Self-Hosted Scheduling Software: Cut Calendly's Per-Seat Fees
Run your booking system on your own servers, or use managed hosting to skip the DevOps. Five open-source tools compared.
Self-Hosted Scheduling: Control Over Lock-In
Self-hosted scheduling software runs on your infrastructure — or a managed host you choose — not on a SaaS vendor's servers. Your booking data stays in your database. You control backups, integrations, and exports.
Teams choose self-hosted when:
- Per-seat pricing locks you in. Calendly Teams: $16 per user per month. Ten people = $1,920 per year. Self-hosted often has one flat fee.
- GDPR or data residency is required. EU law demands data stays in the EU. Calendly doesn't offer EU servers in cheaper tiers. Cal.com Cloud charges $28 per user just for EU access.
- You need deep integrations. Self-hosted Cal.com connects to 100+ apps: Google Calendar, Outlook, Zoom, Slack, Stripe, HubSpot, Salesforce, Zapier, n8n.
- Vendor lock-in feels risky. Cal.com went closed source in April 2026. The open-source fork Cal.diy (47,000+ GitHub stars) lives on as a permanent backup.
But self-hosting has real costs: security patches, database scaling, backups, and uptime all fall on your team. Managed hosting handles that infrastructure work for you.
5 Self-Hosted Scheduling Tools Ranked
Cal.diy
47,000+ GitHub stars. Community-maintained open-source fork.
When Cal.com closed its source code in April 2026, the community forked it as Cal.diy. It remains fully open and has all Cal.com's features: 100+ integrations, round-robin scheduling, team event types, booking links, webhooks, white-label options, and mobile apps. Battle-tested, auditable, and actively maintained. Requires Docker, PostgreSQL, and ongoing security patching.
Cost: Free (DIY) or managed via Opsily. Scaling: You own database, server, backups. Best for: Teams with engineering resources; organizations needing full code transparency.
Easy!Appointments
Long-standing PHP-based open-source scheduler.
Simpler than Cal.com; built for solo consultants, salons, and small practices. REST API support. One-calendar focus; fewer integrations. Lightweight and straightforward to self-host. Supports recurring appointments and email reminders.
Cost: Free. Scaling: Database-backed; manual server management. Best for: Freelancers, service providers (dental, coaching, repairs).
LibreBooking
Community fork of phpScheduleIt with active development.
Open-source, lightweight, focused on appointment scheduling. Supports resource and room scheduling. Web-based interface, MySQL backend. Lower resource footprint than Cal.diy. Good for businesses that don't need complex team routing.
Cost: Free. Scaling: Modest resource needs; still requires patching and backups. Best for: Service businesses, education, teams managing office space or equipment.
Rallly
Group meeting scheduler and polling tool.
Lighter than Cal.com. Solves "when can we all meet?" without complex routing or payment processing. Simple deployment, minimal dependencies. Good for replacing Doodle.
Cost: Free. Scaling: Low resource footprint. Best for: Internal meeting coordination; quick scheduling for teams.
Seatsurfing
Open-source desk and room scheduling for hybrid teams.
Built for hybrid work: teams book desks, meeting rooms, parking spaces. Real-time availability, calendar sync, integrations with common calendar tools.
Cost: Free. Scaling: Docker-friendly; generally lightweight. Best for: Hybrid teams managing office space; resource planning.
Why Opsily's Managed Cal.com Wins vs Calendly
Cost, compliance, and control side-by-side.
Calendly pricing as of 2026. Opsily managed Cal.com; current pricing reflects selected plan.
Why Self-Hosted Scheduling Software on Opsily
All the control of self-hosting. All the reliability of managed infrastructure.
Flat pricing, unlimited growth
One monthly fee. Add team members, event types, or bookings without increasing your bill. Scale from 5 users to 500 without per-seat surprises.
EU GDPR by default
Servers in Germany. Data never leaves EU data centers. Automated daily backups. Encrypted at rest. No premium charges for compliance.
Managed security and updates
OS patches, database updates, SSL renewal, and security monitoring handled for you. You focus on bookings, not infrastructure.
Built for teams who need reliability
Secure, Compliant, Transparent
Your scheduling data deserves the same care as your contracts.
GDPR Compliant
EU data residency built in. Automatic deletion, data export, and audit logs — no extra configuration needed.
Secure German Servers
Your servers run in German data centers with multi-layer physical and logical security, backed by industry-standard infrastructure practices.
Daily Automated Backups
Encrypted backups tested and stored safely. One-click restore if anything goes wrong.
No Vendor Lock-In
Cal.com is open source. Export your data anytime. Full API access. The Cal.diy fork ensures you always have an alternative.
Simple, Transparent Pricing
All plans include EU German servers, daily backups, automatic security updates, and 100+ integrations. No per-seat fees. No surprises.
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Deploy Cal.com in 5 Minutes
From sign-up to first booking link: no infrastructure knowledge required.
Email and password. No credit card required. Choose your region (EU by default).
Select the plan that fits your team size. Opsily provisions your database, server, and SSL certificate automatically.
Link Google Calendar, Outlook, Apple Calendar, or Zoom. Set up Stripe for paid bookings if you need it.
Email and password. No credit card required. Choose your region (EU by default).
Select the plan that fits your team size. Opsily provisions your database, server, and SSL certificate automatically.
Link Google Calendar, Outlook, Apple Calendar, or Zoom. Set up Stripe for paid bookings if you need it.
Create your account
Email and password. No credit card required. Choose your region (EU by default).
Deploy Cal.com
Select the plan that fits your team size. Opsily provisions your database, server, and SSL certificate automatically.
Connect your calendars
Link Google Calendar, Outlook, Apple Calendar, or Zoom. Set up Stripe for paid bookings if you need it.
Share your booking link
Create your first event type. Generate a shareable booking link. Start accepting meetings in minutes.
Self-Hosted Scheduling: Common Questions
Everything teams ask before switching from Calendly.
Self-hosted scheduling software runs on your own servers or a managed host you control — not on a SaaS vendor's platform. Your booking data stays in your database. You own your backups, integrations, and data exports. Teams use it when per-seat pricing becomes expensive (Calendly Teams costs $16 per user per month), when GDPR requires data residency in the EU, or when they need 100+ integrations unavailable in standard SaaS tools.
Run your scheduling software on your own terms
No per-seat pricing. No vendor lock-in. Deploy on GDPR-compliant EU servers today.