The Open-Source Alternative to Calendly

Enterprise-grade meeting scheduling platform built with Elixir & Phoenix LiveView

🚀 Try Cloud Version · 📖 Documentation · 🐛 Report Bug

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🎯 Why Choose Tymeslot?

🔓 Open Source (ELv2) Fork, audit, contribute—or just use it. No vendor lock-in, ever.	🏠 Your Data, Your Rules Self-host on Docker/Cloudron or use our managed cloud.
🆓 Full-Featured Free Tier Everything you need to get started. Forever. No credit card required.	🔒 Privacy-First No tracking pixels, no data mining, no selling your data.
🎨 Professional Templates Responsive email designs with calendar attachments.	⚡ Built for Performance Real-time updates with Phoenix LiveView. Blazing fast.

🔌 Integrations

Calendar Providers (6)

Google Calendar	Outlook	CalDAV
Nextcloud	Radicale	Zimbra

Video Conferencing (5)

Google Meet	Microsoft Teams	MiroTalk P2P
In-Person / Phone	Custom Links

💰 Simple, Transparent Pricing

🆓 Free Forever Self-Hosted or Cloud ✅ Unlimited bookings & meeting types ✅ All 6 calendar providers ✅ All 5 video platforms ✅ Multi-language (EN, DE, UK) ✅ Webhooks & embedding ✅ Advanced reminders ✅ Community support Perfect for: Individuals, small teams, self-hosters

⭐ Pro Tier €5/month · Cloud Only ✅ Everything in Free ✅ Priority support ✅ Support open-source development ✅ Early access to new features Perfect for: Professional businesses, agencies Get Started →

Self-Hosting: Always free. Deploy on Docker, Cloudron, or bare metal—no licensing fees, ever.

✨ Feature Highlights

🔐 Authentication & Users Multi-provider OAuth (Google, GitHub) Email/password with verification Customizable profiles & avatars 4-step onboarding flow	🧠 Smart Scheduling 90+ timezone-aware cities Custom business hours & breaks Real-time conflict detection Configurable meeting types
📅 Calendar Sync 6 calendar providers Full CRUD operations Auto token refresh Calendar discovery	🎥 Video Conferencing 5 video providers Auto room creation Role-based access OAuth integration
📧 Email System Professional templates (MJML) 5 notification types Calendar attachments Delivery tracking	🔒 Security Rate limiting AES encryption XSS protection Circuit breakers
🌍 Internationalization 3 languages (EN, DE, UK) Auto browser detection Localized booking pages DST handling	🔗 Embedding Secure iframe widgets Domain restrictions Webhook notifications Customizable pages
⏰ Reminders Unlimited per meeting Flexible timing Email notifications Automatic retry

📸 Screenshots

Dashboard & Management	Availability & Scheduling
Embedded Booking Widget

🆚 Tymeslot vs Calendly

Feature	Tymeslot	Calendly
Open Source	✅ Yes	❌ No
Self-Hosting	✅ Free Forever	❌ Not Available
Data Privacy	✅ Your Infrastructure	❌ Their Servers
Unlimited Bookings	✅ Free Tier	❌ Paid Only
Calendar Providers	6 Providers	3 Providers
Video Providers	5 Providers	3 Providers
Multi-Language	✅ 3 Languages	✅ Multiple
Webhooks	✅ Free Tier	❌ Paid Only
Embedding	✅ Free Tier	✅ Available

💼 Perfect For

👨‍💼 Freelancers & Consultants Replace endless email chains with professional booking pages	🏢 Small Businesses Coordinate team availability without enterprise pricing
🔒 Privacy-Conscious Orgs Keep scheduling data on your own infrastructure	🌍 International Teams Multi-language support for global customer bases
💻 Developers & Tech Teams Extensible platform with webhook integrations	📖 Open Source Projects Embed booking widgets in your documentation

🛠️ Built With

Backend: Elixir 1.19 · Phoenix 1.8 · Phoenix LiveView 1.1 · Oban Database: PostgreSQL 14+ · Ecto SQL Frontend: Tailwind CSS · ESBuild · Alpine.js Email: Swoosh · MJML Templates Infrastructure: Docker · Cloudron Ready

🚀 Getting Started

☁️ Cloud Try Now → Zero setup · Start in 60 seconds	🐳 Docker Guide → Self-hosting · Full control
📦 Cloudron Guide → One-click install · Managed platform	💻 Development Docs → Local setup · Contribute code

🐳 Quick Start (Docker Image)

If you already have Docker installed, you can pull and run the image in one step:

docker run --name tymeslot \
  -p 4000:4000 \
  -e SECRET_KEY_BASE="$(openssl rand -base64 64 | tr -d '\n')" \
  -e PHX_HOST=localhost \
  -v tymeslot_data:/app/data \
  -v tymeslot_pg:/var/lib/postgresql/data \
  youruser/tymeslot:latest

This command pulls the image automatically if it is not present locally. For a full Docker guide, see README-Docker.md.

🤝 Contributing

⭐ Star Star Repo → Help others discover Tymeslot	💰 Support Subscribe → Fund open-source development
🐛 Report Open Issue → Bugs & feature requests	💻 Code Guidelines → Development setup & PR process

🛡️ Security

Built-in Protection ✅ Input sanitization & XSS protection ✅ AES encryption for credentials ✅ Rate limiting & IP protection ✅ Security headers (CSP, HSTS, CSRF) ✅ Spam protection (honeypot + reCAPTCHA v3) ✅ Regular dependency updates

Spam Protection Protect signup and booking forms from bots: Honeypot: Invisible field catches automated bots reCAPTCHA v3: Google's invisible bot detection (optional) Enable in your environment: export RECAPTCHA_SITE_KEY="your_key" export RECAPTCHA_SECRET_KEY="your_secret" export RECAPTCHA_SIGNUP_ENABLED="true" export RECAPTCHA_BOOKING_ENABLED="true" Get keys at Google reCAPTCHA Report Vulnerabilities Use our contact page for security issues.

📄 License

This project is licensed under the Elastic License 2.0 - see the LICENSE file for details.

🏢 About

Tymeslot is developed by:

• Luka Karsten Breitig
• Diletta Luna OÜ
• Sepapaja 6, 15551 Tallinn, Estonia

💬 Community & Support

• 💬 Join Discussions - Get help from the community
• 🐛 Report Bugs - Help us improve
• 💡 Request Features - Share your ideas
• 📧 Contact Us - Business inquiries
• ⭐ Star on GitHub - Show your support

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Built with ❤️ using Elixir, Phoenix, and LiveView

Made by Luka Karsten Breitig · Diletta Luna OÜ · Tallinn, Estonia