2 Open Source Alternatives to Calendly

A list of 2 carefully selected open-source alternatives to Calendly.

Created by

Adrian

Mar 9, 2025Updated•3 min read

The open-source alternatives are ranked based on our custom ranking system and score. This system takes into account various factors to determine the best alternatives.

If you’re looking for alternative features or workflows, here is a prepared detailed list of Calendly open-source alternatives — each with its own distinctive strengths and key features.

Cal.com

34,405

8,815

Cal.com is a fully customizable scheduling platform that serves individuals, businesses, and developers alike. It offers a robust scheduling infrastructure designed to simplify appointment management and enhance team collaboration with flexibility and ease.

Key Features

Fully customizable booking pages and scheduling options
Seamless calendar integration to avoid double bookings
Automated workflows, notifications, and reminders
Built-in video conferencing (Cal Video) and payment integration via Stripe
Team scheduling with round-robin and collective events
Robust API and extensive app integrations
Strong security and compliance standards (SOC2, HIPAA, ISO 27001)

Cal.com provides an open-source scheduling solution that seamlessly integrates with your calendars and favorite apps, ensuring efficient booking and workflow automation. With features that range from custom booking links and automated reminders to built-in video conferencing and payment processing, the platform caters to both personal and team scheduling needs. Its versatile design supports routing forms, collective events, round-robin scheduling, and multi-language capabilities.

Learn more about Cal.com

Rallly

4,100

397

Rallly is an open-source scheduling and collaboration tool designed to simplify event organization and meeting coordination. Its user-friendly interface and no-login requirement allow users to set up polls in seconds, making scheduling hassle-free and efficient.

Key Features

Open-source and free to use
Fast setup with no login required
Multi-language support (10+ languages)
Widely adopted with a proven track record
Easy and minimal interaction for efficient scheduling

Rallly enables users to create scheduling polls quickly, streamlining the process of finding common availability among participants. With support for over 10 languages and a strong user base of over 98K registered users and 300K+ polls created, the tool is recognized for its simplicity and efficiency. Trusted by professionals from various industries, Rallly helps reduce the stress of managing scheduling tasks.

Learn more about Rallly

Price comparison of Calendly open-source alternatives

Tool	Tier 1	Tier 2	Tier 3	Details
Cal.com	$0 Individuals	$15 Teams	$37 Organizations	Learn more

* Pricing shown is based on publicly available information and may not reflect current rates. Visit each tool's website for detailed pricing information and additional tiers.

About Calendly

Calendly, a modern scheduling solution, allows you to effortlessly sync up to six of your Google, Outlook, Microsoft Office, or iCal calendars. With real-time availability and one-click scheduling, Calendly streamlines the process by connecting all your calendars, automatically checking availability, and eliminating double bookings. Rest assured, your calendar contents remain private and only available appointment times are shown to invitees. Calendly integrates with popular calendars such as Google, Outlook, Microsoft Office, and iCloud, ensuring seamless automation from start to finish. Adding location details is a breeze too, with Calendly automating the process and even integrating with video conferencing platforms like Zoom, Webex, and GoTo Meeting. Millions of users rely on Calendly to save time and boost revenue. Experience the convenience and professionalism Calendly brings by signing up for free today.

Similar Alternatives

Calendesk

Discover Calendesk's all-in-one appointment scheduling software. Automate bookings, payments, and client management effortlessly. Start your free trial today!

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