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Cal.com vs Mattermost: Pricing Comparison 2026

Side-by-side pricing comparison of Cal.com and Mattermost. See all plans, features, and costs at a glance.

Bottom line: Both Cal.com and Mattermost offer free plans. Cal.com has 4 pricing tiers while Mattermost has 4.

Last updated: March 16, 2026

Data compiled by Arthur Jacquemin
Updated March 16, 2026
Try Cal.com freeTry Mattermost free

Cal.com vs Mattermost: Quick Pricing Facts

FeatureCal.comMattermost
Starting Price$12/moCustom pricing
Number of Plans44
Free TierYesYes
Pricing Modelopen-sourceopen-source
Annual DiscountN/AN/A

Cal.com and Mattermost are both priced at $12/mo, making them equally accessible Communication tools. Together they offer 8 pricing plans with 65 features compared, so the best choice comes down to which features match your needs.

Both tools offer free plans, making them accessible for teams on a budget.

Review the detailed tier-by-tier comparison above to see exactly which features are included at each price point and find the best fit for your Communication needs.

Pricing Plans
Cal.com
Mattermost
Mattermost
Try it free
Tier 1
Individuals
$0/monthCheapest
Includes
  • 1 user
  • Unlimited event types & calendars
  • Email & SMS notifications
  • Integrate with 100+ apps
  • Mobile App
  • Browser Extension
  • Accept Stripe & PayPal payments
  • Two-way Salesforce & HubSpot sync
  • 1-click import Calendly events
Start with Individuals
Free
$0/monthCheapest
Includes
  • Limited-use edition of Enterprise Advanced for technical evaluation
Start with Free
Tier 2
Teams
$12/monthCheapest
Includes
  • Schedule accross 1 team
  • Round-robin scheduling
  • Managed & collective event types
  • Recurring events
  • Customizable email & SMS notifications
  • Remove Cal.com branding
  • Routing forms
  • Booking analytics
  • Custom APIs
Start with Teams
Professional
Custom pricing
Includes
  • Channel-based collaboration
  • Messaging, file sharing, and link and file previews across device platforms
  • 1:1 audio calls and screen sharing
  • Threaded discussions
  • Core search up to 3 million posts
  • Custom branding, themes, and emojis
  • Multi-team collaboration
  • Guest accounts
  • Single sign-on
  • Professional Support
Start with Professional
Tier 3
Organizations
$28/monthCheapest
Includes
  • Unlimited sub-teams
  • Route by custom variables
  • Company subdomain (yourcompany.cal.com)
  • SAML SSO and SCIM
  • SOC 2, HIPAA, ISO 27001 compliance check
  • Instant meetings
  • Domain-wide-delegation
  • Role-based permissions
  • Additional APIs
Start with Organizations
Enterprise
Custom pricing
Includes
  • Everything in Professional, Plus:
  • Agentic Platform
  • Real-time channel briefing
  • AI-enhanced Search and RAG
  • Video Integrations
  • Federated Communications
  • Workflow automation
  • Compliance export and eDiscovery automation
  • Scale to 50,000 concurrent users
  • Enterprise Support
  • U.S. Based Premier Support
Start with Enterprise
Tier 4
Enterprise
Custom pricing
Includes
  • Dedicated onboarding and engineering support
  • SLA & uptime guarantees
  • HRIS & directory integrations
  • Priority Slack & account support
  • Dedicated database
Start with Enterprise
Enterprise Advanced
Custom pricing
Includes
  • Everything in Enterprise, Plus:
  • Security-Optimized Mobility
  • Mobile Data-at-Rest Encryption
  • Zero Trust Security
  • Dynamic Attribute Based Access Controls
  • Automatic channel translations
  • Scale to 200,000 concurrent users
  • Dedicated write-through caching
  • Air-gapped Deployment
  • Mobile Screenshot Prevention
  • Mission Partner Environments
Start with Enterprise Advanced

Swipe to compare plans →

Cal.com

Open-source scheduling infrastructure for everyone

View all Cal.com plans

Mattermost

Open-source self-hosted team messaging platform

View all Mattermost plans
Our Pick

Mattermost

Mattermost offers a free plan.

Based on pricing data only. Review the full comparison below for your specific needs.

Best value: Mattermost

Try Mattermost free

Which Should You Choose?

Choose Cal.com if:

  • •You prefer Cal.com's free tier features—1 user, Unlimited event types & calendars
  • •You prioritize Cal.com's user experience and interface over price (both tools are similarly priced)
  • •Cal.com's 4-tier open-source structure gives clearer cost visibility for budget planning

Choose Mattermost if:

  • •You prefer Mattermost's free tier features—Limited-use edition of Enterprise Advanced for technical evaluation
  • •You want more features built-in—Mattermost offers 1 additional features across its plans
  • •You prioritize Mattermost's user experience and interface over price (both tools are similarly priced)

Both Cal.com and Mattermost offer free plans [1], eliminating cost barriers for evaluation. This means you can test both tools thoroughly with your actual workflows before any financial commitment. The free tiers differ in scope: Cal.com includes 9 features, while Mattermost includes 1 features. Evaluate which free tier matches your evaluation needs before deciding to upgrade. Your best approach is to activate both free trials and evaluate which tool's workflow, integrations, and user experience align better with your team's needs before committing to paid plans.

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Frequently Asked Questions: Cal.com vs Mattermost

How many pricing plans does Cal.com have vs Mattermost?
Cal.com offers 4 pricing plans, while Mattermost offers 4 plans. More plans typically means more flexibility to match your exact needs and budget.
Does Cal.com or Mattermost offer a free plan?
Yes, both Cal.com and Mattermost offer free plans. Compare the feature limits of each free tier to see which better fits your use case before upgrading.
Does Cal.com or Mattermost offer custom enterprise pricing?
Yes, both Cal.com and Mattermost offer custom enterprise pricing tiers with quote-based pricing. Contact each vendor for a tailored quote.
How do Cal.com and Mattermost compare for Communication?
Both Cal.com and Mattermost are Communication tools. Cal.com offers 4 plans starting at $12/mo, while Mattermost offers 4 plans starting at Custom pricing. Review the feature breakdowns above to see which better fits your Communication needs.

Sources

  1. Cal.com Official Pricing— Vendor pricing page
  2. Mattermost Official Pricing— Vendor pricing page

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