The best alternatives to Chadder are Telegram Messenger, Bitwarden, and Cortex. If these 3 options don't work for you, we've listed a few more alternatives below.
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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.
✨ aliceandbob.io is an open source PGP tool which helps you to generate PGP key pairs, encrypt and decrypt messages. 🎉 It is free, light, client-side and easy-to-use! 🙏 The project is based on OpenPGP.js, a JavaScript implementation of the OpenPGP protocol.
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
Encryptochat is a messaging app with a focus on user privacy. Every message is encrypted and decrypted locally with a password that is NEVER sent over the internet, making it true end-to-end encryption. Create a chatroom and share the password via QR code!