Slack
Zoom
Slack
Zoom
Slack
Zoom
Slack
Zoom
Slack
Zoom
Slack
Zoom
No signals
Slack
No signals
Zoom
Slack
No signals
Zoom
Users: Unlimited users
Storage: 5GB total
Limits: No SSO, No compliance exports, No guest access controls, No custom retention policies, Cannot recover data after 1 year
Users: Minimum 3 users required
Storage: 10GB per user
Limits: No SSO/SAML, No data exports for compliance, No user provisioning, No audit logs
Users: Per user pricing
Storage: 20GB per user
Limits: No Enterprise Key Management, No HIPAA compliance, No unlimited workspaces, Cannot downgrade if you later upgrade to Grid
Users: Unlimited workspaces
Storage: 1TB per user
Limits: Annual commitment required, Cannot downgrade to Business+ ever, Multi-year contracts often required for discounts
Users: 1 host
Storage: None (local recording only)
Limits: 40-minute limit on group meetings, No cloud storage, No phone dial-in, Limited whiteboard
Users: 1-9 users
Storage: 5GB cloud recording
Limits: Still only 100 participants, 5GB storage runs out fast, No SSO
Users: 10+ users
Storage: 5GB cloud recording
Limits: 10-user minimum, Storage still limited to 5GB per user
Users: 10+ users
Storage: 10GB cloud recording
Limits: 10-user minimum, Metered outbound calling
Users: 250+ users required
Storage: Unlimited cloud recording
Limits: 250-user minimum, Custom pricing requires sales call
| Feature | Slack | Zoom |
|---|---|---|
| Communication | ||
| Real-time messaging Channels, DMs, threads | ||
| Video calls Huddles and integrations, up to 50 people on paid plans | ||
| Team chat Included in all plans | ||
| Phone system (Zoom Phone) Business Plus+ or add-on, metered calling | ||
| Core | ||
| Video conferencing HD video, up to 1000 participants on Enterprise | ||
| Unlimited meeting duration Free plan limited to 40 minutes | ||
| Collaboration | ||
| Screen sharing With annotation and remote control | ||
| Breakout rooms Excellent for workshops and training | ||
| Guest access Single-channel guests free, multi-channel count as paid users | ||
| Data | ||
| Message history Free: 90 days visible, 1 year then deleted. Paid: Unlimited | ||
| Data export Business+ and above for compliance exports | ||
| Integrations | ||
| Third-party integrations 2,600+ apps. Free plan limited to 10 integrations | ||
| Calendar integration Google, Outlook, others | ||
| Storage | ||
| Recording Local free, cloud limited (5-10GB) | ||
| Security | ||
| SSO/SAML Business+ and above only ($15/user) | ||
| End-to-end encryption Not available. EKM (customer keys) only on Enterprise+ | ||
| Waiting room Important for preventing Zoombombing | ||
| SSO Business plan and above | ||
| Usability | ||
| Virtual backgrounds CPU-intensive | ||
| Browser-only joining Guests can join without download | ||
| AI | ||
| Slack AI Separate $10/user add-on, must buy for ALL users | ||
| AI Companion Extra cost add-on | ||
| Accessibility | ||
| Mobile app iOS and Android, notification reliability issues | ||
| Events | ||
| Webinars Add-on or Enterprise only | ||
| Enterprise | ||
| Audit logs Enterprise+ only ($45/user) | ||
| Compliance | ||
| HIPAA compliance Enterprise+ only | ||
| FedRAMP authorized Moderate authorization available | ||
