Cyphro is described as 'Open-source, privacy-first web application that helps you protect sensitive files without uploading them to a server. Everything happens locally in your browser, so your files never leave your device' and is an website in the security & privacy category. There are more than 10 alternatives to Cyphro, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best Cyphro alternative is 7-Zip, which is both free and Open Source. Other great sites and apps similar to Cyphro are VeraCrypt, Cryptomator, TrueCrypt and GnuPG.
Feature-rich archiving software with top-tier compression in 7z, integration in Windows Shell, AES-256 encryption, and multi-format support, including TAR, ZIP, RAR. Offers strong file management tools and a command line version for Linux/Unix systems.
Ensure your data's security by encrypting entire partitions, storage devices, or system drives with VeraCrypt. Benefit from transparent and automatic real-time encryption, hardware acceleration on modern processors, and robust security algorithms that are resistant to brute-force attacks.
Cryptomator provides transparent, client-side encryption for your cloud. Protect your documents from unauthorized access. Cryptomator is free and open source software, so you can rest assured there are no backdoors.
[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.]
GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications.
End-to-end encrypted file synchronization and sharing on desktop and mobile, featuring admin controls, auditing, link-based sharing, two-factor authentication, offline access, granular permission management, and protection for sensitive workplace documents.
Picocrypt is a very small (hence Pico), very simple, yet very secure encryption tool that you can use to protect your files. It's designed to be the go-to tool for encryption, with a focus on security, simplicity, and reliability.
Gpg4win enables users to securely transport emails and files with the help of encryption and digital signatures. Encryption protects the contents against an unwanted party reading it. Digital signatures make sure that it was not modified and comes from a specific sender.
DroidFS is an alternative way to use encrypted overlay filesystems on Android that uses its own internal file explorer instead of mounting virtual volumes. It currently only works with gocryptfs but support for CryFS could be added in the future.
Offers robust file encryption with AES-256 for premium and AES-128 for free users, integrated password manager, intuitive interface, support for cloud storage, multilingual options, offline security, group management tools, and secure file deletion features.
AstraCrypt - is a free, powerful and open-source encryption app that has everything you need to keep your data safe and secure.
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