Hex Citadel

Spec sheet

Product

Citadel is an open-source, privacy-first cloud file sync service.Read 9 Oct 2026 · citadel.hex.pro

Integrations

Listed storage options include MinIO and AWS S3, with PostgreSQL as the database.Read 9 Oct 2026 · citadel.hex.pro

Support

The self-hosted plan includes community support; hosted service is listed with priority support.Read 9 Oct 2026 · citadel.hex.pro

Encryption

Files are encrypted on the client with AES-256-GCM before upload, and the site describes a zero-knowledge server architecture.Read 9 Oct 2026 · citadel.hex.pro

Encryption options

The features page says encryption can be enabled per file or per folder.Read 9 Oct 2026 · citadel.hex.pro

Key derivation

The features page lists Argon2id key derivation.Read 9 Oct 2026 · citadel.hex.pro

Mobile support

The features page says mobile is deferred until after version 1.0.Read 9 Oct 2026 · citadel.hex.pro

Open source

The server and client are MIT licensed, with code publicly auditable on GitHub.Read 9 Oct 2026 · citadel.hex.pro

Self-hosting

Citadel supports Docker Compose deployment with S3-compatible storage and PostgreSQL 16.Read 9 Oct 2026 · citadel.hex.pro

Server requirements

The server core requirements list Node.js 22+ LTS, PostgreSQL 16+, S3-compatible storage, and recommend Docker.Read 9 Oct 2026 · citadel.hex.pro

Sync performance

The client uses Rust acceleration for hashing and chunking, Rabin chunking, and zstd compression.Read 9 Oct 2026 · citadel.hex.pro

Web and desktop

The site lists web browser access via WASM and a macOS desktop client built on Tauri 2.Read 9 Oct 2026 · citadel.hex.pro

Plans and prices

Every Hex Citadel plan and price →

Where Specifiction places it

• Secure Cloud Storage#20 of 307.9