Mila is an open-source membership management tool for small and medium-sized clubs and associations. It manages member records and groups, tracks membership fees and payment status, and lets each club adapt its own data fields, roles and permissions. It also offers a self-service portal and online membership applications, CSV import and export, single sign-on through OIDC (for example Keycloak) and a connection to accounting software. Mila is a web application built on Elixir and PostgreSQL, available in German and English, with a focus on accessibility. The developers describe the current release as a first version in which breaking changes are possible.
Mila is developed by Local-IT e.V., a German association focused on digital sovereignty and free software. The source code is licensed under the AGPL-3.0, and you can host the application yourself so that member data stays on your own servers. According to the project website, Local-IT also offers managed hosting. Mila is listed in the German openCode software directory.