What is Cryptomator used for?

Cryptomator is a free, open-source desktop app that adds client-side encryption to cloud storage through transparent encrypted vaults. It is a good fit for encrypting Dropbox or Google Drive folders and keeping sensitive files private in the cloud.

Is Cryptomator open source?

Yes. Cryptomator is open source under the GPL-3.0 licence. Its source code is on GitHub at cryptomator/cryptomator and is written mainly in Java.

Yes. Cryptomator is open source, so the software itself is free to use. Paid plans are also available, starting at €29.99 as a one-time payment.

Can I self-host Cryptomator?

Yes. Cryptomator can be self-hosted on your own server or infrastructure; there is no official hosted version.

What is Cryptomator an alternative to?

Cryptomator is an open-source alternative to Tresorit, Sync.com, Proton Drive and pCloud. Other open-source alternatives to Tresorit include Nextcloud, ownCloud and Seafile.

Is Cryptomator actively maintained?

Yes. The most recent commit to Cryptomator was on 1 October 2026, and the latest release is 1.19.3, published on 29 June 2026. The project has 16k stars on GitHub.

Cryptomator: open-source alternative to Tresorit, Sync.com

About Cryptomator

Cryptomator encrypts files on your own device before they reach a cloud storage service. It presents an encrypted vault as a virtual drive, so you work with files as if they were on a USB flash drive while only encrypted data is synced. It runs on Windows, macOS and Linux, is written in Java and is released under the GPL-3.0 license.

It works with any cloud service that synchronizes with a local directory, including Dropbox, Google Drive, OneDrive, MEGA, pCloud, ownCloud and Nextcloud. Files are protected with AES encryption using 256-bit keys, file names are encrypted, and the folder structure is obfuscated. You can keep as many vaults as you like, each with its own password.

The security design uses scrypt key derivation and cryptographically secure random numbers, and it wipes sensitive data from memory quickly. Encryption is client-side, so no account is needed and no data is shared with an online service. The project is provided free of charge and relies on donations and sponsors for development.

Key features

Client-side AES-256 encryption for cloud files
Transparent virtual drive for each vault
Encrypted file names and obfuscated folders
Works with Dropbox, Google Drive, OneDrive and more
Multiple vaults with separate passwords
Scrypt key derivation

Good fit for

→Encrypting Dropbox or Google Drive folders
→Keeping sensitive files private in the cloud

Built with: Java
Tags: encryption; cloud-storage; privacy; security; vault; java; client-side; file-encryption

Cryptomator: questions and answers

What is Cryptomator used for?: Cryptomator is a free, open-source desktop app that adds client-side encryption to cloud storage through transparent encrypted vaults. It is a good fit for encrypting Dropbox or Google Drive folders and keeping sensitive files private in the cloud.
Is Cryptomator open source?: Yes. Cryptomator is open source under the GPL-3.0 licence. Its source code is on GitHub at cryptomator/cryptomator and is written mainly in Java.
Is Cryptomator free?: Yes. Cryptomator is open source, so the software itself is free to use. Paid plans are also available, starting at €29.99 as a one-time payment.
Can I self-host Cryptomator?: Yes. Cryptomator can be self-hosted on your own server or infrastructure; there is no official hosted version.
What is Cryptomator an alternative to?: Cryptomator is an open-source alternative to Tresorit, Sync.com, Proton Drive and pCloud. Other open-source alternatives to Tresorit include Nextcloud, ownCloud and Seafile.
Is Cryptomator actively maintained?: Yes. The most recent commit to Cryptomator was on 1 October 2026, and the latest release is 1.19.3, published on 29 June 2026. The project has 16k stars on GitHub.