4 Best Open Source Calendly Alternatives
A curated collection of the 4 best open source and self-hosted alternatives to Calendly in 2026.
Looking for a free, privacy-friendly, or self-hosted replacement for Calendly in 2026? The top open-source alternative is Cal.com — Fully customizable scheduling software for meetings.
Other highly rated open-source Calendly alternatives include Rallly, Easy!Appointments and Pearl.
Fully customizable scheduling software for meetings
Cal.com is a fully customizable scheduling software designed for individuals, businesses, and developers. It simplifies appointment booking with cross-calendar sync, custom booking links, automated reminders, and built-in video conferencing. - Cross-calendar sync: Automatically checks availability across multiple calendars to prevent double bookings. - Custom booking links: Create short, memorable links for easy sharing (e.g., cal.com/yourname). - Automated reminders: Send SMS or email reminders to reduce no-shows. - Built-in video conferencing: Cal Video provides seamless in-house video meetings. - Payment integration: Monetize bookings with Stripe integration. - Privacy-first design: Prioritizes data protection and security. - Multi-language support: Available in 65+ languages for global accessibility. - Embeddable booking: Easily integrate booking pages into websites or apps. - Buffer and limits: Set daily/weekly/monthly booking limits and add buffers around events. Cal.com is open-source and can be self-hosted for full control over data and infrastructure. The project is built with modern web technologies and supports deployment on various cloud platforms or on-premise servers. Self-hosting documentation is available in the cal.diy repository.
Free group meeting scheduling without logins
Rallly is the fastest and easiest way to schedule group meetings. Create a poll with proposed times, share a link, and let participants vote without needing an account. The tool automatically adjusts times for different time zones and shows the best option at a glance. - Instant Poll Creation: Set up a meeting poll in under a minute with no account required - Time Zone Support: Automatically converts times to each participant's local time zone - No Login for Voters: Participants can vote without signing up - Free Plan: 99% of users use Rallly completely free with no participant limits - Pro Features: Optional paid subscription for branding, permanent polls, and email notifications - Privacy Focused: Open source with no ads, no data selling, and automatic deletion of inactive polls - Cross-Platform: Works on desktop and mobile with a clean, responsive interface Rallly is open source and can be self-hosted. The project is built with modern web technologies and offers comprehensive documentation for deployment. Self-hosting provides full control over data and privacy while maintaining all core functionality.
Self-hosted appointment scheduling software
Easy!Appointments is a self-hosted, open-source appointment scheduler designed for simplicity and flexibility. Whether you're a small business, healthcare provider, or large organization, it streamlines booking management with customizable workflows, automated reminders, and seamless third-party integrations. - Self-hosted & Open Source: Deploy on your own server for full control and data privacy. - Customizable Workflows: Adapt to any scheduling need with flexible configurations. - Automated Reminders: Send SMS or email notifications to reduce no-shows. - Payment Integration: Support for multiple payment gateways (Stripe, PayPal, etc.). - Multi-user Support: Manage multiple providers and services effortlessly. - Reports & Analytics: Track appointments, revenue, and client activity. - Third-party Integrations: Connect with CRM, email, and calendar tools. - Multi-language & Timezone Support: Serve global audiences with ease. - WordPress/Joomla/Drupal Plugins: Extend functionality to popular CMS platforms. - Docker Support: Easy deployment with pre-configured containers. - Tech Stack: PHP, MySQL, jQuery, Bootstrap. - Self-Hosting: Fully self-hosted with Docker, Apache/Nginx, and MySQL/PostgreSQL support. - Requirements: PHP 7.4+, MySQL 5.7+, Apache/Nginx, and a web server. - Documentation: Available at https://easyappointments.org/documentation. - Community Support: Active Discord, forums, and GitHub repository for troubleshooting.
Operating system for paid professional communities
Bubble Lab is the operating system for paid professional communities. It eliminates the operational overhead of running a community by consolidating member management, applications, onboarding, matchmaking, and engagement workflows into a single platform. - Member Directory: Centralized database of community members with searchable profiles by name, title, company, role, and location - Membership Management: Handle subscriptions, payments, and access control seamlessly - Automations: Automate repetitive administrative tasks to save time - Matchmaking: AI-powered member matching for meaningful connections - Chat Archive: Persistent conversation history and searchable archives - Multi-Platform Support: Works with Slack, Discord, WhatsApp, and other community tools - Customizable Workflows: Tailor onboarding, engagement, and operational processes to your community's needs - Analytics & Insights: Track community health and member engagement metrics Bubble Lab is a cloud-based SaaS platform with no self-hosting option. The service is built to integrate with existing community infrastructure while providing a unified operational layer. The platform prioritizes security, privacy, and scalability for professional communities of all sizes.
About Calendly
Calendly
Calendly is the world’s leading meeting scheduling platform, designed to eliminate the busywork around meetings. From AI-powered scheduling assistants to automated meeting recaps and follow-ups, Calendly helps you get more done with fewer tools and less effort.
Key Features of Calendly
- AI Scheduling Assistant (Callie): Coordinate meeting times directly in email threads without switching tools.
- Automated Meeting Recaps (Notetaker): Capture conversations, generate action items, and share recaps instantly.
- Built-in Payments: Charge upfront for meetings, sell packages, and send invoices seamlessly.
- Customizable Booking Links: Share your availability with full control over calendars and scheduling rules.
- Meeting Templates: Pre-built event types for one-on-one calls, group meetings, and multi-host sessions.
- Automated Reminders: Reduce no-shows with personalized email and text workflows.
- Website Embeds & Routing Forms: Let visitors book meetings directly from your site with lead qualification.
- Team Collaboration Tools: Add teammates, set permissions, and manage access for scalable scheduling.
- Mobile & Browser Extensions: Schedule meetings on the go with integrations for 150+ tools.
- Security & Compliance: Enterprise-grade security with GDPR and SOC 2 compliance.
Tech / Self-Hosting
Calendly is a SaaS platform with no self-hosting option. It integrates with popular tools like Google Calendar, Microsoft Outlook, Zoom, and Slack. The platform is built with scalability and security in mind, offering APIs for custom integrations and enterprise features like SSO and audit logs.
For developers, Calendly provides comprehensive documentation to build custom workflows and automate scheduling processes.