# Cryptomator Cryptomator is a free and open-source client-side encryption tool that protects files stored in cloud services. It encrypts data locally on your device before it is uploaded to the cloud, ensuring that only you can read your files. It uses a zero-knowledge architecture, meaning that cloud providers and even the Cryptomator developers themselves cannot access the contents of your vaults. Cryptomator works by creating password-protected vaults within your existing cloud storage folders. When you unlock a vault, it appears as a virtual drive on your system. Any files you place in that drive are automatically encrypted (both file contents and filenames) using AES with 256-bit key length before being synced to the cloud. It integrates with most popular cloud storage providers, including Google Drive, iCloud Drive, OneDrive, SharePoint, Dropbox, pCloud, and Nextcloud. It is available on Windows, macOS, Linux, Android, and iOS, allowing access to encrypted files across all your devices. The desktop version is free (donation-based), while mobile apps require a small fee. For teams, Cryptomator Hub provides zero-knowledge key management, individual account access, and identity management integration. Being open source, the code is publicly available for inspection and auditing, which helps ensure there are no backdoors. Cryptomator won the CeBIT Innovation Award 2016 Special Award for Usable Security and Privacy. ## References - Official Website: https://cryptomator.org - Source code: https://github.com/cryptomatorapp - Documentation: https://docs.cryptomator.org - Community: https://community.cryptomator.org