The best alternatives to Cipher are ProtonMail, Bitwarden, and Crypho. If these 3 options don't work for you, we've listed a few more alternatives below.
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ProtonMail was founded in 2013 by scientists who met at CERN and were drawn together by a shared vision of a more secure and private Internet. Since then, ProtonMail has evolved into a global effort to protect civil liberties and build a more secure Internet, with team members also hailing from Caltech, Harvard, ETH Zurich and many other research institutions.
Bitwarden is a free and open source password management solution for individuals, teams, and business organizations. The easiest and safest way for individuals and businesses to store, share, and secure sensitive data on any device.
Emoji + Encryption = Emojicryption (Using emojis in cryptography) Emojicryption is all about ciphers. Its aim is to teach you, the meaning of encryption, in a fun and simple way. Learn more