Anchor

Anchor is a lightweight, offline-first note-taking app licensed under AGPL-3.0, with a web client and an Android mobile app. It focuses deliberately on the note primitive — rich-text notes with tags, attachments, pin/archive/trash, and per-note sharing — rather than Notion's databases, wikis, and templates. Everything writes to a local database first and syncs across devices once you are back online.

Every edit hits a local database first, so writing, tagging, attaching files, and reordering notes all work with no network. When the device reconnects, the server reconciles changes and propagates them to your other devices, with an admin panel that exposes registration controls and system statistics. OIDC sign-in is supported out of the box with providers such as Pocket ID, Authelia, and Keycloak, and a review signup mode lets admins approve new accounts manually.

Yes. The share dialog on any note lets you invite another user with either viewer or editor permissions, and the recipient sees the note in their account once it syncs. Combined with OIDC SSO and the admin-controlled signup modes (disabled, enabled, review), this makes Anchor a reasonable fit for small teams that want fine-grained, note-level access without standing up a full Notion instance. Notes also support soft delete with a recovery period via the Trash view.

The recommended path is the pre-built ghcr.io/zhfahim/anchor:latest image, with a minimal docker-compose.yml in the README and optional env vars for APP_URL, JWT_SECRET, and an external PostgreSQL host. By default Anchor uses an embedded Postgres so a single docker compose up -d is enough for a personal install. An anchor:next tag is published for users who want to track pre-release builds from the next branch.