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Alf.io

An open source conference ticket reservation system for event organizers who want full control.

About Alf.io

Alf.io is a self-hosted, open source ticket reservation system designed specifically for conference and event organizers. It handles the entire ticketing workflow from user registration to payment processing, seat assignment, and on-site check-in without locking your data inside a third party platform.

Built with Java and a modern frontend, Alf.io integrates with multiple payment gateways including Stripe, PayPal, and offline payments. It supports configurable ticket categories, promotional codes, waitlists, and automatic invoice generation. The system runs on any standard Java application server and works with PostgreSQL or MySQL databases.

This tool is ideal for tech conferences, meetups, and medium sized events that need a flexible, self-managed solution. Alf.io is released under the MIT license and was created by the Alf.io project team. It has been used by major European conferences including Devoxx and Javazone.
Billing & Automation

Quick Facts

Pricing
Open Source
License
Open Source
Platform
Any Platform
Version
2.0.0
Developer
Alf.io project