Lemmy is a link aggregator and community discussion platform, presented as a free alternative to Reddit. Users create thematic communities, publish links, posts, and images, then vote and comment in nested threads — the familiar experience of modern forums, without ads or tracking.

Its key feature is being federated via the ActivityPub protocol: your instance can communicate with the rest of the Fediverse (other Lemmy servers, Mastodon…) to open your communities to the outside world, or remain entirely private if you prefer internal use. You retain full control over moderation and rules.

Technically, Lemmy relies on a high-performance backend in Rust, a PostgreSQL database, and the pict-rs service for images. Self-hosted with DINAO, it offers your organization a sovereign discussion space, without opaque algorithms or data resale, hosted in France.