Cal.com vs Cal.diy: Cloud convenience or open-source control?
Both schedule meetings. Only one manages your infrastructure. We show you the real tradeoffs: features, costs, maintenance burden, and lock-in risk.
The April 2026 split
Cal.com (the company) moved their production code behind a commercial, closed-source license in April 2026. They continued supporting an open-source community edition: Cal.diy.
Both platforms run the same core scheduling engine. The difference is everything else.
Cal.com is the commercial SaaS product. Cloud-hosted. Managed infrastructure. Team features. SSO. Workflows. Premium support. Monthly subscription per user.
Cal.diy is the community-maintained MIT fork. Self-hosted on your server. Feature parity with Cal.com's Individual plan (one user). No teams or organizations. No paid support. No vendor lock-in. Free software, but you own infrastructure costs and maintenance.
Neither is "wrong." Both solve the same problem. The choice depends on your priorities: convenience, cost, control, and who carries the burden.
Head-to-head comparison
| Feature | Cal.com | Cal.diy |
|---|---|---|
| Hosting model | Cloud (Cal.com managed) | Self-hosted (your server) |
| License | Closed-source commercial | MIT open-source |
| Software cost | Free tier → $12-28/user/mo | Free |
| Infrastructure cost | Included in subscription | Your responsibility |
| Team features (Teams, Organizations) | Yes (all plans) | Removed |
| Workflows & routing forms | Yes (Teams+ plans) | Removed |
| SSO / SAML authentication | Yes (Organizations+) | Removed |
| Analytics dashboards | Yes (Teams+ plans) | Removed |
| Maintenance & updates | Cal.com handles it | You handle it |
| Official support SLA | Available (Enterprise plan) | Community-only support |
| Data residency options | US or EU cloud | Your choice of server location |
| Integration count | 100+ apps | 100+ apps (same core integrations) |
What to know: Cal.diy has all the features of Cal.com's Individual plan (basic one-user scheduling, integrations, custom branding). It lacks everything built for team collaboration, automation at scale, and enterprise security. If you need teams or complex workflows, Cal.diy is not an option.
Cal.com pricing (cloud SaaS)
Individual: Free for one user (basic features, no team access) Teams: $12 per user/month (round-robin, routing, analytics) Organizations: $28 per user/month (SSO, SCIM, SAML, role-based access, SLA guarantees) Enterprise: Custom pricing (dedicated support, uptime guarantees, HRIS integrations)
Billed annually = 25% discount (so $9/user/mo or $21/user/mo if paid yearly).
Total for a 3-person team on Teams plan: $36/month ($27/mo annual).
Cal.diy total cost of ownership (self-hosted)
Software license: Free Infrastructure options:
- AWS t3.small VPS: $20-40/month
- DigitalOcean VPS: $6-15/month
- Railway: $5-20/month (scales with usage)
- Render: $7-25/month (scales with usage)
- Managed PostgreSQL database: $5-15/month
- Domain and SSL: $1-5/month
Total baseline: $30-50/month for a working setup.
Hidden costs (your time):
- Initial deployment: 5-15 hours
- Monthly maintenance (updates, backups, monitoring): 2-5 hours
- Troubleshooting: 1-3 hours/month on average
- At $50/hour labor rate: $150-300/month in your time
Real TCO for Cal.diy: $180-350/month when you factor in labor, not $30-50.
The break-even point
For a 3-person team:
- Cal.com Teams: $27-36/month
- Cal.diy self-hosted: $30-50/month infrastructure + ~$150/mo labor = $180-200/month
If you're a solo hobbyist or developer who enjoys infrastructure work, Cal.diy is cheaper. For any business team, Cal.com's subscription is cheaper than your time managing Cal.diy.
What Cal.diy dropped (and why it matters)
Cal.diy removed: Teams, Organizations, Workflows, routing forms, SSO/SAML, analytics dashboards, and official support SLAs. These features exist because teams need coordination, security, and visibility. If you need any of them, Cal.com is required.
What running Cal.diy actually requires
Cal.diy is MIT-licensed and 100% open-source. You get complete data ownership, no vendor lock-in, and full transparency. You also get full responsibility.
Server: AWS, DigitalOcean, Hetzner, Linode, Render, Railway, Vercel, or any Linux VPS. You choose, you pay, you manage.
Database: PostgreSQL (required). Options: managed service (easier, costs more) or self-managed on the VPS (cheaper, requires backup knowledge).
Docker: Strongly recommended. Simplifies deployment and updates dramatically. Not required, but worth learning.
Node.js: Cal.diy runs on Node.js 18+. You need to manage versions, package updates, and environment variables.
Your ongoing responsibilities:
- Provisioning and networking the server (VPS setup, firewall rules)
- Installing and hardening PostgreSQL (or configuring managed Postgres)
- Setting up Docker and deploying the Cal.diy container
- SSL/TLS certificates (free via Let's Encrypt, but you set up renewal)
- Daily or weekly backups and recovery testing
- Security patching (OS, Node, dependencies, PostgreSQL)
- Monitoring uptime and error logs
- Upgrading Cal.diy when new releases come out (manual process)
- Scaling infrastructure if traffic grows
For a solo developer or internal hobby project, this is a weekend. For a production business calendar, it's a part-time ops job. For a growing team, it's a full-time burden.
When to choose Cal.com
You want teams to collaborate, or you need automation beyond basic integrations. Cal.com handles infrastructure, backups, scaling, and security. You focus on scheduling. Predictable monthly cost. Official support. Enterprise-grade SLAs available.
When to choose Cal.diy
Data residency is non-negotiable (compliance, privacy, or regulatory reasons). You have infrastructure skills or enjoy ops work. You want to avoid per-user subscriptions as your team grows. You're willing to manage updates, backups, and security patches.
When to choose managed Cal.diy (Opsily)
You want open-source software and data ownership, but not the ops burden. You need backups, security patching, and monitoring handled. You prefer transparent pricing (flat monthly, not per-user). You want EU data residency without managing your own VPS. You get the best of both: open-source transparency and managed-service convenience.
Managed Cal.diy hosting: Open-source without ops burden
Opsily offers managed Cal.diy hosting. You get data ownership, open-source transparency, and EU hosting. We handle infrastructure, backups, security, and scaling.
Automated daily backups and recovery
Encrypted backups every 24 hours. If something breaks, we restore in minutes. You never manage database snapshots, recovery testing, or disaster plans. Your data is protected, and recovery is instant.
Security patching on your schedule
Operating system, PostgreSQL, Node.js, and Cal.diy updates. We test patches in staging before deploying. You stay secure without learning sysadmin. One-click upgrades to new Cal.diy releases.
EU data residency built-in
Your data lives in German ISO 27001-certified data centers. No US cloud. No vendor lock-in. Transparent hosting without hidden infrastructure costs. You own your data from day one.
Built for teams who need reliability
Managed Cal.diy hosting on Opsily
One transparent price. Everything included. Scale from solo user to team without per-user surcharges.
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Questions about Cal.com vs Cal.diy
Cal.com's data export tools let you export calendars and event bookings. However, team configurations, custom workflows, and routing forms don't transfer because Cal.diy doesn't support them. You would need to manually recreate team structures and integration settings in Cal.diy. This is technically possible but requires manual setup work.
Ready to decide?
Cal.com's cloud hosting is perfect for teams who value convenience and don't want to manage infrastructure. Cal.diy is right for developers prioritizing data ownership and infrastructure control. And Opsily offers managed Cal.diy hosting if you want open-source without the ops burden.