Cryptomator

At a glance

Cryptomator offers a limited free plan; advanced features or heavier use are paid.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Plans and conditions

• Free plan: basic features are free; others are reserved for paid plans.
• Paid subscriptions from 10 € per month (price read on the official page).

About

Cryptomator provides easy-to-use, transparent, client-side encryption for your cloud. It protects your documents from unauthorized access and prying eyes, while you will still be able to view and edit your documents locally. By not requiring any registration or account and performing all encryption locally, it gives you back control over your data and ensures your privacy. Cryptomator is offered for all major platforms (including Android and iOS). Cryptomator encrypts file contents and names using the widespread industry standard AES. Your passphrase is protected against brute forcing attempts using scrypt. Additionally, directory structures get obfuscated. For more info about the Cryptomator encryption scheme, check out the online documentation. Cryptomator is a free and open-source software licensed under the GPLv3. This allows anyone to check our code. Thus, it is impossible to introduce backdoors for third parties or to hide vulnerabilities, so you do not need to trust Cryptomator. Also, vendor lock-ins are impossible. Even if we decided to stop development: The source code is already cloned by hundreds of other developers and development can be picked up by others.

Description from Flathub — AppStream (Flathub)