Alf.io

Judgement

What it is

Complete system

What it does

A ticket reservation system for conferences, meetups and workshops with payments, attendee data, check-in and invoices.

Adopt it when

You run paid events and want to avoid Eventbrite fees and keep attendee data yourself.

Watch out

The 2.0 line is still published as milestones, and it needs Java and PostgreSQL hosting.

Ready for

Production-ready

Runs as

Self-hosted server

Built with

Java, Spring, TypeScript, Angular and PostgreSQL

How established

Established: started 12 years ago, latest release 2.0-M5-2609.

What the license allows

Use inside your business is unrestricted, but anything you distribute that includes it must be released under the same license.

Judged on 2026-11-03 from the project's README and GitHub data. The license and age lines are worked out directly.

Compare Alf.io

Built from

Follow it down: Alf.io → JDK → LLVM project → runs on a microchip

How compilers were built, back to punched paper tape

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