For clubs, associations, and federations, Hitobito replaces the member spreadsheets, sign-up forms, and mailing tools with one web application that mirrors how the organization is actually built. Chapters, regions, committees, and boards sit in a single group tree, and each person holds one or more roles that decide what they can see and change. People tables filter, import, and export to CSV, Excel, vCard, and PDF. Each record carries households, tags, notes, qualifications, and history, and a duplicates view helps clean up double entries. Events and courses accept online registrations, send overflow to a waiting list, and award qualifications that expire or renew by rule. Messages reach mailing lists as bulk e-mail, PDF letters, or SMS, and bounces are collected. The invoicing module issues single invoices and invoice runs, follows each through draft, issued, partially paid, paid, and reminded states, and can import bank payments over EBICS. Administrators edit texts, labels, tags, and course categories without writing code. Other systems sign in through an OAuth 2.0 and OpenID Connect provider and read data through a JSON:API with personal tokens or service accounts. The interface switches between German, English, French, and Italian. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.