Sync-in Server is a self-hosted TypeScript platform for file storage, sync, and real-time collaboration with fine-grained RBAC, OIDC/LDAP auth, and integration with Collabora/OnlyOffice.
AFFiNE is an open-source local-first knowledge base using Rust-native CRDTs and a collaborative editor for real-time sync, offering a self-hosted Notion alternative.
drafft.ink is a Rust infinite canvas whiteboard using Loro CRDTs for real-time sync and WebGPU rendering. It features a minimal self-hosted server and an egui UI with sketchy aesthetics.
egregore uses Claude Code hooks and git-based shared memory to enable persistent, multi-agent collaboration without daemons or network calls. A shell script driven, version-controlled protocol.
Mattermost combines a Go backend and React frontend into a single binary for self-hosted enterprise collaboration. It supports rich plugins, extensive deployment options, and monthly MIT-licensed releases.
