
| Maximum Video Resolution(pixels) | Requires 3rd party | — |
| Free Tier Message History Retention(days) | 90 days | — |
| Message History Retention (Free Plan)(days) | 90 days (10,000 message limit) | — |
| Enterprise Uptime SLA(percent) | 99.99% | — |
| Uptime SLA Guarantee(percent) | 99.99% | Self-hosted (depends on setup) |
| User Workspace Limit (Free Tier)(workspaces) | 1 workspace | — |
| Maximum Meeting Participants (Free)(participants) | 3 participants | — |
| Maximum Meeting Participants (Paid)(participants) | Unlimited (slide deck view only) | — |
| Free Plan Message History(months) | 90 days | — |
| FedRAMP Authorization | No | — |
| SOC 2 Type II Certified | Yes | — |
| HIPAA Compliance Certified | Yes (Business+ plan required) | Yes (available) |
| Third-Party Integrations(count) | 2,000+ official apps | — |
| Custom Workflow Automation | Advanced (Workflow Builder, automations) | — |
| Users Per Workspace(count) | Unlimited | — |
| Total Registered Users(millions) | 750 million | — |
| Daily Posts Published (Organic)(millions) | N/A | — |
| Active Workspaces(workspaces) | 750,000+ | — |
| Threading Model | Channel-based threads (contextual loss in active channels) | — |
| Open Source(boolean) | Proprietary (closed-source) | — |
| Native Video/Audio Calls | Yes (Slack Huddles) | — |
| Native App Integrations Available(count) | 2,400+ apps | — |
| Self-Hosting Capability | No, cloud-only | — |
| Self-Hosted/On-Premises Option | No (cloud-only) | Yes (open-source) |
| Paid Workspaces/Users (Enterprise Adoption)(workspaces) | 750,000+ paid workspaces | — |
| Active Global Workspaces/Deployments(count) | 750,000+ active workspaces | 20,000-30,000 deployments |
| Source Code Availability(null) | Proprietary/closed | — |
Rocket.ChatShow 14 more attributes
Show 12 more attributes
Visual Comparison
Side-by-side comparison of numeric attributes
Pros & Cons
Slack
Pros
- 2,400+ pre-built integrations (Salesforce, Jira, GitHub, HubSpot, Zapier, etc.)
- Largest ecosystem with 750,000+ workspaces generating network effects
- Native mobile apps with offline messaging for iOS/Android
- Advanced AI-powered search with 99.99% uptime SLA
- Granular permission controls and enterprise single sign-on (SSO)
Cons
- Limited message history on Free plan (90 days); Pro plan required for unlimited
- Most expensive option at $12.50/user/month (Pro) or $15/user/month (Business+)
- No data residency control; relies on Slack's AWS infrastructure
Rocket.Chat
Pros
- Open-source codebase (fully auditable and customizable)
- Unlimited message history and users on all plans, including free
- Self-hosted deployment option eliminates data residency concerns
- 60-80% cost savings compared to Slack ($0 self-hosted, or $25-50/month managed cloud)
- HIPAA, GDPR, SOC 2 compliant; suitable for healthcare and finance
Cons
- Only 400+ integrations vs Slack's 2,400+; requires custom development for advanced use cases
- Smaller ecosystem (20,000-30,000 deployments vs Slack's 750,000 workspaces)
- Self-hosting requires IT expertise for maintenance, security patches, and upgrades
Frequently Asked Questions
No, Slack is cloud-only and cannot be self-hosted. Rocket.Chat is fully open-source and can be deployed on-premises, on private clouds (AWS, Azure, GCP), or on Rocket.Chat's managed cloud service. Self-hosting Rocket.Chat requires IT resources but eliminates cloud hosting costs.
Resources & Learn More
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Where to Buy
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