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
47,902Last commit
16 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:
Effortlessly manage events and sell tickets online
Stars
3,998Last commit
1 day 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:
Effortless group scheduling for seamless collaboration
Stars
5,222Last commit
7 hours 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
4,335Last commit
5 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:
Open source ticketing with no per-ticket fees
Stars
31Last commit
8 hours agoLicense
AGPL-3.0
Event ticketing platform with flat £50/year fee, no commission or booking charges. Open source, encrypted, self-hostable with unlimited events and tickets.
Open Source Alternative to:
Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
Sent