Open Source Scheduling & Event Management Tools
A curated collection of the best open source software for booking appointments and running events, covering availability sharing, calendar sync, reminders, ticketing, and attendee management..
Self-host your own scheduling page, no vendor required
Stars
50,061Last commit
2 days agoLicense
MIT
Cal.diy is the community edition of Cal.com for personal self-hosting, with calendar sync, video conferencing, payment support, and a REST API.
Open Source Alternative to:
Effortless group scheduling for seamless collaboration
Stars
5,360Last commit
2 days agoLicense
AGPL-3.0
A user-friendly, open-source tool for coordinating events and meetings without the hassle of back-and-forth emails or messages.
Open Source Alternative to:
Free open-source appointment booking for any business
Stars
4,492Last commit
2 days agoLicense
GPL-3.0
Self-hosted appointment scheduling solution with Google Calendar sync, customizable workflows, and no monthly fees. Perfect for healthcare, salons, and service businesses.
Open Source Alternative to:
Effortlessly manage events and sell tickets online
Stars
4,180Last commit
6 days agoLicense
Unknown
Hi.Events is a comprehensive platform for event management and online ticket sales, offering features like QR code check-in, custom ticket types, and embeddable widgets.
Open Source Alternative to:
Sell tickets for events, conferences, and exhibitions
Stars
2,568Last commit
2 days agoLicense
Unknown
Full-stack ticketing platform covering online shop, point of sale, access control, and hardware for events of any size or industry.
Open Source Alternative to:
Event ticketing with no per-ticket platform fees
Stars
37Last commit
6 hours agoLicense
AGPL-3.0
Sell tickets for £50/year with payments, QR check-in, refunds, reporting, and a hosted booking site. Self-hostable under AGPL-3.0.
Open Source Alternative to:
Openlane – Open-source, developer-first platform for automated compliance, risk management, and built-in Trust Center.
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